diff options
Diffstat (limited to 'src/include/portability')
| -rw-r--r-- | src/include/portability/instr_time.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h index 39a4f0600e2..faf806a4410 100644 --- a/src/include/portability/instr_time.h +++ b/src/include/portability/instr_time.h @@ -253,4 +253,32 @@ GetTimerFrequency(void) #define INSTR_TIME_SET_CURRENT_LAZY(t) \ (INSTR_TIME_IS_ZERO(t) ? INSTR_TIME_SET_CURRENT(t), true : false) +/* + * Simpler convenient interface + * + * The instr_time type is expensive when dealing with time arithmetic. + * Define a type to hold microseconds on top of this, suitable for + * benchmarking performance measures, eg in "pgbench". + * + * Type int64 is good enough for about 584500 years. + */ +typedef int64 pg_time_usec_t; + +static inline pg_time_usec_t +pg_time_now(void) +{ + instr_time now; + + INSTR_TIME_SET_CURRENT(now); + return (pg_time_usec_t) INSTR_TIME_GET_MICROSEC(now); +} + +static inline void +pg_time_now_lazy(pg_time_usec_t *now) +{ + if ((*now) == 0) + (*now) = pg_time_now(); +} + +#define PG_TIME_GET_DOUBLE(t) (0.000001 * (t)) #endif /* INSTR_TIME_H */ |