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Change s_lock to not use any zero-delay select() calls; these are just a

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waste of cycles on single-CPU machines, and of dubious utility on multi-CPU
machines too.
Tweak s_lock_stuck so that caller can specify timeout interval, and
increase interval before declaring stuck spinlock for buffer locks and XLOG
locks.
On systems that have fdatasync(), use that rather than fsync() to sync WAL
log writes.  Ensure that WAL file is entirely allocated during XLogFileInit.
This commit is contained in:
Tom Lane
2001-02-18 04:39:42 +00:00
parent 58c4ab9d62
commit 33cc5d8a4d
9 changed files with 285 additions and 189 deletions
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9
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.106 2001/01/24 19:43:05 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.107 2001/02/18 04:39:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1990,6 +1990,9 @@ UnlockBuffers(void)
}
}
/* Max time to wait to acquire a buffer read or write lock */
#define BUFFER_LOCK_TIMEOUT (10*60*1000000) /* 10 minutes */
void
LockBuffer(Buffer buffer, int mode)
{
@ -2041,7 +2044,7 @@ LockBuffer(Buffer buffer, int mode)
{
S_UNLOCK(&(buf->cntx_lock));
RESUME_INTERRUPTS();
S_LOCK_SLEEP(&(buf->cntx_lock), i++);
S_LOCK_SLEEP(&(buf->cntx_lock), i++, BUFFER_LOCK_TIMEOUT);
HOLD_INTERRUPTS();
S_LOCK(&(buf->cntx_lock));
}
@ -2069,7 +2072,7 @@ LockBuffer(Buffer buffer, int mode)
}
S_UNLOCK(&(buf->cntx_lock));
RESUME_INTERRUPTS();
S_LOCK_SLEEP(&(buf->cntx_lock), i++);
S_LOCK_SLEEP(&(buf->cntx_lock), i++, BUFFER_LOCK_TIMEOUT);
HOLD_INTERRUPTS();
S_LOCK(&(buf->cntx_lock));
}