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Major patch to speed up backend startup after profiling analysis.

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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
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124
src/backend/storage/ipc/s_lock.c
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@@ -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()