diff options
Diffstat (limited to 'src/include/pg_config_manual.h')
| -rw-r--r-- | src/include/pg_config_manual.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h index 810be27e813..ac45ee6426e 100644 --- a/src/include/pg_config_manual.h +++ b/src/include/pg_config_manual.h @@ -189,6 +189,17 @@ #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 + +/* *------------------------------------------------------------------------ * The following symbols are for enabling debugging code, not for * controlling user-visible features or resource limits. |