diff options
Diffstat (limited to 'src/include/pg_config_manual.h')
| -rw-r--r-- | src/include/pg_config_manual.h | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h index 5ee2c462674..844c3e0f094 100644 --- a/src/include/pg_config_manual.h +++ b/src/include/pg_config_manual.h @@ -228,32 +228,6 @@ #define DEFAULT_EVENT_SOURCE "PostgreSQL" /* - * On PPC machines, decide whether to use the mutex hint bit in LWARX - * instructions. Setting the hint bit will slightly improve spinlock - * performance on POWER6 and later machines, but does nothing before that, - * and will result in illegal-instruction failures on some pre-POWER4 - * machines. By default we use the hint bit when building for 64-bit PPC, - * which should be safe in nearly all cases. You might want to override - * this if you are building 32-bit code for a known-recent PPC machine. - */ -#ifdef HAVE_PPC_LWARX_MUTEX_HINT /* must have assembler support in any case */ -#if defined(__ppc64__) || defined(__powerpc64__) -#define USE_PPC_LWARX_MUTEX_HINT -#endif -#endif - -/* - * On PPC machines, decide whether to use LWSYNC instructions in place of - * ISYNC and SYNC. This provides slightly better performance, but will - * result in illegal-instruction failures on some pre-POWER4 machines. - * By default we use LWSYNC when building for 64-bit PPC, which should be - * safe in nearly all cases. - */ -#if defined(__ppc64__) || defined(__powerpc64__) -#define USE_PPC_LWSYNC -#endif - -/* * Assumed cache line size. This doesn't affect correctness, but can be used * for low-level optimizations. Currently, this is used to pad some data * structures in xlog.c, to ensure that highly-contended fields are on |