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| author | Batuhan Taskaya <isidentical@gmail.com> | 2020-05-16 09:39:09 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-16 09:39:09 (GMT) |
| commit | 45410862321ae509e8753f239b0ea28fdcef5bad (patch) | |
| tree | 030a36663d2dc03cf7ce87b528ab316f948ec4e1 /Modules/timemodule.c | |
| parent | 62972d9d73e83d6eea157617cc69500ffec9e3f0 (diff) | |
| download | cpython-45410862321ae509e8753f239b0ea28fdcef5bad.zip cpython-45410862321ae509e8753f239b0ea28fdcef5bad.tar.gz cpython-45410862321ae509e8753f239b0ea28fdcef5bad.tar.bz2 | |
bpo-40192: Use thread_cputime for time.thread_time to improve resolution (GH-19381)
On AIX, time.thread_time() is now implemented with thread_cputime()
which has nanosecond resolution, rather than
clock_gettime(CLOCK_THREAD_CPUTIME_ID) which has a resolution of 10 ms.
Diffstat (limited to 'Modules/timemodule.c')
| -rw-r--r-- | Modules/timemodule.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Modules/timemodule.c b/Modules/timemodule.c index a0e66ac..8a4d149 100644 --- a/Modules/timemodule.c +++ b/Modules/timemodule.c @@ -24,6 +24,10 @@ # include <pthread.h> #endif +#if defined(_AIX) +# include <sys/thread.h> +#endif + #if defined(__WATCOMC__) && !defined(__QNX__) # include <i86.h> #else @@ -1343,6 +1347,30 @@ _PyTime_GetThreadTimeWithInfo(_PyTime_t *tp, _Py_clock_info_t *info) return 0; } +#elif defined(_AIX) +#define HAVE_THREAD_TIME +static int +_PyTime_GetThreadTimeWithInfo(_PyTime_t *tp, _Py_clock_info_t *info) +{ + /* bpo-40192: On AIX, thread_cputime() is preferred: it has nanosecond + resolution, whereas clock_gettime(CLOCK_THREAD_CPUTIME_ID) + has a resolution of 10 ms. */ + thread_cputime_t tc; + if (thread_cputime(-1, &tc) != 0) { + PyErr_SetFromErrno(PyExc_OSError); + return -1; + } + + if (info) { + info->implementation = "thread_cputime()"; + info->monotonic = 1; + info->adjustable = 0; + info->resolution = 1e-9; + } + *tp = _PyTime_FromNanoseconds(tc.stime + tc.utime); + return 0; +} + #elif defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_PROCESS_CPUTIME_ID) #define HAVE_THREAD_TIME static int |