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author | Rickard Green <[email protected]> | 2014-10-30 23:57:01 +0100 |
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committer | Rickard Green <[email protected]> | 2015-03-20 15:23:10 +0100 |
commit | 6487aac5977cf470bc6a2cd0964da2850ee38717 (patch) | |
tree | 84fa1670c6d09a57655c1b7be75fb5e34c5981ec /erts/emulator/beam/benchmark.h | |
parent | cd917e88f5718eead826c896864cfe85cd3d301b (diff) | |
download | otp-6487aac5977cf470bc6a2cd0964da2850ee38717.tar.gz otp-6487aac5977cf470bc6a2cd0964da2850ee38717.tar.bz2 otp-6487aac5977cf470bc6a2cd0964da2850ee38717.zip |
Introduce a new time API
The old time API is based on erlang:now/0. The major issue with
erlang:now/0 is that it was intended to be used for so many
unrelated things. This tied these unrelated operations together
and unnecessarily caused performance, scalability as well as
accuracy, and precision issues for operations that do not need
to have such issues. The new API spreads different functionality
over multiple functions in order to improve on this.
The new API consists of a number of new BIFs:
- erlang:convert_time_unit/3
- erlang:monotonic_time/0
- erlang:monotonic_time/1
- erlang:system_time/0
- erlang:system_time/1
- erlang:time_offset/0
- erlang:time_offset/1
- erlang:timestamp/0
- erlang:unique_integer/0
- erlang:unique_integer/1
- os:system_time/0
- os:system_time/1
and a number of extensions of existing BIFs:
- erlang:monitor(time_offset, clock_service)
- erlang:system_flag(time_offset, finalize)
- erlang:system_info(os_monotonic_time_source)
- erlang:system_info(time_offset)
- erlang:system_info(time_warp_mode)
- erlang:system_info(time_correction)
- erlang:system_info(start_time)
See the "Time and Time Correction in Erlang" chapter of the
ERTS User's Guide for more information.
Diffstat (limited to 'erts/emulator/beam/benchmark.h')
-rw-r--r-- | erts/emulator/beam/benchmark.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/erts/emulator/beam/benchmark.h b/erts/emulator/beam/benchmark.h index 766edaac42..7f267b7201 100644 --- a/erts/emulator/beam/benchmark.h +++ b/erts/emulator/beam/benchmark.h @@ -175,10 +175,10 @@ extern BM_TIMER_T start_time; #else /* !USE_PERFCTR (Assuming Solaris) */ -#define BM_TIMER_T hrtime_t -#define BM_START_TIMER(t) system_clock = sys_gethrtime() +#define BM_TIMER_T ErtsMonotonicTime +#define BM_START_TIMER(t) system_clock = ERTS_MONOTONIC_TO_NSEC(erts_os_monotonic_time()) #define BM_STOP_TIMER(t) do { \ - BM_TIMER_T tmp = (sys_gethrtime() - system_clock) - timer_time; \ + BM_TIMER_T tmp = (ERTS_MONOTONIC_TO_NSEC(erts_os_monotonic_time()) - system_clock) - timer_time; \ t##_time += (tmp > 0 ? tmp : 0); \ } while(0) |