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Rearrange backend startup sequence so that ShmemIndexLock can become

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an LWLock instead of a spinlock.  This hardly matters on Unix machines
but should improve startup performance on Windows (or any port using
EXEC_BACKEND).  Per previous discussion.
This commit is contained in:
Tom Lane
2006-01-04 21:06:32 +00:00
parent e0078ea22d
commit 349f40b2c2
15 changed files with 414 additions and 259 deletions
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33
src/backend/bootstrap/bootstrap.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.209 2005/11/22 18:17:07 momjian Exp $
* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.210 2006/01/04 21:06:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -381,22 +381,19 @@ BootstrapMain(int argc, char *argv[])
BaseInit();
/*
* We aren't going to do the full InitPostgres pushups, but there are a
* couple of things that need to get lit up even in a dummy process.
* When we are a dummy process, we aren't going to do the full
* InitPostgres pushups, but there are a couple of things that need
* to get lit up even in a dummy process.
*/
if (IsUnderPostmaster)
{
/* set up proc.c to get use of LWLocks */
switch (xlogop)
{
case BS_XLOG_BGWRITER:
InitDummyProcess(DUMMY_PROC_BGWRITER);
break;
default:
InitDummyProcess(DUMMY_PROC_DEFAULT);
break;
}
/*
* Create a PGPROC so we can use LWLocks. In the EXEC_BACKEND case,
* this was already done by SubPostmasterMain().
*/
#ifndef EXEC_BACKEND
InitDummyProcess();
#endif
/* finish setting up bufmgr.c */
InitBufferPoolBackend();
@ -437,11 +434,17 @@ BootstrapMain(int argc, char *argv[])
proc_exit(1);
}
/*
* We must be getting invoked for bootstrap mode
*/
Assert(!IsUnderPostmaster);
SetProcessingMode(BootstrapProcessing);
/*
* backend initialization
* Do backend-like initialization for bootstrap mode
*/
InitProcess();
(void) InitPostgres(dbname, NULL);
/*