Bug 43843 - [profiler] Support clock_gettime (CLOCK_PROCESS_CPUTIME_ID) for sampling on Sierra
Summary: [profiler] Support clock_gettime (CLOCK_PROCESS_CPUTIME_ID) for sampling on S...
Status: RESOLVED INVALID
Alias: None
Product: Runtime
Classification: Mono
Component: Profiler ()
Version: master
Hardware: Macintosh Mac OS
: Normal enhancement
Target Milestone: Future Cycle (TBD)
Assignee: Alex Rønne Petersen
URL:
Depends on:
Blocks:
 
Reported: 2016-08-29 19:12 UTC by Alex Rønne Petersen
Modified: 2016-09-10 07:15 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED INVALID

Description Alex Rønne Petersen 2016-08-29 19:12:21 UTC
Currently, sampling on OS X is always based on real time, unlike other OSs, where we use clock_gettime (CLOCK_PROCESS_CPUTIME_ID) in the process time case. Sierra introduces clock_gettime () and friends, including CLOCK_PROCESS_CPUTIME_ID. We should dynamically detect the presence of that function and use it, so that we have the same sampling semantics across platforms.
Comment 1 Alex Rønne Petersen 2016-09-10 07:15:22 UTC
Looks like this won't be happening. Apparently Apple decided to implement clock_gettime, clock_getres, and some others, and a bunch of different clocks, but they didn't think to implement clock_nanosleep.