From eea5f896780e07f7ca76685061d01e7be5a7abaa Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Thu, 11 Sep 2014 18:26:26 +0200 Subject: erts, kernel: Add os:perf_counter function The perf_counter is a very very cheap and high resolution timer that can be used to timestamp system events. It does not have monoticity guarantees, but should on most OS's expose a monotonous time. A special instruction has been created for this counter to further speed up fetching it. OTP-12908 --- erts/emulator/beam/erl_time.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'erts/emulator/beam/erl_time.h') diff --git a/erts/emulator/beam/erl_time.h b/erts/emulator/beam/erl_time.h index 93a0d556bf..446adcf4af 100644 --- a/erts/emulator/beam/erl_time.h +++ b/erts/emulator/beam/erl_time.h @@ -142,6 +142,8 @@ erts_time_unit_conversion(Uint64 value, Uint32 from_time_unit, Uint32 to_time_unit); +ErtsSysHrTime erts_perf_counter_unit(void); + #if ERTS_GLB_INLINE_INCL_FUNC_DEF ERTS_GLB_INLINE Uint64 -- cgit v1.2.3