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Add support for additional DTrace probes.

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Robert Lor
This commit is contained in:
Bruce Momjian
2009-04-02 19:14:34 +00:00
parent 3df4fa6968
commit 227f817c1f
15 changed files with 112 additions and 15 deletions
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32
src/backend/access/transam/slru.c
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@ -41,7 +41,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.45 2009/01/01 17:23:36 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.46 2009/04/02 19:14:33 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -57,6 +57,7 @@
#include "storage/fd.h"
#include "storage/shmem.h"
#include "miscadmin.h"
#include "pg_trace.h"
/*
@ -372,6 +373,7 @@ SimpleLruReadPage(SlruCtl ctl, int pageno, bool write_ok,
{
SlruShared shared = ctl->shared;
TRACE_POSTGRESQL_SLRU_READPAGE_START((uintptr_t)ctl, pageno, write_ok, xid);
/* Outer loop handles restart if we must wait for someone else's I/O */
for (;;)
{
@ -399,6 +401,7 @@ SimpleLruReadPage(SlruCtl ctl, int pageno, bool write_ok,
}
/* Otherwise, it's ready to use */
SlruRecentlyUsed(shared, slotno);
TRACE_POSTGRESQL_SLRU_READPAGE_DONE(slotno);
return slotno;
}
@ -446,6 +449,7 @@ SimpleLruReadPage(SlruCtl ctl, int pageno, bool write_ok,
SlruReportIOError(ctl, pageno, xid);
SlruRecentlyUsed(shared, slotno);
TRACE_POSTGRESQL_SLRU_READPAGE_DONE(slotno);
return slotno;
}
}
@ -470,6 +474,8 @@ SimpleLruReadPage_ReadOnly(SlruCtl ctl, int pageno, TransactionId xid)
SlruShared shared = ctl->shared;
int slotno;
TRACE_POSTGRESQL_SLRU_READPAGE_READONLY((uintptr_t)ctl, pageno, xid);
/* Try to find the page while holding only shared lock */
LWLockAcquire(shared->ControlLock, LW_SHARED);
@ -511,6 +517,8 @@ SimpleLruWritePage(SlruCtl ctl, int slotno, SlruFlush fdata)
int pageno = shared->page_number[slotno];
bool ok;
TRACE_POSTGRESQL_SLRU_WRITEPAGE_START((uintptr_t)ctl, pageno, slotno);
/* If a write is in progress, wait for it to finish */
while (shared->page_status[slotno] == SLRU_PAGE_WRITE_IN_PROGRESS &&
shared->page_number[slotno] == pageno)
@ -525,7 +533,10 @@ SimpleLruWritePage(SlruCtl ctl, int slotno, SlruFlush fdata)
if (!shared->page_dirty[slotno] ||
shared->page_status[slotno] != SLRU_PAGE_VALID ||
shared->page_number[slotno] != pageno)
{
TRACE_POSTGRESQL_SLRU_WRITEPAGE_DONE();
return;
}
/*
* Mark the slot write-busy, and clear the dirtybit. After this point, a
@ -569,6 +580,8 @@ SimpleLruWritePage(SlruCtl ctl, int slotno, SlruFlush fdata)
/* Now it's okay to ereport if we failed */
if (!ok)
SlruReportIOError(ctl, pageno, InvalidTransactionId);
TRACE_POSTGRESQL_SLRU_WRITEPAGE_DONE();
}
/*
@ -593,6 +606,8 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
SlruFileName(ctl, path, segno);
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_START((uintptr_t)ctl, path, pageno, slotno);
/*
* In a crash-and-restart situation, it's possible for us to receive
* commands to set the commit status of transactions whose bits are in
@ -607,6 +622,7 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
{
slru_errcause = SLRU_OPEN_FAILED;
slru_errno = errno;
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -614,6 +630,7 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
(errmsg("file \"%s\" doesn't exist, reading as zeroes",
path)));
MemSet(shared->page_buffer[slotno], 0, BLCKSZ);
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(true, -1, -1);
return true;
}
@ -622,6 +639,7 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
slru_errcause = SLRU_SEEK_FAILED;
slru_errno = errno;
close(fd);
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -631,6 +649,7 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
slru_errcause = SLRU_READ_FAILED;
slru_errno = errno;
close(fd);
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -638,9 +657,12 @@ SlruPhysicalReadPage(SlruCtl ctl, int pageno, int slotno)
{
slru_errcause = SLRU_CLOSE_FAILED;
slru_errno = errno;
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
TRACE_POSTGRESQL_SLRU_READPAGE_PHYSICAL_DONE(true, -1, -1);
return true;
}
@ -668,6 +690,8 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
char path[MAXPGPATH];
int fd = -1;
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_START((uintptr_t)ctl, pageno, slotno);
/*
* Honor the write-WAL-before-data rule, if appropriate, so that we do not
* write out data before associated WAL records. This is the same action
@ -753,6 +777,7 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
{
slru_errcause = SLRU_OPEN_FAILED;
slru_errno = errno;
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -781,6 +806,7 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
slru_errno = errno;
if (!fdata)
close(fd);
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -794,6 +820,7 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
slru_errno = errno;
if (!fdata)
close(fd);
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -808,6 +835,7 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
slru_errcause = SLRU_FSYNC_FAILED;
slru_errno = errno;
close(fd);
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
@ -815,10 +843,12 @@ SlruPhysicalWritePage(SlruCtl ctl, int pageno, int slotno, SlruFlush fdata)
{
slru_errcause = SLRU_CLOSE_FAILED;
slru_errno = errno;
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(false, slru_errcause, slru_errno);
return false;
}
}
TRACE_POSTGRESQL_SLRU_WRITEPAGE_PHYSICAL_DONE(true, -1, -1);
return true;
}