wait_event.h File Reference

#include "utils/wait_event_types.h"

Include dependency graph for wait_event.h:

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Go to the source code of this file.

Functions
const char *	pgstat_get_wait_event (uint32 wait_event_info)
const char *	pgstat_get_wait_event_type (uint32 wait_event_info)
static void	pgstat_report_wait_start (uint32 wait_event_info)
static void	pgstat_report_wait_end (void)
void	pgstat_set_wait_event_storage (uint32 *wait_event_info)
void	pgstat_reset_wait_event_storage (void)
uint32	WaitEventExtensionNew (const char *wait_event_name)
uint32	WaitEventInjectionPointNew (const char *wait_event_name)
char **	GetWaitEventCustomNames (uint32 classId, int *nwaitevents)

Variables
PGDLLIMPORT uint32 *	my_wait_event_info

Function Documentation

GetWaitEventCustomNames()

char ** GetWaitEventCustomNames ( uint32  classId, int *  nwaitevents  )

extern

Definition at line 292 of file wait_event.c.

{
    char      **waiteventnames;
    WaitEventCustomEntryByName *hentry;
    HASH_SEQ_STATUS hash_seq;
    int         index;
    int         els;
 
    LWLockAcquire(WaitEventCustomLock, LW_SHARED);
 
    /* Now we can safely count the number of entries */
    els = hash_get_num_entries(WaitEventCustomHashByName);
 
    /* Allocate enough space for all entries */
    waiteventnames = palloc_array(char *, els);
 
    /* Now scan the hash table to copy the data */
    hash_seq_init(&hash_seq, WaitEventCustomHashByName);
 
    index = 0;
    while ((hentry = (WaitEventCustomEntryByName *) hash_seq_search(&hash_seq)) != NULL)
    {
        if ((hentry->wait_event_info & WAIT_EVENT_CLASS_MASK) != classId)
            continue;
        waiteventnames[index] = pstrdup(hentry->wait_event_name);
        index++;
    }
 
    LWLockRelease(WaitEventCustomLock);
 
    *nwaitevents = index;
    return waiteventnames;
}

References fb(), hash_get_num_entries(), hash_seq_init(), hash_seq_search(), LW_SHARED, LWLockAcquire(), LWLockRelease(), palloc_array, pstrdup(), WAIT_EVENT_CLASS_MASK, and WaitEventCustomHashByName.

Referenced by pg_get_wait_events().

pgstat_get_wait_event()

const char * pgstat_get_wait_event ( uint32  wait_event_info )

extern

Definition at line 417 of file wait_event.c.

{
    uint32      classId;
    uint16      eventId;
    const char *event_name;
 
    /* report process as not waiting. */
    if (wait_event_info == 0)
        return NULL;
 
    classId = wait_event_info & WAIT_EVENT_CLASS_MASK;
    eventId = wait_event_info & WAIT_EVENT_ID_MASK;
 
    switch (classId)
    {
        case PG_WAIT_LWLOCK:
            event_name = GetLWLockIdentifier(classId, eventId);
            break;
        case PG_WAIT_LOCK:
            event_name = GetLockNameFromTagType(eventId);
            break;
        case PG_WAIT_EXTENSION:
        case PG_WAIT_INJECTIONPOINT:
            event_name = GetWaitEventCustomIdentifier(wait_event_info);
            break;
        case PG_WAIT_BUFFER:
            {
                WaitEventBuffer w = (WaitEventBuffer) wait_event_info;
 
                event_name = pgstat_get_wait_buffer(w);
                break;
            }
        case PG_WAIT_ACTIVITY:
            {
                WaitEventActivity w = (WaitEventActivity) wait_event_info;
 
                event_name = pgstat_get_wait_activity(w);
                break;
            }
        case PG_WAIT_CLIENT:
            {
                WaitEventClient w = (WaitEventClient) wait_event_info;
 
                event_name = pgstat_get_wait_client(w);
                break;
            }
        case PG_WAIT_IPC:
            {
                WaitEventIPC w = (WaitEventIPC) wait_event_info;
 
                event_name = pgstat_get_wait_ipc(w);
                break;
            }
        case PG_WAIT_TIMEOUT:
            {
                WaitEventTimeout w = (WaitEventTimeout) wait_event_info;
 
                event_name = pgstat_get_wait_timeout(w);
                break;
            }
        case PG_WAIT_IO:
            {
                WaitEventIO w = (WaitEventIO) wait_event_info;
 
                event_name = pgstat_get_wait_io(w);
                break;
            }
        default:
            event_name = "unknown wait event";
            break;
    }
 
    return event_name;
}

References fb(), GetLockNameFromTagType(), GetLWLockIdentifier(), GetWaitEventCustomIdentifier(), PG_WAIT_ACTIVITY, PG_WAIT_BUFFER, PG_WAIT_CLIENT, PG_WAIT_EXTENSION, PG_WAIT_INJECTIONPOINT, PG_WAIT_IO, PG_WAIT_IPC, PG_WAIT_LOCK, PG_WAIT_LWLOCK, PG_WAIT_TIMEOUT, pgstat_get_wait_activity(), pgstat_get_wait_buffer(), pgstat_get_wait_client(), pgstat_get_wait_io(), pgstat_get_wait_ipc(), pgstat_get_wait_timeout(), WAIT_EVENT_CLASS_MASK, and WAIT_EVENT_ID_MASK.

Referenced by pg_stat_get_activity(), and pg_stat_get_backend_wait_event().

pgstat_get_wait_event_type()

const char * pgstat_get_wait_event_type ( uint32  wait_event_info )

extern

Definition at line 359 of file wait_event.c.

{
    uint32      classId;
    const char *event_type;
 
    /* report process as not waiting. */
    if (wait_event_info == 0)
        return NULL;
 
    classId = wait_event_info & WAIT_EVENT_CLASS_MASK;
 
    switch (classId)
    {
        case PG_WAIT_LWLOCK:
            event_type = "LWLock";
            break;
        case PG_WAIT_LOCK:
            event_type = "Lock";
            break;
        case PG_WAIT_BUFFER:
            event_type = "Buffer";
            break;
        case PG_WAIT_ACTIVITY:
            event_type = "Activity";
            break;
        case PG_WAIT_CLIENT:
            event_type = "Client";
            break;
        case PG_WAIT_EXTENSION:
            event_type = "Extension";
            break;
        case PG_WAIT_IPC:
            event_type = "IPC";
            break;
        case PG_WAIT_TIMEOUT:
            event_type = "Timeout";
            break;
        case PG_WAIT_IO:
            event_type = "IO";
            break;
        case PG_WAIT_INJECTIONPOINT:
            event_type = "InjectionPoint";
            break;
        default:
            event_type = "???";
            break;
    }
 
    return event_type;
}

References fb(), PG_WAIT_ACTIVITY, PG_WAIT_BUFFER, PG_WAIT_CLIENT, PG_WAIT_EXTENSION, PG_WAIT_INJECTIONPOINT, PG_WAIT_IO, PG_WAIT_IPC, PG_WAIT_LOCK, PG_WAIT_LWLOCK, PG_WAIT_TIMEOUT, and WAIT_EVENT_CLASS_MASK.

Referenced by pg_isolation_test_session_is_blocked(), pg_stat_get_activity(), pg_stat_get_backend_wait_event_type(), and WaitEventCustomNew().

pgstat_report_wait_end()

static void pgstat_report_wait_end ( void  )

inlinestatic

Definition at line 83 of file wait_event.h.

{
    /* see pgstat_report_wait_start() */
    *(volatile uint32 *) my_wait_event_info = 0;
}

References my_wait_event_info.

Referenced by AbortSubTransaction(), AbortTransaction(), AddToDataDirLockFile(), ApplyLogicalMappingFile(), assign_wal_sync_method(), AutoVacLauncherMain(), BackgroundWriterMain(), basebackup_read_file(), BootStrapXLOG(), BufferLockAcquire(), CheckpointerMain(), CheckPointLogicalRewriteHeap(), clone_file(), copy_file(), CopyGetData(), CopySendEndOfRow(), CreateCheckPoint(), CreateDirAndVersionFile(), CreateLockFile(), dsm_impl_mmap(), dsm_impl_posix_resize(), ExecuteRecoveryCommand(), FileFallocate(), FilePrefetch(), FileReadV(), FileSync(), FileTruncate(), FileWriteback(), FileWriteV(), FileZero(), heap_xlog_logical_rewrite(), issue_xlog_fsync(), LWLockReportWaitEnd(), perform_spin_delay(), pgaio_io_perform_synchronously(), pgarch_archiveXlog(), ProcArrayGroupClearXid(), read_relmap_file(), ReadControlFile(), readTimeLineHistory(), ReadTwoPhaseFile(), RecheckDataDirLockFile(), RecreateTwoPhaseFile(), ReorderBufferSerializeChange(), RestoreArchivedFile(), RestoreSlotFromDisk(), SaveSlotToPath(), SendTimeLineHistory(), shell_archive_file(), ShutdownAuxiliaryProcess(), SlruPhysicalReadPage(), SlruPhysicalWritePage(), SlruSyncFileTag(), SnapBuildRestoreContents(), SnapBuildSerialize(), TransactionGroupUpdateXidStatus(), update_controlfile(), vacuum_delay_point(), WaitEventSetWait(), WaitExceedsMaxStandbyDelay(), WALRead(), WalSndErrorCleanup(), WalSummarizerMain(), WalWriterMain(), write_relmap_file(), WriteControlFile(), writeTimeLineHistory(), writeTimeLineHistoryFile(), XLogFileCopy(), XLogFileInitInternal(), XLogFlush(), XLogPageRead(), XLogWalRcvWrite(), and XLogWrite().

pgstat_report_wait_start()

static void pgstat_report_wait_start ( uint32  wait_event_info )

inlinestatic

Definition at line 67 of file wait_event.h.

{
    /*
     * Since this is a four-byte field which is always read and written as
     * four-bytes, updates are atomic.
     */
    *(volatile uint32 *) my_wait_event_info = wait_event_info;
}

References my_wait_event_info.

Referenced by AddToDataDirLockFile(), ApplyLogicalMappingFile(), assign_wal_sync_method(), basebackup_read_file(), BootStrapXLOG(), BufferLockAcquire(), CheckPointLogicalRewriteHeap(), clone_file(), copy_file(), CopyGetData(), CopySendEndOfRow(), CreateCheckPoint(), CreateDirAndVersionFile(), CreateLockFile(), dsm_impl_mmap(), dsm_impl_posix_resize(), ExecuteRecoveryCommand(), FileFallocate(), FilePrefetch(), FileReadV(), FileSync(), FileTruncate(), FileWriteback(), FileWriteV(), FileZero(), heap_xlog_logical_rewrite(), issue_xlog_fsync(), LWLockReportWaitStart(), perform_spin_delay(), pgaio_io_perform_synchronously(), ProcArrayGroupClearXid(), read_relmap_file(), ReadControlFile(), readTimeLineHistory(), ReadTwoPhaseFile(), RecheckDataDirLockFile(), RecreateTwoPhaseFile(), ReorderBufferSerializeChange(), RestoreArchivedFile(), RestoreSlotFromDisk(), SaveSlotToPath(), SendTimeLineHistory(), shell_archive_file(), SlruPhysicalReadPage(), SlruPhysicalWritePage(), SlruSyncFileTag(), SnapBuildRestoreContents(), SnapBuildSerialize(), TransactionGroupUpdateXidStatus(), update_controlfile(), vacuum_delay_point(), WaitEventSetWait(), WaitExceedsMaxStandbyDelay(), WALRead(), write_relmap_file(), WriteControlFile(), writeTimeLineHistory(), writeTimeLineHistoryFile(), XLogFileCopy(), XLogFileInitInternal(), XLogFlush(), XLogPageRead(), XLogWalRcvWrite(), and XLogWrite().

pgstat_reset_wait_event_storage()

void pgstat_reset_wait_event_storage ( void  )

extern

Definition at line 347 of file wait_event.c.

{
    my_wait_event_info = &local_my_wait_event_info;
}

References local_my_wait_event_info, and my_wait_event_info.

Referenced by AuxiliaryProcKill(), and ProcKill().

pgstat_set_wait_event_storage()

void pgstat_set_wait_event_storage ( uint32 *  wait_event_info )

extern

Definition at line 335 of file wait_event.c.

{
    my_wait_event_info = wait_event_info;
}

References my_wait_event_info.

Referenced by InitAuxiliaryProcess(), and InitProcess().

WaitEventExtensionNew()

uint32 WaitEventExtensionNew ( const char *  wait_event_name )

extern

Definition at line 149 of file wait_event.c.

{
    return WaitEventCustomNew(PG_WAIT_EXTENSION, wait_event_name);
}

References PG_WAIT_EXTENSION, and WaitEventCustomNew().

Referenced by connect_pg_server(), dblink_connect(), dblink_get_conn(), dblink_init(), GetConnection(), pgfdw_get_cleanup_result(), test_shm_mq_pipelined(), wait_for_workers_to_become_ready(), and worker_spi_main().

WaitEventInjectionPointNew()

uint32 WaitEventInjectionPointNew ( const char *  wait_event_name )

extern

Definition at line 155 of file wait_event.c.

{
    return WaitEventCustomNew(PG_WAIT_INJECTIONPOINT, wait_event_name);
}

References PG_WAIT_INJECTIONPOINT, and WaitEventCustomNew().

Referenced by injection_wait(), and test_aio_shmem_init().

Variable Documentation

my_wait_event_info

PGDLLIMPORT uint32* my_wait_event_info

extern

Definition at line 42 of file wait_event.c.

Referenced by pgstat_report_wait_end(), pgstat_report_wait_start(), pgstat_reset_wait_event_storage(), and pgstat_set_wait_event_storage().