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execParallel.c File Reference
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Data Structures

struct  FixedParallelExecutorState
 
struct  SharedExecutorInstrumentation
 
struct  ExecParallelEstimateContext
 
struct  ExecParallelInitializeDSMContext
 

Macros

#define PARALLEL_KEY_EXECUTOR_FIXED   UINT64CONST(0xE000000000000001)
 
#define PARALLEL_KEY_PLANNEDSTMT   UINT64CONST(0xE000000000000002)
 
#define PARALLEL_KEY_PARAMLISTINFO   UINT64CONST(0xE000000000000003)
 
#define PARALLEL_KEY_BUFFER_USAGE   UINT64CONST(0xE000000000000004)
 
#define PARALLEL_KEY_TUPLE_QUEUE   UINT64CONST(0xE000000000000005)
 
#define PARALLEL_KEY_INSTRUMENTATION   UINT64CONST(0xE000000000000006)
 
#define PARALLEL_KEY_DSA   UINT64CONST(0xE000000000000007)
 
#define PARALLEL_KEY_QUERY_TEXT   UINT64CONST(0xE000000000000008)
 
#define PARALLEL_KEY_JIT_INSTRUMENTATION   UINT64CONST(0xE000000000000009)
 
#define PARALLEL_KEY_WAL_USAGE   UINT64CONST(0xE00000000000000A)
 
#define PARALLEL_TUPLE_QUEUE_SIZE   65536
 
#define GetInstrumentationArray(sei)
 

Typedefs

typedef struct FixedParallelExecutorState FixedParallelExecutorState
 
typedef struct ExecParallelEstimateContext ExecParallelEstimateContext
 
typedef struct ExecParallelInitializeDSMContext ExecParallelInitializeDSMContext
 

Functions

static char * ExecSerializePlan (Plan *plan, EState *estate)
 
static bool ExecParallelEstimate (PlanState *planstate, ExecParallelEstimateContext *e)
 
static bool ExecParallelInitializeDSM (PlanState *planstate, ExecParallelInitializeDSMContext *d)
 
static shm_mq_handle ** ExecParallelSetupTupleQueues (ParallelContext *pcxt, bool reinitialize)
 
static bool ExecParallelReInitializeDSM (PlanState *planstate, ParallelContext *pcxt)
 
static bool ExecParallelRetrieveInstrumentation (PlanState *planstate, SharedExecutorInstrumentation *instrumentation)
 
static DestReceiverExecParallelGetReceiver (dsm_segment *seg, shm_toc *toc)
 
static Size EstimateParamExecSpace (EState *estate, Bitmapset *params)
 
static dsa_pointer SerializeParamExecParams (EState *estate, Bitmapset *params, dsa_area *area)
 
static void RestoreParamExecParams (char *start_address, EState *estate)
 
ParallelExecutorInfoExecInitParallelPlan (PlanState *planstate, EState *estate, Bitmapset *sendParams, int nworkers, int64 tuples_needed)
 
void ExecParallelCreateReaders (ParallelExecutorInfo *pei)
 
void ExecParallelReinitialize (PlanState *planstate, ParallelExecutorInfo *pei, Bitmapset *sendParams)
 
static void ExecParallelRetrieveJitInstrumentation (PlanState *planstate, SharedJitInstrumentation *shared_jit)
 
void ExecParallelFinish (ParallelExecutorInfo *pei)
 
void ExecParallelCleanup (ParallelExecutorInfo *pei)
 
static QueryDescExecParallelGetQueryDesc (shm_toc *toc, DestReceiver *receiver, int instrument_options)
 
static bool ExecParallelReportInstrumentation (PlanState *planstate, SharedExecutorInstrumentation *instrumentation)
 
static bool ExecParallelInitializeWorker (PlanState *planstate, ParallelWorkerContext *pwcxt)
 
void ParallelQueryMain (dsm_segment *seg, shm_toc *toc)
 

Macro Definition Documentation

◆ GetInstrumentationArray

#define GetInstrumentationArray (   sei)
Value:
(Instrumentation *) (((char *) sei) + sei->instrument_offset))
#define AssertVariableIsOfTypeMacro(varname, typename)
Definition: c.h:968

Definition at line 108 of file execParallel.c.

◆ PARALLEL_KEY_BUFFER_USAGE

#define PARALLEL_KEY_BUFFER_USAGE   UINT64CONST(0xE000000000000004)

Definition at line 62 of file execParallel.c.

◆ PARALLEL_KEY_DSA

#define PARALLEL_KEY_DSA   UINT64CONST(0xE000000000000007)

Definition at line 65 of file execParallel.c.

◆ PARALLEL_KEY_EXECUTOR_FIXED

#define PARALLEL_KEY_EXECUTOR_FIXED   UINT64CONST(0xE000000000000001)

Definition at line 59 of file execParallel.c.

◆ PARALLEL_KEY_INSTRUMENTATION

#define PARALLEL_KEY_INSTRUMENTATION   UINT64CONST(0xE000000000000006)

Definition at line 64 of file execParallel.c.

◆ PARALLEL_KEY_JIT_INSTRUMENTATION

#define PARALLEL_KEY_JIT_INSTRUMENTATION   UINT64CONST(0xE000000000000009)

Definition at line 67 of file execParallel.c.

◆ PARALLEL_KEY_PARAMLISTINFO

#define PARALLEL_KEY_PARAMLISTINFO   UINT64CONST(0xE000000000000003)

Definition at line 61 of file execParallel.c.

◆ PARALLEL_KEY_PLANNEDSTMT

#define PARALLEL_KEY_PLANNEDSTMT   UINT64CONST(0xE000000000000002)

Definition at line 60 of file execParallel.c.

◆ PARALLEL_KEY_QUERY_TEXT

#define PARALLEL_KEY_QUERY_TEXT   UINT64CONST(0xE000000000000008)

Definition at line 66 of file execParallel.c.

◆ PARALLEL_KEY_TUPLE_QUEUE

#define PARALLEL_KEY_TUPLE_QUEUE   UINT64CONST(0xE000000000000005)

Definition at line 63 of file execParallel.c.

◆ PARALLEL_KEY_WAL_USAGE

#define PARALLEL_KEY_WAL_USAGE   UINT64CONST(0xE00000000000000A)

Definition at line 68 of file execParallel.c.

◆ PARALLEL_TUPLE_QUEUE_SIZE

#define PARALLEL_TUPLE_QUEUE_SIZE   65536

Definition at line 70 of file execParallel.c.

Typedef Documentation

◆ ExecParallelEstimateContext

◆ ExecParallelInitializeDSMContext

◆ FixedParallelExecutorState

Function Documentation

◆ EstimateParamExecSpace()

static Size EstimateParamExecSpace ( EState estate,
Bitmapset params 
)
static

Definition at line 313 of file execParallel.c.

314 {
315  int paramid;
316  Size sz = sizeof(int);
317 
318  paramid = -1;
319  while ((paramid = bms_next_member(params, paramid)) >= 0)
320  {
321  Oid typeOid;
322  int16 typLen;
323  bool typByVal;
324  ParamExecData *prm;
325 
326  prm = &(estate->es_param_exec_vals[paramid]);
327  typeOid = list_nth_oid(estate->es_plannedstmt->paramExecTypes,
328  paramid);
329 
330  sz = add_size(sz, sizeof(int)); /* space for paramid */
331 
332  /* space for datum/isnull */
333  if (OidIsValid(typeOid))
334  get_typlenbyval(typeOid, &typLen, &typByVal);
335  else
336  {
337  /* If no type OID, assume by-value, like copyParamList does. */
338  typLen = sizeof(Datum);
339  typByVal = true;
340  }
341  sz = add_size(sz,
342  datumEstimateSpace(prm->value, prm->isnull,
343  typByVal, typLen));
344  }
345  return sz;
346 }
int bms_next_member(const Bitmapset *a, int prevbit)
Definition: bitmapset.c:1039
signed short int16
Definition: c.h:477
#define OidIsValid(objectId)
Definition: c.h:759
size_t Size
Definition: c.h:589
Size datumEstimateSpace(Datum value, bool isnull, bool typByVal, int typLen)
Definition: datum.c:412
void get_typlenbyval(Oid typid, int16 *typlen, bool *typbyval)
Definition: lsyscache.c:2209
static Oid list_nth_oid(const List *list, int n)
Definition: pg_list.h:321
uintptr_t Datum
Definition: postgres.h:64
unsigned int Oid
Definition: postgres_ext.h:31
Size add_size(Size s1, Size s2)
Definition: shmem.c:502
PlannedStmt * es_plannedstmt
Definition: execnodes.h:625
ParamExecData * es_param_exec_vals
Definition: execnodes.h:655
bool isnull
Definition: params.h:150
Datum value
Definition: params.h:149
List * paramExecTypes
Definition: plannodes.h:97

References add_size(), bms_next_member(), datumEstimateSpace(), EState::es_param_exec_vals, EState::es_plannedstmt, get_typlenbyval(), ParamExecData::isnull, list_nth_oid(), OidIsValid, PlannedStmt::paramExecTypes, and ParamExecData::value.

Referenced by SerializeParamExecParams().

◆ ExecInitParallelPlan()

ParallelExecutorInfo* ExecInitParallelPlan ( PlanState planstate,
EState estate,
Bitmapset sendParams,
int  nworkers,
int64  tuples_needed 
)

Definition at line 590 of file execParallel.c.

593 {
595  ParallelContext *pcxt;
599  char *pstmt_data;
600  char *pstmt_space;
601  char *paramlistinfo_space;
602  BufferUsage *bufusage_space;
603  WalUsage *walusage_space;
604  SharedExecutorInstrumentation *instrumentation = NULL;
605  SharedJitInstrumentation *jit_instrumentation = NULL;
606  int pstmt_len;
607  int paramlistinfo_len;
608  int instrumentation_len = 0;
609  int jit_instrumentation_len = 0;
610  int instrument_offset = 0;
611  Size dsa_minsize = dsa_minimum_size();
612  char *query_string;
613  int query_len;
614 
615  /*
616  * Force any initplan outputs that we're going to pass to workers to be
617  * evaluated, if they weren't already.
618  *
619  * For simplicity, we use the EState's per-output-tuple ExprContext here.
620  * That risks intra-query memory leakage, since we might pass through here
621  * many times before that ExprContext gets reset; but ExecSetParamPlan
622  * doesn't normally leak any memory in the context (see its comments), so
623  * it doesn't seem worth complicating this function's API to pass it a
624  * shorter-lived ExprContext. This might need to change someday.
625  */
626  ExecSetParamPlanMulti(sendParams, GetPerTupleExprContext(estate));
627 
628  /* Allocate object for return value. */
629  pei = palloc0(sizeof(ParallelExecutorInfo));
630  pei->finished = false;
631  pei->planstate = planstate;
632 
633  /* Fix up and serialize plan to be sent to workers. */
634  pstmt_data = ExecSerializePlan(planstate->plan, estate);
635 
636  /* Create a parallel context. */
637  pcxt = CreateParallelContext("postgres", "ParallelQueryMain", nworkers);
638  pei->pcxt = pcxt;
639 
640  /*
641  * Before telling the parallel context to create a dynamic shared memory
642  * segment, we need to figure out how big it should be. Estimate space
643  * for the various things we need to store.
644  */
645 
646  /* Estimate space for fixed-size state. */
649  shm_toc_estimate_keys(&pcxt->estimator, 1);
650 
651  /* Estimate space for query text. */
652  query_len = strlen(estate->es_sourceText);
653  shm_toc_estimate_chunk(&pcxt->estimator, query_len + 1);
654  shm_toc_estimate_keys(&pcxt->estimator, 1);
655 
656  /* Estimate space for serialized PlannedStmt. */
657  pstmt_len = strlen(pstmt_data) + 1;
658  shm_toc_estimate_chunk(&pcxt->estimator, pstmt_len);
659  shm_toc_estimate_keys(&pcxt->estimator, 1);
660 
661  /* Estimate space for serialized ParamListInfo. */
662  paramlistinfo_len = EstimateParamListSpace(estate->es_param_list_info);
663  shm_toc_estimate_chunk(&pcxt->estimator, paramlistinfo_len);
664  shm_toc_estimate_keys(&pcxt->estimator, 1);
665 
666  /*
667  * Estimate space for BufferUsage.
668  *
669  * If EXPLAIN is not in use and there are no extensions loaded that care,
670  * we could skip this. But we have no way of knowing whether anyone's
671  * looking at pgBufferUsage, so do it unconditionally.
672  */
674  mul_size(sizeof(BufferUsage), pcxt->nworkers));
675  shm_toc_estimate_keys(&pcxt->estimator, 1);
676 
677  /*
678  * Same thing for WalUsage.
679  */
681  mul_size(sizeof(WalUsage), pcxt->nworkers));
682  shm_toc_estimate_keys(&pcxt->estimator, 1);
683 
684  /* Estimate space for tuple queues. */
687  shm_toc_estimate_keys(&pcxt->estimator, 1);
688 
689  /*
690  * Give parallel-aware nodes a chance to add to the estimates, and get a
691  * count of how many PlanState nodes there are.
692  */
693  e.pcxt = pcxt;
694  e.nnodes = 0;
695  ExecParallelEstimate(planstate, &e);
696 
697  /* Estimate space for instrumentation, if required. */
698  if (estate->es_instrument)
699  {
700  instrumentation_len =
701  offsetof(SharedExecutorInstrumentation, plan_node_id) +
702  sizeof(int) * e.nnodes;
703  instrumentation_len = MAXALIGN(instrumentation_len);
704  instrument_offset = instrumentation_len;
705  instrumentation_len +=
706  mul_size(sizeof(Instrumentation),
707  mul_size(e.nnodes, nworkers));
708  shm_toc_estimate_chunk(&pcxt->estimator, instrumentation_len);
709  shm_toc_estimate_keys(&pcxt->estimator, 1);
710 
711  /* Estimate space for JIT instrumentation, if required. */
712  if (estate->es_jit_flags != PGJIT_NONE)
713  {
714  jit_instrumentation_len =
715  offsetof(SharedJitInstrumentation, jit_instr) +
716  sizeof(JitInstrumentation) * nworkers;
717  shm_toc_estimate_chunk(&pcxt->estimator, jit_instrumentation_len);
718  shm_toc_estimate_keys(&pcxt->estimator, 1);
719  }
720  }
721 
722  /* Estimate space for DSA area. */
723  shm_toc_estimate_chunk(&pcxt->estimator, dsa_minsize);
724  shm_toc_estimate_keys(&pcxt->estimator, 1);
725 
726  /* Everyone's had a chance to ask for space, so now create the DSM. */
727  InitializeParallelDSM(pcxt);
728 
729  /*
730  * OK, now we have a dynamic shared memory segment, and it should be big
731  * enough to store all of the data we estimated we would want to put into
732  * it, plus whatever general stuff (not specifically executor-related) the
733  * ParallelContext itself needs to store there. None of the space we
734  * asked for has been allocated or initialized yet, though, so do that.
735  */
736 
737  /* Store fixed-size state. */
738  fpes = shm_toc_allocate(pcxt->toc, sizeof(FixedParallelExecutorState));
739  fpes->tuples_needed = tuples_needed;
741  fpes->eflags = estate->es_top_eflags;
742  fpes->jit_flags = estate->es_jit_flags;
744 
745  /* Store query string */
746  query_string = shm_toc_allocate(pcxt->toc, query_len + 1);
747  memcpy(query_string, estate->es_sourceText, query_len + 1);
748  shm_toc_insert(pcxt->toc, PARALLEL_KEY_QUERY_TEXT, query_string);
749 
750  /* Store serialized PlannedStmt. */
751  pstmt_space = shm_toc_allocate(pcxt->toc, pstmt_len);
752  memcpy(pstmt_space, pstmt_data, pstmt_len);
753  shm_toc_insert(pcxt->toc, PARALLEL_KEY_PLANNEDSTMT, pstmt_space);
754 
755  /* Store serialized ParamListInfo. */
756  paramlistinfo_space = shm_toc_allocate(pcxt->toc, paramlistinfo_len);
757  shm_toc_insert(pcxt->toc, PARALLEL_KEY_PARAMLISTINFO, paramlistinfo_space);
758  SerializeParamList(estate->es_param_list_info, &paramlistinfo_space);
759 
760  /* Allocate space for each worker's BufferUsage; no need to initialize. */
761  bufusage_space = shm_toc_allocate(pcxt->toc,
762  mul_size(sizeof(BufferUsage), pcxt->nworkers));
763  shm_toc_insert(pcxt->toc, PARALLEL_KEY_BUFFER_USAGE, bufusage_space);
764  pei->buffer_usage = bufusage_space;
765 
766  /* Same for WalUsage. */
767  walusage_space = shm_toc_allocate(pcxt->toc,
768  mul_size(sizeof(WalUsage), pcxt->nworkers));
769  shm_toc_insert(pcxt->toc, PARALLEL_KEY_WAL_USAGE, walusage_space);
770  pei->wal_usage = walusage_space;
771 
772  /* Set up the tuple queues that the workers will write into. */
773  pei->tqueue = ExecParallelSetupTupleQueues(pcxt, false);
774 
775  /* We don't need the TupleQueueReaders yet, though. */
776  pei->reader = NULL;
777 
778  /*
779  * If instrumentation options were supplied, allocate space for the data.
780  * It only gets partially initialized here; the rest happens during
781  * ExecParallelInitializeDSM.
782  */
783  if (estate->es_instrument)
784  {
785  Instrumentation *instrument;
786  int i;
787 
788  instrumentation = shm_toc_allocate(pcxt->toc, instrumentation_len);
789  instrumentation->instrument_options = estate->es_instrument;
790  instrumentation->instrument_offset = instrument_offset;
791  instrumentation->num_workers = nworkers;
792  instrumentation->num_plan_nodes = e.nnodes;
793  instrument = GetInstrumentationArray(instrumentation);
794  for (i = 0; i < nworkers * e.nnodes; ++i)
795  InstrInit(&instrument[i], estate->es_instrument);
797  instrumentation);
798  pei->instrumentation = instrumentation;
799 
800  if (estate->es_jit_flags != PGJIT_NONE)
801  {
802  jit_instrumentation = shm_toc_allocate(pcxt->toc,
803  jit_instrumentation_len);
804  jit_instrumentation->num_workers = nworkers;
805  memset(jit_instrumentation->jit_instr, 0,
806  sizeof(JitInstrumentation) * nworkers);
808  jit_instrumentation);
809  pei->jit_instrumentation = jit_instrumentation;
810  }
811  }
812 
813  /*
814  * Create a DSA area that can be used by the leader and all workers.
815  * (However, if we failed to create a DSM and are using private memory
816  * instead, then skip this.)
817  */
818  if (pcxt->seg != NULL)
819  {
820  char *area_space;
821 
822  area_space = shm_toc_allocate(pcxt->toc, dsa_minsize);
823  shm_toc_insert(pcxt->toc, PARALLEL_KEY_DSA, area_space);
824  pei->area = dsa_create_in_place(area_space, dsa_minsize,
826  pcxt->seg);
827 
828  /*
829  * Serialize parameters, if any, using DSA storage. We don't dare use
830  * the main parallel query DSM for this because we might relaunch
831  * workers after the values have changed (and thus the amount of
832  * storage required has changed).
833  */
834  if (!bms_is_empty(sendParams))
835  {
836  pei->param_exec = SerializeParamExecParams(estate, sendParams,
837  pei->area);
838  fpes->param_exec = pei->param_exec;
839  }
840  }
841 
842  /*
843  * Give parallel-aware nodes a chance to initialize their shared data.
844  * This also initializes the elements of instrumentation->ps_instrument,
845  * if it exists.
846  */
847  d.pcxt = pcxt;
848  d.instrumentation = instrumentation;
849  d.nnodes = 0;
850 
851  /* Install our DSA area while initializing the plan. */
852  estate->es_query_dsa = pei->area;
853  ExecParallelInitializeDSM(planstate, &d);
854  estate->es_query_dsa = NULL;
855 
856  /*
857  * Make sure that the world hasn't shifted under our feet. This could
858  * probably just be an Assert(), but let's be conservative for now.
859  */
860  if (e.nnodes != d.nnodes)
861  elog(ERROR, "inconsistent count of PlanState nodes");
862 
863  /* OK, we're ready to rock and roll. */
864  return pei;
865 }
void InitializeParallelDSM(ParallelContext *pcxt)
Definition: parallel.c:203
ParallelContext * CreateParallelContext(const char *library_name, const char *function_name, int nworkers)
Definition: parallel.c:165
#define bms_is_empty(a)
Definition: bitmapset.h:105
#define MAXALIGN(LEN)
Definition: c.h:795
dsa_area * dsa_create_in_place(void *place, size_t size, int tranche_id, dsm_segment *segment)
Definition: dsa.c:481
size_t dsa_minimum_size(void)
Definition: dsa.c:1181
#define InvalidDsaPointer
Definition: dsa.h:78
#define ERROR
Definition: elog.h:39
#define PARALLEL_KEY_BUFFER_USAGE
Definition: execParallel.c:62
#define PARALLEL_KEY_JIT_INSTRUMENTATION
Definition: execParallel.c:67
#define PARALLEL_KEY_PARAMLISTINFO
Definition: execParallel.c:61
#define PARALLEL_TUPLE_QUEUE_SIZE
Definition: execParallel.c:70
static dsa_pointer SerializeParamExecParams(EState *estate, Bitmapset *params, dsa_area *area)
Definition: execParallel.c:357
#define PARALLEL_KEY_INSTRUMENTATION
Definition: execParallel.c:64
static shm_mq_handle ** ExecParallelSetupTupleQueues(ParallelContext *pcxt, bool reinitialize)
Definition: execParallel.c:538
#define PARALLEL_KEY_PLANNEDSTMT
Definition: execParallel.c:60
static bool ExecParallelEstimate(PlanState *planstate, ExecParallelEstimateContext *e)
Definition: execParallel.c:232
#define GetInstrumentationArray(sei)
Definition: execParallel.c:108
#define PARALLEL_KEY_DSA
Definition: execParallel.c:65
#define PARALLEL_KEY_EXECUTOR_FIXED
Definition: execParallel.c:59
static char * ExecSerializePlan(Plan *plan, EState *estate)
Definition: execParallel.c:147
#define PARALLEL_KEY_QUERY_TEXT
Definition: execParallel.c:66
#define PARALLEL_KEY_WAL_USAGE
Definition: execParallel.c:68
static bool ExecParallelInitializeDSM(PlanState *planstate, ExecParallelInitializeDSMContext *d)
Definition: execParallel.c:441
#define GetPerTupleExprContext(estate)
Definition: executor.h:548
void InstrInit(Instrumentation *instr, int instrument_options)
Definition: instrument.c:58
int i
Definition: isn.c:73
struct JitInstrumentation JitInstrumentation
#define PGJIT_NONE
Definition: jit.h:19
@ LWTRANCHE_PARALLEL_QUERY_DSA
Definition: lwlock.h:196
void * palloc0(Size size)
Definition: mcxt.c:1241
void ExecSetParamPlanMulti(const Bitmapset *params, ExprContext *econtext)
Definition: nodeSubplan.c:1268
Size EstimateParamListSpace(ParamListInfo paramLI)
Definition: params.c:167
void SerializeParamList(ParamListInfo paramLI, char **start_address)
Definition: params.c:229
e
Definition: preproc-init.c:82
void shm_toc_insert(shm_toc *toc, uint64 key, void *address)
Definition: shm_toc.c:171
void * shm_toc_allocate(shm_toc *toc, Size nbytes)
Definition: shm_toc.c:88
#define shm_toc_estimate_chunk(e, sz)
Definition: shm_toc.h:51
#define shm_toc_estimate_keys(e, cnt)
Definition: shm_toc.h:53
Size mul_size(Size s1, Size s2)
Definition: shmem.c:519
struct dsa_area * es_query_dsa
Definition: execnodes.h:694
int es_top_eflags
Definition: execnodes.h:666
int es_instrument
Definition: execnodes.h:667
ParamListInfo es_param_list_info
Definition: execnodes.h:654
int es_jit_flags
Definition: execnodes.h:705
const char * es_sourceText
Definition: execnodes.h:627
SharedExecutorInstrumentation * instrumentation
Definition: execParallel.c:123
dsm_segment * seg
Definition: parallel.h:43
shm_toc_estimator estimator
Definition: parallel.h:42
shm_toc * toc
Definition: parallel.h:45
PlanState * planstate
Definition: execParallel.h:26
struct SharedJitInstrumentation * jit_instrumentation
Definition: execParallel.h:31
BufferUsage * buffer_usage
Definition: execParallel.h:28
dsa_pointer param_exec
Definition: execParallel.h:33
ParallelContext * pcxt
Definition: execParallel.h:27
WalUsage * wal_usage
Definition: execParallel.h:29
shm_mq_handle ** tqueue
Definition: execParallel.h:36
SharedExecutorInstrumentation * instrumentation
Definition: execParallel.h:30
struct TupleQueueReader ** reader
Definition: execParallel.h:37
Plan * plan
Definition: execnodes.h:1035
JitInstrumentation jit_instr[FLEXIBLE_ARRAY_MEMBER]
Definition: jit.h:51

References ParallelExecutorInfo::area, bms_is_empty, ParallelExecutorInfo::buffer_usage, CreateParallelContext(), dsa_create_in_place(), dsa_minimum_size(), FixedParallelExecutorState::eflags, elog(), ERROR, EState::es_instrument, EState::es_jit_flags, EState::es_param_list_info, EState::es_query_dsa, EState::es_sourceText, EState::es_top_eflags, EstimateParamListSpace(), ParallelContext::estimator, ExecParallelEstimate(), ExecParallelInitializeDSM(), ExecParallelSetupTupleQueues(), ExecSerializePlan(), ExecSetParamPlanMulti(), ParallelExecutorInfo::finished, GetInstrumentationArray, GetPerTupleExprContext, i, InitializeParallelDSM(), InstrInit(), SharedExecutorInstrumentation::instrument_offset, SharedExecutorInstrumentation::instrument_options, ExecParallelInitializeDSMContext::instrumentation, ParallelExecutorInfo::instrumentation, InvalidDsaPointer, FixedParallelExecutorState::jit_flags, SharedJitInstrumentation::jit_instr, ParallelExecutorInfo::jit_instrumentation, LWTRANCHE_PARALLEL_QUERY_DSA, MAXALIGN, mul_size(), ExecParallelInitializeDSMContext::nnodes, SharedExecutorInstrumentation::num_plan_nodes, SharedExecutorInstrumentation::num_workers, SharedJitInstrumentation::num_workers, ParallelContext::nworkers, palloc0(), PARALLEL_KEY_BUFFER_USAGE, PARALLEL_KEY_DSA, PARALLEL_KEY_EXECUTOR_FIXED, PARALLEL_KEY_INSTRUMENTATION, PARALLEL_KEY_JIT_INSTRUMENTATION, PARALLEL_KEY_PARAMLISTINFO, PARALLEL_KEY_PLANNEDSTMT, PARALLEL_KEY_QUERY_TEXT, PARALLEL_KEY_WAL_USAGE, PARALLEL_TUPLE_QUEUE_SIZE, FixedParallelExecutorState::param_exec, ParallelExecutorInfo::param_exec, ExecParallelInitializeDSMContext::pcxt, ParallelExecutorInfo::pcxt, PGJIT_NONE, PlanState::plan, ParallelExecutorInfo::planstate, ParallelExecutorInfo::reader, ParallelContext::seg, SerializeParamExecParams(), SerializeParamList(), shm_toc_allocate(), shm_toc_estimate_chunk, shm_toc_estimate_keys, shm_toc_insert(), ParallelContext::toc, ParallelExecutorInfo::tqueue, FixedParallelExecutorState::tuples_needed, and ParallelExecutorInfo::wal_usage.

Referenced by ExecGather(), and ExecGatherMerge().

◆ ExecParallelCleanup()

void ExecParallelCleanup ( ParallelExecutorInfo pei)

Definition at line 1180 of file execParallel.c.

1181 {
1182  /* Accumulate instrumentation, if any. */
1183  if (pei->instrumentation)
1185  pei->instrumentation);
1186 
1187  /* Accumulate JIT instrumentation, if any. */
1188  if (pei->jit_instrumentation)
1190  pei->jit_instrumentation);
1191 
1192  /* Free any serialized parameters. */
1193  if (DsaPointerIsValid(pei->param_exec))
1194  {
1195  dsa_free(pei->area, pei->param_exec);
1197  }
1198  if (pei->area != NULL)
1199  {
1200  dsa_detach(pei->area);
1201  pei->area = NULL;
1202  }
1203  if (pei->pcxt != NULL)
1204  {
1206  pei->pcxt = NULL;
1207  }
1208  pfree(pei);
1209 }
void DestroyParallelContext(ParallelContext *pcxt)
Definition: parallel.c:927
void dsa_detach(dsa_area *area)
Definition: dsa.c:1922
void dsa_free(dsa_area *area, dsa_pointer dp)
Definition: dsa.c:832
#define DsaPointerIsValid(x)
Definition: dsa.h:81
static bool ExecParallelRetrieveInstrumentation(PlanState *planstate, SharedExecutorInstrumentation *instrumentation)
static void ExecParallelRetrieveJitInstrumentation(PlanState *planstate, SharedJitInstrumentation *shared_jit)
void pfree(void *pointer)
Definition: mcxt.c:1436

References ParallelExecutorInfo::area, DestroyParallelContext(), dsa_detach(), dsa_free(), DsaPointerIsValid, ExecParallelRetrieveInstrumentation(), ExecParallelRetrieveJitInstrumentation(), ParallelExecutorInfo::instrumentation, InvalidDsaPointer, ParallelExecutorInfo::jit_instrumentation, ParallelExecutorInfo::param_exec, ParallelExecutorInfo::pcxt, pfree(), and ParallelExecutorInfo::planstate.

Referenced by ExecShutdownGather(), and ExecShutdownGatherMerge().

◆ ExecParallelCreateReaders()

void ExecParallelCreateReaders ( ParallelExecutorInfo pei)

Definition at line 874 of file execParallel.c.

875 {
876  int nworkers = pei->pcxt->nworkers_launched;
877  int i;
878 
879  Assert(pei->reader == NULL);
880 
881  if (nworkers > 0)
882  {
883  pei->reader = (TupleQueueReader **)
884  palloc(nworkers * sizeof(TupleQueueReader *));
885 
886  for (i = 0; i < nworkers; i++)
887  {
888  shm_mq_set_handle(pei->tqueue[i],
889  pei->pcxt->worker[i].bgwhandle);
890  pei->reader[i] = CreateTupleQueueReader(pei->tqueue[i]);
891  }
892  }
893 }
Assert(fmt[strlen(fmt) - 1] !='\n')
void * palloc(Size size)
Definition: mcxt.c:1210
void shm_mq_set_handle(shm_mq_handle *mqh, BackgroundWorkerHandle *handle)
Definition: shm_mq.c:320
ParallelWorkerInfo * worker
Definition: parallel.h:46
int nworkers_launched
Definition: parallel.h:38
BackgroundWorkerHandle * bgwhandle
Definition: parallel.h:27
TupleQueueReader * CreateTupleQueueReader(shm_mq_handle *handle)
Definition: tqueue.c:139

References Assert(), ParallelWorkerInfo::bgwhandle, CreateTupleQueueReader(), i, ParallelContext::nworkers_launched, palloc(), ParallelExecutorInfo::pcxt, ParallelExecutorInfo::reader, shm_mq_set_handle(), ParallelExecutorInfo::tqueue, and ParallelContext::worker.

Referenced by ExecGather(), and ExecGatherMerge().

◆ ExecParallelEstimate()

static bool ExecParallelEstimate ( PlanState planstate,
ExecParallelEstimateContext e 
)
static

Definition at line 232 of file execParallel.c.

233 {
234  if (planstate == NULL)
235  return false;
236 
237  /* Count this node. */
238  e->nnodes++;
239 
240  switch (nodeTag(planstate))
241  {
242  case T_SeqScanState:
243  if (planstate->plan->parallel_aware)
244  ExecSeqScanEstimate((SeqScanState *) planstate,
245  e->pcxt);
246  break;
247  case T_IndexScanState:
248  if (planstate->plan->parallel_aware)
250  e->pcxt);
251  break;
252  case T_IndexOnlyScanState:
253  if (planstate->plan->parallel_aware)
255  e->pcxt);
256  break;
257  case T_ForeignScanState:
258  if (planstate->plan->parallel_aware)
260  e->pcxt);
261  break;
262  case T_AppendState:
263  if (planstate->plan->parallel_aware)
264  ExecAppendEstimate((AppendState *) planstate,
265  e->pcxt);
266  break;
267  case T_CustomScanState:
268  if (planstate->plan->parallel_aware)
270  e->pcxt);
271  break;
272  case T_BitmapHeapScanState:
273  if (planstate->plan->parallel_aware)
275  e->pcxt);
276  break;
277  case T_HashJoinState:
278  if (planstate->plan->parallel_aware)
279  ExecHashJoinEstimate((HashJoinState *) planstate,
280  e->pcxt);
281  break;
282  case T_HashState:
283  /* even when not parallel-aware, for EXPLAIN ANALYZE */
284  ExecHashEstimate((HashState *) planstate, e->pcxt);
285  break;
286  case T_SortState:
287  /* even when not parallel-aware, for EXPLAIN ANALYZE */
288  ExecSortEstimate((SortState *) planstate, e->pcxt);
289  break;
290  case T_IncrementalSortState:
291  /* even when not parallel-aware, for EXPLAIN ANALYZE */
292  ExecIncrementalSortEstimate((IncrementalSortState *) planstate, e->pcxt);
293  break;
294  case T_AggState:
295  /* even when not parallel-aware, for EXPLAIN ANALYZE */
296  ExecAggEstimate((AggState *) planstate, e->pcxt);
297  break;
298  case T_MemoizeState:
299  /* even when not parallel-aware, for EXPLAIN ANALYZE */
300  ExecMemoizeEstimate((MemoizeState *) planstate, e->pcxt);
301  break;
302  default:
303  break;
304  }
305 
306  return planstate_tree_walker(planstate, ExecParallelEstimate, e);
307 }
void ExecAggEstimate(AggState *node, ParallelContext *pcxt)
Definition: nodeAgg.c:4686
void ExecAppendEstimate(AppendState *node, ParallelContext *pcxt)
Definition: nodeAppend.c:485
void ExecBitmapHeapEstimate(BitmapHeapScanState *node, ParallelContext *pcxt)
void ExecCustomScanEstimate(CustomScanState *node, ParallelContext *pcxt)
Definition: nodeCustom.c:171
void ExecForeignScanEstimate(ForeignScanState *node, ParallelContext *pcxt)
#define planstate_tree_walker(ps, w, c)
Definition: nodeFuncs.h:177
void ExecHashEstimate(HashState *node, ParallelContext *pcxt)
Definition: nodeHash.c:2588
void ExecHashJoinEstimate(HashJoinState *state, ParallelContext *pcxt)
void ExecIncrementalSortEstimate(IncrementalSortState *node, ParallelContext *pcxt)
void ExecIndexOnlyScanEstimate(IndexOnlyScanState *node, ParallelContext *pcxt)
void ExecIndexScanEstimate(IndexScanState *node, ParallelContext *pcxt)
void ExecMemoizeEstimate(MemoizeState *node, ParallelContext *pcxt)
Definition: nodeMemoize.c:1159
void ExecSeqScanEstimate(SeqScanState *node, ParallelContext *pcxt)
Definition: nodeSeqscan.c:250
void ExecSortEstimate(SortState *node, ParallelContext *pcxt)
Definition: nodeSort.c:423
#define nodeTag(nodeptr)
Definition: nodes.h:133
bool parallel_aware
Definition: plannodes.h:144

References ExecAggEstimate(), ExecAppendEstimate(), ExecBitmapHeapEstimate(), ExecCustomScanEstimate(), ExecForeignScanEstimate(), ExecHashEstimate(), ExecHashJoinEstimate(), ExecIncrementalSortEstimate(), ExecIndexOnlyScanEstimate(), ExecIndexScanEstimate(), ExecMemoizeEstimate(), ExecSeqScanEstimate(), ExecSortEstimate(), nodeTag, Plan::parallel_aware, PlanState::plan, and planstate_tree_walker.

Referenced by ExecInitParallelPlan().

◆ ExecParallelFinish()

void ExecParallelFinish ( ParallelExecutorInfo pei)

Definition at line 1127 of file execParallel.c.

1128 {
1129  int nworkers = pei->pcxt->nworkers_launched;
1130  int i;
1131 
1132  /* Make this be a no-op if called twice in a row. */
1133  if (pei->finished)
1134  return;
1135 
1136  /*
1137  * Detach from tuple queues ASAP, so that any still-active workers will
1138  * notice that no further results are wanted.
1139  */
1140  if (pei->tqueue != NULL)
1141  {
1142  for (i = 0; i < nworkers; i++)
1143  shm_mq_detach(pei->tqueue[i]);
1144  pfree(pei->tqueue);
1145  pei->tqueue = NULL;
1146  }
1147 
1148  /*
1149  * While we're waiting for the workers to finish, let's get rid of the
1150  * tuple queue readers. (Any other local cleanup could be done here too.)
1151  */
1152  if (pei->reader != NULL)
1153  {
1154  for (i = 0; i < nworkers; i++)
1156  pfree(pei->reader);
1157  pei->reader = NULL;
1158  }
1159 
1160  /* Now wait for the workers to finish. */
1162 
1163  /*
1164  * Next, accumulate buffer/WAL usage. (This must wait for the workers to
1165  * finish, or we might get incomplete data.)
1166  */
1167  for (i = 0; i < nworkers; i++)
1169 
1170  pei->finished = true;
1171 }
void WaitForParallelWorkersToFinish(ParallelContext *pcxt)
Definition: parallel.c:773
void InstrAccumParallelQuery(BufferUsage *bufusage, WalUsage *walusage)
Definition: instrument.c:218
void shm_mq_detach(shm_mq_handle *mqh)
Definition: shm_mq.c:844
void DestroyTupleQueueReader(TupleQueueReader *reader)
Definition: tqueue.c:155

References ParallelExecutorInfo::buffer_usage, DestroyTupleQueueReader(), ParallelExecutorInfo::finished, i, InstrAccumParallelQuery(), ParallelContext::nworkers_launched, ParallelExecutorInfo::pcxt, pfree(), ParallelExecutorInfo::reader, shm_mq_detach(), ParallelExecutorInfo::tqueue, WaitForParallelWorkersToFinish(), and ParallelExecutorInfo::wal_usage.

Referenced by ExecShutdownGatherMergeWorkers(), and ExecShutdownGatherWorkers().

◆ ExecParallelGetQueryDesc()

static QueryDesc* ExecParallelGetQueryDesc ( shm_toc toc,
DestReceiver receiver,
int  instrument_options 
)
static

Definition at line 1232 of file execParallel.c.

1234 {
1235  char *pstmtspace;
1236  char *paramspace;
1237  PlannedStmt *pstmt;
1238  ParamListInfo paramLI;
1239  char *queryString;
1240 
1241  /* Get the query string from shared memory */
1242  queryString = shm_toc_lookup(toc, PARALLEL_KEY_QUERY_TEXT, false);
1243 
1244  /* Reconstruct leader-supplied PlannedStmt. */
1245  pstmtspace = shm_toc_lookup(toc, PARALLEL_KEY_PLANNEDSTMT, false);
1246  pstmt = (PlannedStmt *) stringToNode(pstmtspace);
1247 
1248  /* Reconstruct ParamListInfo. */
1249  paramspace = shm_toc_lookup(toc, PARALLEL_KEY_PARAMLISTINFO, false);
1250  paramLI = RestoreParamList(&paramspace);
1251 
1252  /* Create a QueryDesc for the query. */
1253  return CreateQueryDesc(pstmt,
1254  queryString,
1256  receiver, paramLI, NULL, instrument_options);
1257 }
ParamListInfo RestoreParamList(char **start_address)
Definition: params.c:292
QueryDesc * CreateQueryDesc(PlannedStmt *plannedstmt, const char *sourceText, Snapshot snapshot, Snapshot crosscheck_snapshot, DestReceiver *dest, ParamListInfo params, QueryEnvironment *queryEnv, int instrument_options)
Definition: pquery.c:67
void * stringToNode(const char *str)
Definition: read.c:90
void * shm_toc_lookup(shm_toc *toc, uint64 key, bool noError)
Definition: shm_toc.c:232
Snapshot GetActiveSnapshot(void)
Definition: snapmgr.c:805
#define InvalidSnapshot
Definition: snapshot.h:123

References CreateQueryDesc(), GetActiveSnapshot(), InvalidSnapshot, PARALLEL_KEY_PARAMLISTINFO, PARALLEL_KEY_PLANNEDSTMT, PARALLEL_KEY_QUERY_TEXT, RestoreParamList(), shm_toc_lookup(), and stringToNode().

Referenced by ParallelQueryMain().

◆ ExecParallelGetReceiver()

static DestReceiver * ExecParallelGetReceiver ( dsm_segment seg,
shm_toc toc 
)
static

Definition at line 1216 of file execParallel.c.

1217 {
1218  char *mqspace;
1219  shm_mq *mq;
1220 
1221  mqspace = shm_toc_lookup(toc, PARALLEL_KEY_TUPLE_QUEUE, false);
1223  mq = (shm_mq *) mqspace;
1225  return CreateTupleQueueDestReceiver(shm_mq_attach(mq, seg, NULL));
1226 }
int ParallelWorkerNumber
Definition: parallel.c:113
#define PARALLEL_KEY_TUPLE_QUEUE
Definition: execParallel.c:63
shm_mq_handle * shm_mq_attach(shm_mq *mq, dsm_segment *seg, BackgroundWorkerHandle *handle)
Definition: shm_mq.c:291
void shm_mq_set_sender(shm_mq *mq, PGPROC *proc)
Definition: shm_mq.c:225
PGPROC * MyProc
Definition: proc.c:66
Definition: shm_mq.c:73
DestReceiver * CreateTupleQueueDestReceiver(shm_mq_handle *handle)
Definition: tqueue.c:119

References CreateTupleQueueDestReceiver(), MyProc, PARALLEL_KEY_TUPLE_QUEUE, PARALLEL_TUPLE_QUEUE_SIZE, ParallelWorkerNumber, shm_mq_attach(), shm_mq_set_sender(), and shm_toc_lookup().

Referenced by ParallelQueryMain().

◆ ExecParallelInitializeDSM()

static bool ExecParallelInitializeDSM ( PlanState planstate,
ExecParallelInitializeDSMContext d 
)
static

Definition at line 441 of file execParallel.c.

443 {
444  if (planstate == NULL)
445  return false;
446 
447  /* If instrumentation is enabled, initialize slot for this node. */
448  if (d->instrumentation != NULL)
450  planstate->plan->plan_node_id;
451 
452  /* Count this node. */
453  d->nnodes++;
454 
455  /*
456  * Call initializers for DSM-using plan nodes.
457  *
458  * Most plan nodes won't do anything here, but plan nodes that allocated
459  * DSM may need to initialize shared state in the DSM before parallel
460  * workers are launched. They can allocate the space they previously
461  * estimated using shm_toc_allocate, and add the keys they previously
462  * estimated using shm_toc_insert, in each case targeting pcxt->toc.
463  */
464  switch (nodeTag(planstate))
465  {
466  case T_SeqScanState:
467  if (planstate->plan->parallel_aware)
469  d->pcxt);
470  break;
471  case T_IndexScanState:
472  if (planstate->plan->parallel_aware)
474  d->pcxt);
475  break;
476  case T_IndexOnlyScanState:
477  if (planstate->plan->parallel_aware)
479  d->pcxt);
480  break;
481  case T_ForeignScanState:
482  if (planstate->plan->parallel_aware)
484  d->pcxt);
485  break;
486  case T_AppendState:
487  if (planstate->plan->parallel_aware)
488  ExecAppendInitializeDSM((AppendState *) planstate,
489  d->pcxt);
490  break;
491  case T_CustomScanState:
492  if (planstate->plan->parallel_aware)
494  d->pcxt);
495  break;
496  case T_BitmapHeapScanState:
497  if (planstate->plan->parallel_aware)
499  d->pcxt);
500  break;
501  case T_HashJoinState:
502  if (planstate->plan->parallel_aware)
504  d->pcxt);
505  break;
506  case T_HashState:
507  /* even when not parallel-aware, for EXPLAIN ANALYZE */
508  ExecHashInitializeDSM((HashState *) planstate, d->pcxt);
509  break;
510  case T_SortState:
511  /* even when not parallel-aware, for EXPLAIN ANALYZE */
512  ExecSortInitializeDSM((SortState *) planstate, d->pcxt);
513  break;
514  case T_IncrementalSortState:
515  /* even when not parallel-aware, for EXPLAIN ANALYZE */
517  break;
518  case T_AggState:
519  /* even when not parallel-aware, for EXPLAIN ANALYZE */
520  ExecAggInitializeDSM((AggState *) planstate, d->pcxt);
521  break;
522  case T_MemoizeState:
523  /* even when not parallel-aware, for EXPLAIN ANALYZE */
524  ExecMemoizeInitializeDSM((MemoizeState *) planstate, d->pcxt);
525  break;
526  default:
527  break;
528  }
529 
530  return planstate_tree_walker(planstate, ExecParallelInitializeDSM, d);
531 }
void ExecAggInitializeDSM(AggState *node, ParallelContext *pcxt)
Definition: nodeAgg.c:4707
void ExecAppendInitializeDSM(AppendState *node, ParallelContext *pcxt)
Definition: nodeAppend.c:504
void ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node, ParallelContext *pcxt)
void ExecCustomScanInitializeDSM(CustomScanState *node, ParallelContext *pcxt)
Definition: nodeCustom.c:184
void ExecForeignScanInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
void ExecHashInitializeDSM(HashState *node, ParallelContext *pcxt)
Definition: nodeHash.c:2607
void ExecHashJoinInitializeDSM(HashJoinState *state, ParallelContext *pcxt)
void ExecIncrementalSortInitializeDSM(IncrementalSortState *node, ParallelContext *pcxt)
void ExecIndexOnlyScanInitializeDSM(IndexOnlyScanState *node, ParallelContext *pcxt)
void ExecIndexScanInitializeDSM(IndexScanState *node, ParallelContext *pcxt)
void ExecMemoizeInitializeDSM(MemoizeState *node, ParallelContext *pcxt)
Definition: nodeMemoize.c:1180
void ExecSeqScanInitializeDSM(SeqScanState *node, ParallelContext *pcxt)
Definition: nodeSeqscan.c:268
void ExecSortInitializeDSM(SortState *node, ParallelContext *pcxt)
Definition: nodeSort.c:444
int plan_node_id
Definition: plannodes.h:155
int plan_node_id[FLEXIBLE_ARRAY_MEMBER]
Definition: execParallel.c:105

References ExecAggInitializeDSM(), ExecAppendInitializeDSM(), ExecBitmapHeapInitializeDSM(), ExecCustomScanInitializeDSM(), ExecForeignScanInitializeDSM(), ExecHashInitializeDSM(), ExecHashJoinInitializeDSM(), ExecIncrementalSortInitializeDSM(), ExecIndexOnlyScanInitializeDSM(), ExecIndexScanInitializeDSM(), ExecMemoizeInitializeDSM(), ExecSeqScanInitializeDSM(), ExecSortInitializeDSM(), ExecParallelInitializeDSMContext::instrumentation, ExecParallelInitializeDSMContext::nnodes, nodeTag, Plan::parallel_aware, ExecParallelInitializeDSMContext::pcxt, PlanState::plan, SharedExecutorInstrumentation::plan_node_id, Plan::plan_node_id, and planstate_tree_walker.

Referenced by ExecInitParallelPlan().

◆ ExecParallelInitializeWorker()

static bool ExecParallelInitializeWorker ( PlanState planstate,
ParallelWorkerContext pwcxt 
)
static

Definition at line 1305 of file execParallel.c.

1306 {
1307  if (planstate == NULL)
1308  return false;
1309 
1310  switch (nodeTag(planstate))
1311  {
1312  case T_SeqScanState:
1313  if (planstate->plan->parallel_aware)
1314  ExecSeqScanInitializeWorker((SeqScanState *) planstate, pwcxt);
1315  break;
1316  case T_IndexScanState:
1317  if (planstate->plan->parallel_aware)
1319  pwcxt);
1320  break;
1321  case T_IndexOnlyScanState:
1322  if (planstate->plan->parallel_aware)
1324  pwcxt);
1325  break;
1326  case T_ForeignScanState:
1327  if (planstate->plan->parallel_aware)
1329  pwcxt);
1330  break;
1331  case T_AppendState:
1332  if (planstate->plan->parallel_aware)
1333  ExecAppendInitializeWorker((AppendState *) planstate, pwcxt);
1334  break;
1335  case T_CustomScanState:
1336  if (planstate->plan->parallel_aware)
1338  pwcxt);
1339  break;
1340  case T_BitmapHeapScanState:
1341  if (planstate->plan->parallel_aware)
1343  pwcxt);
1344  break;
1345  case T_HashJoinState:
1346  if (planstate->plan->parallel_aware)
1348  pwcxt);
1349  break;
1350  case T_HashState:
1351  /* even when not parallel-aware, for EXPLAIN ANALYZE */
1352  ExecHashInitializeWorker((HashState *) planstate, pwcxt);
1353  break;
1354  case T_SortState:
1355  /* even when not parallel-aware, for EXPLAIN ANALYZE */
1356  ExecSortInitializeWorker((SortState *) planstate, pwcxt);
1357  break;
1358  case T_IncrementalSortState:
1359  /* even when not parallel-aware, for EXPLAIN ANALYZE */
1361  pwcxt);
1362  break;
1363  case T_AggState:
1364  /* even when not parallel-aware, for EXPLAIN ANALYZE */
1365  ExecAggInitializeWorker((AggState *) planstate, pwcxt);
1366  break;
1367  case T_MemoizeState:
1368  /* even when not parallel-aware, for EXPLAIN ANALYZE */
1369  ExecMemoizeInitializeWorker((MemoizeState *) planstate, pwcxt);
1370  break;
1371  default:
1372  break;
1373  }
1374 
1376  pwcxt);
1377 }
static bool ExecParallelInitializeWorker(PlanState *planstate, ParallelWorkerContext *pwcxt)
void ExecAggInitializeWorker(AggState *node, ParallelWorkerContext *pwcxt)
Definition: nodeAgg.c:4732
void ExecAppendInitializeWorker(AppendState *node, ParallelWorkerContext *pwcxt)
Definition: nodeAppend.c:541
void ExecBitmapHeapInitializeWorker(BitmapHeapScanState *node, ParallelWorkerContext *pwcxt)
void ExecCustomScanInitializeWorker(CustomScanState *node, ParallelWorkerContext *pwcxt)
Definition: nodeCustom.c:215
void ExecForeignScanInitializeWorker(ForeignScanState *node, ParallelWorkerContext *pwcxt)
void ExecHashInitializeWorker(HashState *node, ParallelWorkerContext *pwcxt)
Definition: nodeHash.c:2632
void ExecHashJoinInitializeWorker(HashJoinState *state, ParallelWorkerContext *pwcxt)
void ExecIncrementalSortInitializeWorker(IncrementalSortState *node, ParallelWorkerContext *pwcxt)
void ExecIndexOnlyScanInitializeWorker(IndexOnlyScanState *node, ParallelWorkerContext *pwcxt)
void ExecIndexScanInitializeWorker(IndexScanState *node, ParallelWorkerContext *pwcxt)
void ExecMemoizeInitializeWorker(MemoizeState *node, ParallelWorkerContext *pwcxt)
Definition: nodeMemoize.c:1205
void ExecSeqScanInitializeWorker(SeqScanState *node, ParallelWorkerContext *pwcxt)
Definition: nodeSeqscan.c:306
void ExecSortInitializeWorker(SortState *node, ParallelWorkerContext *pwcxt)
Definition: nodeSort.c:469

References ExecAggInitializeWorker(), ExecAppendInitializeWorker(), ExecBitmapHeapInitializeWorker(), ExecCustomScanInitializeWorker(), ExecForeignScanInitializeWorker(), ExecHashInitializeWorker(), ExecHashJoinInitializeWorker(), ExecIncrementalSortInitializeWorker(), ExecIndexOnlyScanInitializeWorker(), ExecIndexScanInitializeWorker(), ExecMemoizeInitializeWorker(), ExecSeqScanInitializeWorker(), ExecSortInitializeWorker(), nodeTag, Plan::parallel_aware, PlanState::plan, and planstate_tree_walker.

Referenced by ParallelQueryMain().

◆ ExecParallelReinitialize()

void ExecParallelReinitialize ( PlanState planstate,
ParallelExecutorInfo pei,
Bitmapset sendParams 
)

Definition at line 900 of file execParallel.c.

903 {
904  EState *estate = planstate->state;
906 
907  /* Old workers must already be shut down */
908  Assert(pei->finished);
909 
910  /*
911  * Force any initplan outputs that we're going to pass to workers to be
912  * evaluated, if they weren't already (see comments in
913  * ExecInitParallelPlan).
914  */
915  ExecSetParamPlanMulti(sendParams, GetPerTupleExprContext(estate));
916 
918  pei->tqueue = ExecParallelSetupTupleQueues(pei->pcxt, true);
919  pei->reader = NULL;
920  pei->finished = false;
921 
922  fpes = shm_toc_lookup(pei->pcxt->toc, PARALLEL_KEY_EXECUTOR_FIXED, false);
923 
924  /* Free any serialized parameters from the last round. */
925  if (DsaPointerIsValid(fpes->param_exec))
926  {
927  dsa_free(pei->area, fpes->param_exec);
929  }
930 
931  /* Serialize current parameter values if required. */
932  if (!bms_is_empty(sendParams))
933  {
934  pei->param_exec = SerializeParamExecParams(estate, sendParams,
935  pei->area);
936  fpes->param_exec = pei->param_exec;
937  }
938 
939  /* Traverse plan tree and let each child node reset associated state. */
940  estate->es_query_dsa = pei->area;
941  ExecParallelReInitializeDSM(planstate, pei->pcxt);
942  estate->es_query_dsa = NULL;
943 }
void ReinitializeParallelDSM(ParallelContext *pcxt)
Definition: parallel.c:486
static bool ExecParallelReInitializeDSM(PlanState *planstate, ParallelContext *pcxt)
Definition: execParallel.c:949
EState * state
Definition: execnodes.h:1037

References ParallelExecutorInfo::area, Assert(), bms_is_empty, dsa_free(), DsaPointerIsValid, EState::es_query_dsa, ExecParallelReInitializeDSM(), ExecParallelSetupTupleQueues(), ExecSetParamPlanMulti(), ParallelExecutorInfo::finished, GetPerTupleExprContext, InvalidDsaPointer, PARALLEL_KEY_EXECUTOR_FIXED, FixedParallelExecutorState::param_exec, ParallelExecutorInfo::param_exec, ParallelExecutorInfo::pcxt, ParallelExecutorInfo::reader, ReinitializeParallelDSM(), SerializeParamExecParams(), shm_toc_lookup(), PlanState::state, ParallelContext::toc, and ParallelExecutorInfo::tqueue.

Referenced by ExecGather(), and ExecGatherMerge().

◆ ExecParallelReInitializeDSM()

static bool ExecParallelReInitializeDSM ( PlanState planstate,
ParallelContext pcxt 
)
static

Definition at line 949 of file execParallel.c.

951 {
952  if (planstate == NULL)
953  return false;
954 
955  /*
956  * Call reinitializers for DSM-using plan nodes.
957  */
958  switch (nodeTag(planstate))
959  {
960  case T_SeqScanState:
961  if (planstate->plan->parallel_aware)
963  pcxt);
964  break;
965  case T_IndexScanState:
966  if (planstate->plan->parallel_aware)
968  pcxt);
969  break;
970  case T_IndexOnlyScanState:
971  if (planstate->plan->parallel_aware)
973  pcxt);
974  break;
975  case T_ForeignScanState:
976  if (planstate->plan->parallel_aware)
978  pcxt);
979  break;
980  case T_AppendState:
981  if (planstate->plan->parallel_aware)
982  ExecAppendReInitializeDSM((AppendState *) planstate, pcxt);
983  break;
984  case T_CustomScanState:
985  if (planstate->plan->parallel_aware)
987  pcxt);
988  break;
989  case T_BitmapHeapScanState:
990  if (planstate->plan->parallel_aware)
992  pcxt);
993  break;
994  case T_HashJoinState:
995  if (planstate->plan->parallel_aware)
997  pcxt);
998  break;
999  case T_HashState:
1000  case T_SortState:
1001  case T_IncrementalSortState:
1002  case T_MemoizeState:
1003  /* these nodes have DSM state, but no reinitialization is required */
1004  break;
1005 
1006  default:
1007  break;
1008  }
1009 
1010  return planstate_tree_walker(planstate, ExecParallelReInitializeDSM, pcxt);
1011 }
void ExecAppendReInitializeDSM(AppendState *node, ParallelContext *pcxt)
Definition: nodeAppend.c:525
void ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node, ParallelContext *pcxt)
void ExecCustomScanReInitializeDSM(CustomScanState *node, ParallelContext *pcxt)
Definition: nodeCustom.c:200
void ExecForeignScanReInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
void ExecHashJoinReInitializeDSM(HashJoinState *state, ParallelContext *pcxt)
void ExecIndexOnlyScanReInitializeDSM(IndexOnlyScanState *node, ParallelContext *pcxt)
void ExecIndexScanReInitializeDSM(IndexScanState *node, ParallelContext *pcxt)
void ExecSeqScanReInitializeDSM(SeqScanState *node, ParallelContext *pcxt)
Definition: nodeSeqscan.c:290

References ExecAppendReInitializeDSM(), ExecBitmapHeapReInitializeDSM(), ExecCustomScanReInitializeDSM(), ExecForeignScanReInitializeDSM(), ExecHashJoinReInitializeDSM(), ExecIndexOnlyScanReInitializeDSM(), ExecIndexScanReInitializeDSM(), ExecSeqScanReInitializeDSM(), nodeTag, Plan::parallel_aware, PlanState::plan, and planstate_tree_walker.

Referenced by ExecParallelReinitialize().

◆ ExecParallelReportInstrumentation()

static bool ExecParallelReportInstrumentation ( PlanState planstate,
SharedExecutorInstrumentation instrumentation 
)
static

Definition at line 1264 of file execParallel.c.

1266 {
1267  int i;
1268  int plan_node_id = planstate->plan->plan_node_id;
1269  Instrumentation *instrument;
1270 
1271  InstrEndLoop(planstate->instrument);
1272 
1273  /*
1274  * If we shuffled the plan_node_id values in ps_instrument into sorted
1275  * order, we could use binary search here. This might matter someday if
1276  * we're pushing down sufficiently large plan trees. For now, do it the
1277  * slow, dumb way.
1278  */
1279  for (i = 0; i < instrumentation->num_plan_nodes; ++i)
1280  if (instrumentation->plan_node_id[i] == plan_node_id)
1281  break;
1282  if (i >= instrumentation->num_plan_nodes)
1283  elog(ERROR, "plan node %d not found", plan_node_id);
1284 
1285  /*
1286  * Add our statistics to the per-node, per-worker totals. It's possible
1287  * that this could happen more than once if we relaunched workers.
1288  */
1289  instrument = GetInstrumentationArray(instrumentation);
1290  instrument += i * instrumentation->num_workers;
1292  Assert(ParallelWorkerNumber < instrumentation->num_workers);
1293  InstrAggNode(&instrument[ParallelWorkerNumber], planstate->instrument);
1294 
1296  instrumentation);
1297 }
static bool ExecParallelReportInstrumentation(PlanState *planstate, SharedExecutorInstrumentation *instrumentation)
#define IsParallelWorker()
Definition: parallel.h:61
void InstrEndLoop(Instrumentation *instr)
Definition: instrument.c:140
void InstrAggNode(Instrumentation *dst, Instrumentation *add)
Definition: instrument.c:169
Instrumentation * instrument
Definition: execnodes.h:1045

References Assert(), elog(), ERROR, GetInstrumentationArray, i, InstrAggNode(), InstrEndLoop(), PlanState::instrument, IsParallelWorker, SharedExecutorInstrumentation::num_plan_nodes, SharedExecutorInstrumentation::num_workers, ParallelWorkerNumber, PlanState::plan, SharedExecutorInstrumentation::plan_node_id, Plan::plan_node_id, and planstate_tree_walker.

Referenced by ParallelQueryMain().

◆ ExecParallelRetrieveInstrumentation()

static bool ExecParallelRetrieveInstrumentation ( PlanState planstate,
SharedExecutorInstrumentation instrumentation 
)
static

Definition at line 1018 of file execParallel.c.

1020 {
1021  Instrumentation *instrument;
1022  int i;
1023  int n;
1024  int ibytes;
1025  int plan_node_id = planstate->plan->plan_node_id;
1026  MemoryContext oldcontext;
1027 
1028  /* Find the instrumentation for this node. */
1029  for (i = 0; i < instrumentation->num_plan_nodes; ++i)
1030  if (instrumentation->plan_node_id[i] == plan_node_id)
1031  break;
1032  if (i >= instrumentation->num_plan_nodes)
1033  elog(ERROR, "plan node %d not found", plan_node_id);
1034 
1035  /* Accumulate the statistics from all workers. */
1036  instrument = GetInstrumentationArray(instrumentation);
1037  instrument += i * instrumentation->num_workers;
1038  for (n = 0; n < instrumentation->num_workers; ++n)
1039  InstrAggNode(planstate->instrument, &instrument[n]);
1040 
1041  /*
1042  * Also store the per-worker detail.
1043  *
1044  * Worker instrumentation should be allocated in the same context as the
1045  * regular instrumentation information, which is the per-query context.
1046  * Switch into per-query memory context.
1047  */
1048  oldcontext = MemoryContextSwitchTo(planstate->state->es_query_cxt);
1049  ibytes = mul_size(instrumentation->num_workers, sizeof(Instrumentation));
1050  planstate->worker_instrument =
1051  palloc(ibytes + offsetof(WorkerInstrumentation, instrument));
1052  MemoryContextSwitchTo(oldcontext);
1053 
1054  planstate->worker_instrument->num_workers = instrumentation->num_workers;
1055  memcpy(&planstate->worker_instrument->instrument, instrument, ibytes);
1056 
1057  /* Perform any node-type-specific work that needs to be done. */
1058  switch (nodeTag(planstate))
1059  {
1060  case T_SortState:
1062  break;
1063  case T_IncrementalSortState:
1065  break;
1066  case T_HashState:
1068  break;
1069  case T_AggState:
1071  break;
1072  case T_MemoizeState:
1074  break;
1075  default:
1076  break;
1077  }
1078 
1080  instrumentation);
1081 }
void ExecAggRetrieveInstrumentation(AggState *node)
Definition: nodeAgg.c:4745
void ExecHashRetrieveInstrumentation(HashState *node)
Definition: nodeHash.c:2673
void ExecIncrementalSortRetrieveInstrumentation(IncrementalSortState *node)
void ExecMemoizeRetrieveInstrumentation(MemoizeState *node)
Definition: nodeMemoize.c:1218
void ExecSortRetrieveInstrumentation(SortState *node)
Definition: nodeSort.c:483
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:138
MemoryContext es_query_cxt
Definition: execnodes.h:660
WorkerInstrumentation * worker_instrument
Definition: execnodes.h:1046
Instrumentation instrument[FLEXIBLE_ARRAY_MEMBER]
Definition: instrument.h:96

References elog(), ERROR, EState::es_query_cxt, ExecAggRetrieveInstrumentation(), ExecHashRetrieveInstrumentation(), ExecIncrementalSortRetrieveInstrumentation(), ExecMemoizeRetrieveInstrumentation(), ExecSortRetrieveInstrumentation(), GetInstrumentationArray, i, InstrAggNode(), WorkerInstrumentation::instrument, PlanState::instrument, MemoryContextSwitchTo(), mul_size(), nodeTag, SharedExecutorInstrumentation::num_plan_nodes, SharedExecutorInstrumentation::num_workers, WorkerInstrumentation::num_workers, palloc(), PlanState::plan, SharedExecutorInstrumentation::plan_node_id, Plan::plan_node_id, planstate_tree_walker, PlanState::state, and PlanState::worker_instrument.

Referenced by ExecParallelCleanup().

◆ ExecParallelRetrieveJitInstrumentation()

static void ExecParallelRetrieveJitInstrumentation ( PlanState planstate,
SharedJitInstrumentation shared_jit 
)
static

Definition at line 1087 of file execParallel.c.

1089 {
1090  JitInstrumentation *combined;
1091  int ibytes;
1092 
1093  int n;
1094 
1095  /*
1096  * Accumulate worker JIT instrumentation into the combined JIT
1097  * instrumentation, allocating it if required.
1098  */
1099  if (!planstate->state->es_jit_worker_instr)
1100  planstate->state->es_jit_worker_instr =
1102  combined = planstate->state->es_jit_worker_instr;
1103 
1104  /* Accumulate all the workers' instrumentations. */
1105  for (n = 0; n < shared_jit->num_workers; ++n)
1106  InstrJitAgg(combined, &shared_jit->jit_instr[n]);
1107 
1108  /*
1109  * Store the per-worker detail.
1110  *
1111  * Similar to ExecParallelRetrieveInstrumentation(), allocate the
1112  * instrumentation in per-query context.
1113  */
1114  ibytes = offsetof(SharedJitInstrumentation, jit_instr)
1115  + mul_size(shared_jit->num_workers, sizeof(JitInstrumentation));
1116  planstate->worker_jit_instrument =
1117  MemoryContextAlloc(planstate->state->es_query_cxt, ibytes);
1118 
1119  memcpy(planstate->worker_jit_instrument, shared_jit, ibytes);
1120 }
void InstrJitAgg(JitInstrumentation *dst, JitInstrumentation *add)
Definition: jit.c:184
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:1048
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:1005
struct JitInstrumentation * es_jit_worker_instr
Definition: execnodes.h:707
struct SharedJitInstrumentation * worker_jit_instrument
Definition: execnodes.h:1049

References EState::es_jit_worker_instr, EState::es_query_cxt, InstrJitAgg(), SharedJitInstrumentation::jit_instr, MemoryContextAlloc(), MemoryContextAllocZero(), mul_size(), SharedJitInstrumentation::num_workers, PlanState::state, and PlanState::worker_jit_instrument.

Referenced by ExecParallelCleanup().

◆ ExecParallelSetupTupleQueues()

static shm_mq_handle ** ExecParallelSetupTupleQueues ( ParallelContext pcxt,
bool  reinitialize 
)
static

Definition at line 538 of file execParallel.c.

539 {
540  shm_mq_handle **responseq;
541  char *tqueuespace;
542  int i;
543 
544  /* Skip this if no workers. */
545  if (pcxt->nworkers == 0)
546  return NULL;
547 
548  /* Allocate memory for shared memory queue handles. */
549  responseq = (shm_mq_handle **)
550  palloc(pcxt->nworkers * sizeof(shm_mq_handle *));
551 
552  /*
553  * If not reinitializing, allocate space from the DSM for the queues;
554  * otherwise, find the already allocated space.
555  */
556  if (!reinitialize)
557  tqueuespace =
558  shm_toc_allocate(pcxt->toc,
560  pcxt->nworkers));
561  else
562  tqueuespace = shm_toc_lookup(pcxt->toc, PARALLEL_KEY_TUPLE_QUEUE, false);
563 
564  /* Create the queues, and become the receiver for each. */
565  for (i = 0; i < pcxt->nworkers; ++i)
566  {
567  shm_mq *mq;
568 
569  mq = shm_mq_create(tqueuespace +
572 
574  responseq[i] = shm_mq_attach(mq, pcxt->seg, NULL);
575  }
576 
577  /* Add array of queues to shm_toc, so others can find it. */
578  if (!reinitialize)
579  shm_toc_insert(pcxt->toc, PARALLEL_KEY_TUPLE_QUEUE, tqueuespace);
580 
581  /* Return array of handles. */
582  return responseq;
583 }
shm_mq * shm_mq_create(void *address, Size size)
Definition: shm_mq.c:178
void shm_mq_set_receiver(shm_mq *mq, PGPROC *proc)
Definition: shm_mq.c:207

References i, mul_size(), MyProc, ParallelContext::nworkers, palloc(), PARALLEL_KEY_TUPLE_QUEUE, PARALLEL_TUPLE_QUEUE_SIZE, ParallelContext::seg, shm_mq_attach(), shm_mq_create(), shm_mq_set_receiver(), shm_toc_allocate(), shm_toc_insert(), shm_toc_lookup(), and ParallelContext::toc.

Referenced by ExecInitParallelPlan(), and ExecParallelReinitialize().

◆ ExecSerializePlan()

static char * ExecSerializePlan ( Plan plan,
EState estate 
)
static

Definition at line 147 of file execParallel.c.

148 {
149  PlannedStmt *pstmt;
150  ListCell *lc;
151 
152  /* We can't scribble on the original plan, so make a copy. */
153  plan = copyObject(plan);
154 
155  /*
156  * The worker will start its own copy of the executor, and that copy will
157  * insert a junk filter if the toplevel node has any resjunk entries. We
158  * don't want that to happen, because while resjunk columns shouldn't be
159  * sent back to the user, here the tuples are coming back to another
160  * backend which may very well need them. So mutate the target list
161  * accordingly. This is sort of a hack; there might be better ways to do
162  * this...
163  */
164  foreach(lc, plan->targetlist)
165  {
166  TargetEntry *tle = lfirst_node(TargetEntry, lc);
167 
168  tle->resjunk = false;
169  }
170 
171  /*
172  * Create a dummy PlannedStmt. Most of the fields don't need to be valid
173  * for our purposes, but the worker will need at least a minimal
174  * PlannedStmt to start the executor.
175  */
176  pstmt = makeNode(PlannedStmt);
177  pstmt->commandType = CMD_SELECT;
178  pstmt->queryId = pgstat_get_my_query_id();
179  pstmt->hasReturning = false;
180  pstmt->hasModifyingCTE = false;
181  pstmt->canSetTag = true;
182  pstmt->transientPlan = false;
183  pstmt->dependsOnRole = false;
184  pstmt->parallelModeNeeded = false;
185  pstmt->planTree = plan;
186  pstmt->partPruneInfos = estate->es_part_prune_infos;
187  pstmt->rtable = estate->es_range_table;
188  pstmt->permInfos = estate->es_rteperminfos;
189  pstmt->resultRelations = NIL;
190  pstmt->appendRelations = NIL;
191 
192  /*
193  * Transfer only parallel-safe subplans, leaving a NULL "hole" in the list
194  * for unsafe ones (so that the list indexes of the safe ones are
195  * preserved). This positively ensures that the worker won't try to run,
196  * or even do ExecInitNode on, an unsafe subplan. That's important to
197  * protect, eg, non-parallel-aware FDWs from getting into trouble.
198  */
199  pstmt->subplans = NIL;
200  foreach(lc, estate->es_plannedstmt->subplans)
201  {
202  Plan *subplan = (Plan *) lfirst(lc);
203 
204  if (subplan && !subplan->parallel_safe)
205  subplan = NULL;
206  pstmt->subplans = lappend(pstmt->subplans, subplan);
207  }
208 
209  pstmt->rewindPlanIDs = NULL;
210  pstmt->rowMarks = NIL;
211  pstmt->relationOids = NIL;
212  pstmt->invalItems = NIL; /* workers can't replan anyway... */
213  pstmt->paramExecTypes = estate->es_plannedstmt->paramExecTypes;
214  pstmt->utilityStmt = NULL;
215  pstmt->stmt_location = -1;
216  pstmt->stmt_len = -1;
217 
218  /* Return serialized copy of our dummy PlannedStmt. */
219  return nodeToString(pstmt);
220 }
uint64 pgstat_get_my_query_id(void)
List * lappend(List *list, void *datum)
Definition: list.c:338
#define copyObject(obj)
Definition: nodes.h:244
@ CMD_SELECT
Definition: nodes.h:276
#define makeNode(_type_)
Definition: nodes.h:176
char * nodeToString(const void *obj)
Definition: outfuncs.c:877
#define lfirst(lc)
Definition: pg_list.h:172
#define lfirst_node(type, lc)
Definition: pg_list.h:176
#define NIL
Definition: pg_list.h:68
List * es_part_prune_infos
Definition: execnodes.h:626
List * es_range_table
Definition: execnodes.h:618
List * es_rteperminfos
Definition: execnodes.h:624
bool parallel_safe
Definition: plannodes.h:145
List * targetlist
Definition: plannodes.h:156
struct Plan * planTree
Definition: plannodes.h:71
bool hasModifyingCTE
Definition: plannodes.h:59
List * appendRelations
Definition: plannodes.h:84
List * permInfos
Definition: plannodes.h:78
bool canSetTag
Definition: plannodes.h:61
List * rowMarks
Definition: plannodes.h:91
int stmt_location
Definition: plannodes.h:102
int stmt_len
Definition: plannodes.h:103
Bitmapset * rewindPlanIDs
Definition: plannodes.h:89
bool hasReturning
Definition: plannodes.h:57
List * invalItems
Definition: plannodes.h:95
bool transientPlan
Definition: plannodes.h:63
List * resultRelations
Definition: plannodes.h:82
List * subplans
Definition: plannodes.h:86
List * relationOids
Definition: plannodes.h:93
bool dependsOnRole
Definition: plannodes.h:65
CmdType commandType
Definition: plannodes.h:53
Node * utilityStmt
Definition: plannodes.h:99
List * rtable
Definition: plannodes.h:76
List * partPruneInfos
Definition: plannodes.h:73
bool parallelModeNeeded
Definition: plannodes.h:67
uint64 queryId
Definition: plannodes.h:55

References PlannedStmt::appendRelations, PlannedStmt::canSetTag, CMD_SELECT, PlannedStmt::commandType, copyObject, PlannedStmt::dependsOnRole, EState::es_part_prune_infos, EState::es_plannedstmt, EState::es_range_table, EState::es_rteperminfos, PlannedStmt::hasModifyingCTE, PlannedStmt::hasReturning, PlannedStmt::invalItems, lappend(), lfirst, lfirst_node, makeNode, NIL, nodeToString(), Plan::parallel_safe, PlannedStmt::parallelModeNeeded, PlannedStmt::paramExecTypes, PlannedStmt::partPruneInfos, PlannedStmt::permInfos, pgstat_get_my_query_id(), PlannedStmt::planTree, PlannedStmt::queryId, PlannedStmt::relationOids, PlannedStmt::resultRelations, PlannedStmt::rewindPlanIDs, PlannedStmt::rowMarks, PlannedStmt::rtable, PlannedStmt::stmt_len, PlannedStmt::stmt_location, PlannedStmt::subplans, Plan::targetlist, PlannedStmt::transientPlan, and PlannedStmt::utilityStmt.

Referenced by ExecInitParallelPlan().

◆ ParallelQueryMain()

void ParallelQueryMain ( dsm_segment seg,
shm_toc toc 
)

Definition at line 1396 of file execParallel.c.

1397 {
1399  BufferUsage *buffer_usage;
1400  WalUsage *wal_usage;
1401  DestReceiver *receiver;
1402  QueryDesc *queryDesc;
1403  SharedExecutorInstrumentation *instrumentation;
1404  SharedJitInstrumentation *jit_instrumentation;
1405  int instrument_options = 0;
1406  void *area_space;
1407  dsa_area *area;
1408  ParallelWorkerContext pwcxt;
1409 
1410  /* Get fixed-size state. */
1411  fpes = shm_toc_lookup(toc, PARALLEL_KEY_EXECUTOR_FIXED, false);
1412 
1413  /* Set up DestReceiver, SharedExecutorInstrumentation, and QueryDesc. */
1414  receiver = ExecParallelGetReceiver(seg, toc);
1415  instrumentation = shm_toc_lookup(toc, PARALLEL_KEY_INSTRUMENTATION, true);
1416  if (instrumentation != NULL)
1417  instrument_options = instrumentation->instrument_options;
1418  jit_instrumentation = shm_toc_lookup(toc, PARALLEL_KEY_JIT_INSTRUMENTATION,
1419  true);
1420  queryDesc = ExecParallelGetQueryDesc(toc, receiver, instrument_options);
1421 
1422  /* Setting debug_query_string for individual workers */
1423  debug_query_string = queryDesc->sourceText;
1424 
1425  /* Report workers' query for monitoring purposes */
1427 
1428  /* Attach to the dynamic shared memory area. */
1429  area_space = shm_toc_lookup(toc, PARALLEL_KEY_DSA, false);
1430  area = dsa_attach_in_place(area_space, seg);
1431 
1432  /* Start up the executor */
1433  queryDesc->plannedstmt->jitFlags = fpes->jit_flags;
1434  ExecutorStart(queryDesc, fpes->eflags);
1435 
1436  /* Special executor initialization steps for parallel workers */
1437  queryDesc->planstate->state->es_query_dsa = area;
1438  if (DsaPointerIsValid(fpes->param_exec))
1439  {
1440  char *paramexec_space;
1441 
1442  paramexec_space = dsa_get_address(area, fpes->param_exec);
1443  RestoreParamExecParams(paramexec_space, queryDesc->estate);
1444  }
1445  pwcxt.toc = toc;
1446  pwcxt.seg = seg;
1447  ExecParallelInitializeWorker(queryDesc->planstate, &pwcxt);
1448 
1449  /* Pass down any tuple bound */
1450  ExecSetTupleBound(fpes->tuples_needed, queryDesc->planstate);
1451 
1452  /*
1453  * Prepare to track buffer/WAL usage during query execution.
1454  *
1455  * We do this after starting up the executor to match what happens in the
1456  * leader, which also doesn't count buffer accesses and WAL activity that
1457  * occur during executor startup.
1458  */
1460 
1461  /*
1462  * Run the plan. If we specified a tuple bound, be careful not to demand
1463  * more tuples than that.
1464  */
1465  ExecutorRun(queryDesc,
1467  fpes->tuples_needed < 0 ? (int64) 0 : fpes->tuples_needed,
1468  true);
1469 
1470  /* Shut down the executor */
1471  ExecutorFinish(queryDesc);
1472 
1473  /* Report buffer/WAL usage during parallel execution. */
1474  buffer_usage = shm_toc_lookup(toc, PARALLEL_KEY_BUFFER_USAGE, false);
1475  wal_usage = shm_toc_lookup(toc, PARALLEL_KEY_WAL_USAGE, false);
1477  &wal_usage[ParallelWorkerNumber]);
1478 
1479  /* Report instrumentation data if any instrumentation options are set. */
1480  if (instrumentation != NULL)
1482  instrumentation);
1483 
1484  /* Report JIT instrumentation data if any */
1485  if (queryDesc->estate->es_jit && jit_instrumentation != NULL)
1486  {
1487  Assert(ParallelWorkerNumber < jit_instrumentation->num_workers);
1488  jit_instrumentation->jit_instr[ParallelWorkerNumber] =
1489  queryDesc->estate->es_jit->instr;
1490  }
1491 
1492  /* Must do this after capturing instrumentation. */
1493  ExecutorEnd(queryDesc);
1494 
1495  /* Cleanup. */
1496  dsa_detach(area);
1497  FreeQueryDesc(queryDesc);
1498  receiver->rDestroy(receiver);
1499 }
void pgstat_report_activity(BackendState state, const char *cmd_str)
@ STATE_RUNNING
void * dsa_get_address(dsa_area *area, dsa_pointer dp)
Definition: dsa.c:944
dsa_area * dsa_attach_in_place(void *place, dsm_segment *segment)
Definition: dsa.c:553
void ExecutorEnd(QueryDesc *queryDesc)
Definition: execMain.c:462
void ExecutorFinish(QueryDesc *queryDesc)
Definition: execMain.c:402
void ExecutorStart(QueryDesc *queryDesc, int eflags)
Definition: execMain.c:132
void ExecutorRun(QueryDesc *queryDesc, ScanDirection direction, uint64 count, bool execute_once)
Definition: execMain.c:301
static DestReceiver * ExecParallelGetReceiver(dsm_segment *seg, shm_toc *toc)
static QueryDesc * ExecParallelGetQueryDesc(shm_toc *toc, DestReceiver *receiver, int instrument_options)
static void RestoreParamExecParams(char *start_address, EState *estate)
Definition: execParallel.c:412
void ExecSetTupleBound(int64 tuples_needed, PlanState *child_node)
Definition: execProcnode.c:849
void InstrEndParallelQuery(BufferUsage *bufusage, WalUsage *walusage)
Definition: instrument.c:208
void InstrStartParallelQuery(void)
Definition: instrument.c:200
const char * debug_query_string
Definition: postgres.c:81
void FreeQueryDesc(QueryDesc *qdesc)
Definition: pquery.c:105
@ ForwardScanDirection
Definition: sdir.h:28
struct JitContext * es_jit
Definition: execnodes.h:706
JitInstrumentation instr
Definition: jit.h:61
dsm_segment * seg
Definition: parallel.h:53
int jitFlags
Definition: plannodes.h:69
const char * sourceText
Definition: execdesc.h:38
EState * estate
Definition: execdesc.h:48
PlannedStmt * plannedstmt
Definition: execdesc.h:37
PlanState * planstate
Definition: execdesc.h:49
void(* rDestroy)(DestReceiver *self)
Definition: dest.h:125
Definition: dsa.c:367

References Assert(), debug_query_string, dsa_attach_in_place(), dsa_detach(), dsa_get_address(), DsaPointerIsValid, FixedParallelExecutorState::eflags, EState::es_jit, EState::es_query_dsa, QueryDesc::estate, ExecParallelGetQueryDesc(), ExecParallelGetReceiver(), ExecParallelInitializeWorker(), ExecParallelReportInstrumentation(), ExecSetTupleBound(), ExecutorEnd(), ExecutorFinish(), ExecutorRun(), ExecutorStart(), ForwardScanDirection, FreeQueryDesc(), JitContext::instr, InstrEndParallelQuery(), InstrStartParallelQuery(), SharedExecutorInstrumentation::instrument_options, FixedParallelExecutorState::jit_flags, SharedJitInstrumentation::jit_instr, PlannedStmt::jitFlags, PARALLEL_KEY_BUFFER_USAGE, PARALLEL_KEY_DSA, PARALLEL_KEY_EXECUTOR_FIXED, PARALLEL_KEY_INSTRUMENTATION, PARALLEL_KEY_JIT_INSTRUMENTATION, PARALLEL_KEY_WAL_USAGE, ParallelWorkerNumber, FixedParallelExecutorState::param_exec, pgstat_report_activity(), QueryDesc::plannedstmt, QueryDesc::planstate, _DestReceiver::rDestroy, RestoreParamExecParams(), ParallelWorkerContext::seg, shm_toc_lookup(), QueryDesc::sourceText, PlanState::state, STATE_RUNNING, ParallelWorkerContext::toc, and FixedParallelExecutorState::tuples_needed.

◆ RestoreParamExecParams()

static void RestoreParamExecParams ( char *  start_address,
EState estate 
)
static

Definition at line 412 of file execParallel.c.

413 {
414  int nparams;
415  int i;
416  int paramid;
417 
418  memcpy(&nparams, start_address, sizeof(int));
419  start_address += sizeof(int);
420 
421  for (i = 0; i < nparams; i++)
422  {
423  ParamExecData *prm;
424 
425  /* Read paramid */
426  memcpy(&paramid, start_address, sizeof(int));
427  start_address += sizeof(int);
428  prm = &(estate->es_param_exec_vals[paramid]);
429 
430  /* Read datum/isnull. */
431  prm->value = datumRestore(&start_address, &prm->isnull);
432  prm->execPlan = NULL;
433  }
434 }
Datum datumRestore(char **start_address, bool *isnull)
Definition: datum.c:521
void * execPlan
Definition: params.h:148

References datumRestore(), EState::es_param_exec_vals, ParamExecData::execPlan, i, ParamExecData::isnull, and ParamExecData::value.

Referenced by ParallelQueryMain().

◆ SerializeParamExecParams()

static dsa_pointer SerializeParamExecParams ( EState estate,
Bitmapset params,
dsa_area area 
)
static

Definition at line 357 of file execParallel.c.

358 {
359  Size size;
360  int nparams;
361  int paramid;
362  ParamExecData *prm;
363  dsa_pointer handle;
364  char *start_address;
365 
366  /* Allocate enough space for the current parameter values. */
367  size = EstimateParamExecSpace(estate, params);
368  handle = dsa_allocate(area, size);
369  start_address = dsa_get_address(area, handle);
370 
371  /* First write the number of parameters as a 4-byte integer. */
372  nparams = bms_num_members(params);
373  memcpy(start_address, &nparams, sizeof(int));
374  start_address += sizeof(int);
375 
376  /* Write details for each parameter in turn. */
377  paramid = -1;
378  while ((paramid = bms_next_member(params, paramid)) >= 0)
379  {
380  Oid typeOid;
381  int16 typLen;
382  bool typByVal;
383 
384  prm = &(estate->es_param_exec_vals[paramid]);
385  typeOid = list_nth_oid(estate->es_plannedstmt->paramExecTypes,
386  paramid);
387 
388  /* Write paramid. */
389  memcpy(start_address, &paramid, sizeof(int));
390  start_address += sizeof(int);
391 
392  /* Write datum/isnull */
393  if (OidIsValid(typeOid))
394  get_typlenbyval(typeOid, &typLen, &typByVal);
395  else
396  {
397  /* If no type OID, assume by-value, like copyParamList does. */
398  typLen = sizeof(Datum);
399  typByVal = true;
400  }
401  datumSerialize(prm->value, prm->isnull, typByVal, typLen,
402  &start_address);
403  }
404 
405  return handle;
406 }
int bms_num_members(const Bitmapset *a)
Definition: bitmapset.c:665
void datumSerialize(Datum value, bool isnull, bool typByVal, int typLen, char **start_address)
Definition: datum.c:459
uint64 dsa_pointer
Definition: dsa.h:62
#define dsa_allocate(area, size)
Definition: dsa.h:84
static Size EstimateParamExecSpace(EState *estate, Bitmapset *params)
Definition: execParallel.c:313

References bms_next_member(), bms_num_members(), datumSerialize(), dsa_allocate, dsa_get_address(), EState::es_param_exec_vals, EState::es_plannedstmt, EstimateParamExecSpace(), get_typlenbyval(), ParamExecData::isnull, list_nth_oid(), OidIsValid, PlannedStmt::paramExecTypes, and ParamExecData::value.

Referenced by ExecInitParallelPlan(), and ExecParallelReinitialize().