database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-13 16:22:44 +03:00
Code Activity

Major patch to speed up backend startup after profiling analysis.

Browse Source
This commit is contained in:
Bruce Momjian
1997-08-24 23:08:01 +00:00
parent 281ba3f40d
commit c4cb617504
9 changed files with 122 additions and 198 deletions
Download Patch File Download Diff File Expand all files Collapse all files

124
src/backend/storage/ipc/s_lock.c
View File

@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.19 1997/08/20 00:50:11 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.20 1997/08/24 23:07:28 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -44,12 +44,6 @@
#if defined(HAS_TEST_AND_SET)
# if defined(__alpha__) && defined(linux)
static long int tas(slock_t *lock);
# else
static int tas(slock_t *lock);
#endif
#if defined (nextstep)
/*
* NEXTSTEP (mach)
@@ -167,6 +161,8 @@ S_LOCK_FREE(slock_t *lock)
defined(sparc_solaris)
/* for xxxxx_solaris, this is defined in port/.../tas.s */
static int tas(slock_t *lock);
void
S_LOCK(slock_t *lock)
{
@@ -233,6 +229,8 @@ S_INIT_LOCK(slock_t *lock)
*/
static slock_t clear_lock = { -1, -1, -1, -1 };
static int tas(slock_t *lock);
void
S_LOCK(slock_t *lock)
{
@@ -268,6 +266,8 @@ S_LOCK_FREE(slock_t *lock)
#if defined(sun3)
static int tas(slock_t *lock);
void
S_LOCK(slock_t *lock)
{
@@ -320,6 +320,8 @@ tas_dummy()
#define asm(x) __asm__(x)
#endif
static int tas(slock_t *lock);
static int
tas_dummy()
{
@@ -383,19 +385,14 @@ S_INIT_LOCK(unsigned char *addr)
#if defined(NEED_I386_TAS_ASM)
static int
tas(slock_t *m)
{
slock_t res;
__asm__("xchgb %0,%1":"=q" (res),"=m" (*m):"0" (0x1));
return(res);
}
void
S_LOCK(slock_t *lock)
{
while (tas(lock))
;
slock_t res;
do{
__asm__("xchgb %0,%1":"=q" (res),"=m" (*lock):"0" (0x1));
}while(res != 0);
}
void
@@ -415,31 +412,26 @@ S_INIT_LOCK(slock_t *lock)
#if defined(__alpha__) && defined(linux)
static long int
tas(slock_t *m)
{
slock_t res;
__asm__(" ldq $0, %0 \n\
bne $0, already_set \n\
ldq_l $0, %0 \n\
bne $0, already_set \n\
or $31, 1, $0 \n\
stq_c $0, %0 \n\
beq $0, stqc_fail \n\
success: bis $31, $31, %1 \n\
mb \n\
jmp $31, end \n\
stqc_fail: or $31, 1, $0 \n\
already_set: bis $0, $0, %1 \n\
end: nop " : "=m" (*m), "=r" (res) :: "0" );
return(res);
}
void
S_LOCK(slock_t *lock)
{
while (tas(lock))
;
slock_t res;
do{
__asm__(" ldq $0, %0 \n\
bne $0, already_set \n\
ldq_l $0, %0 \n\
bne $0, already_set \n\
or $31, 1, $0 \n\
stq_c $0, %0 \n\
beq $0, stqc_fail \n\
success: bis $31, $31, %1 \n\
mb \n\
jmp $31, end \n\
stqc_fail: or $31, 1, $0 \n\
already_set: bis $0, $0, %1 \n\
end: nop " : "=m" (*lock), "=r" (res) :: "0" );
}while(res != 0);
}
void
@@ -459,21 +451,16 @@ S_INIT_LOCK(slock_t *lock)
#if defined(linux) && defined(sparc)
static int
tas(slock_t *m)
{
slock_t res;
__asm__("ldstub [%1], %0"
: "=&r" (res)
: "r" (m));
return (res != 0);
}
void
S_LOCK(slock_t *lock)
{
while (tas(lock))
;
slock_t res;
do{
__asm__("ldstub [%1], %0"
: "=&r" (res)
: "r" (lock));
}while(!res != 0);
}
void
@@ -490,41 +477,6 @@ S_INIT_LOCK(slock_t *lock)
#endif /* defined(linux) && defined(sparc) */
#if defined(NEED_NS32K_TAS_ASM)
static int
tas(slock_t *m)
{
slock_t res = 0;
__asm__("movd 8(fp), r1");
__asm__("movqd 0, r0");
__asm__("sbitd r0, 0(r1)");
__asm__("sprb us, %0" : "=r" (res));
res = (res >> 5) & 1;
return res;
}
void
S_LOCK(slock_t *lock)
{
while (tas(lock))
;
}
void
S_UNLOCK(slock_t *lock)
{
*lock = 0;
}
void
S_INIT_LOCK(slock_t *lock)
{
S_UNLOCK(lock);
}
#endif /* NEED_NS32K_TAS_ASM */
#if defined(linux) && defined(PPC)
static int tas_dummy()

64
src/backend/storage/page/bufpage.c
View File

@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/page/bufpage.c,v 1.7 1997/08/19 21:33:33 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/page/bufpage.c,v 1.8 1997/08/24 23:07:30 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -31,43 +31,6 @@ static void PageIndexTupleDeleteAdjustLinePointers(PageHeader phdr,
static bool PageManagerShuffle = true; /* default is shuffle mode */
/* ----------------------------------------------------------------
* Buffer support functions
* ----------------------------------------------------------------
*/
/*
* BufferGetPageSize --
* Returns the page size within a buffer.
*
* Notes:
* Assumes buffer is valid.
*
* The buffer can be a raw disk block and need not contain a valid
* (formatted) disk page.
*/
Size
BufferGetPageSize(Buffer buffer)
{
Size pageSize;
Assert(BufferIsValid(buffer));
pageSize = BLCKSZ; /* XXX dig out of buffer descriptor */
Assert(PageSizeIsValid(pageSize));
return (pageSize);
}
/*
* BufferGetPage --
* Returns the page associated with a buffer.
*/
Page
BufferGetPage(Buffer buffer)
{
return (Page) BufferGetBlock(buffer);
}
/* ----------------------------------------------------------------
* Page support functions
* ----------------------------------------------------------------
@@ -94,31 +57,6 @@ PageInit(Page page, Size pageSize, Size specialSize)
PageSetPageSize(page, pageSize);
}
/*
* PageGetItem --
* Retrieves an item on the given page.
*
* Note:
* This does change the status of any of the resources passed.
* The semantics may change in the future.
*/
Item
PageGetItem(Page page, ItemId itemId)
{
Item item;
Assert(PageIsValid(page));
/* Assert(itemId->lp_flags & LP_USED); */
if(!(itemId->lp_flags & LP_USED)) {
elog(NOTICE, "LP_USED assertion failed. dumping core.");
abort();
}
item = (Item)(((char *)page) + itemId->lp_off);
return (item);
}
/*
* PageAddItem --
* Adds item to the given page.