[Python-checkins] peps: PEP 418: Mention CLOCK_*_COARSE and Tools/pybench/systimes.py

[victor.stinner]

http://hg.python.org/peps/rev/9a455a87ffac
changeset:   4193:9a455a87ffac
user:        Victor Stinner <vstinner at wyplay.com>
date:        Tue Apr 03 14:00:16 2012 +0200
summary:
  PEP 418: Mention CLOCK_*_COARSE and Tools/pybench/systimes.py

files:
  pep-0418.txt |  16 ++++++++++++++++
  1 files changed, 16 insertions(+), 0 deletions(-)


diff --git a/pep-0418.txt b/pep-0418.txt
--- a/pep-0418.txt
+++ b/pep-0418.txt
@@ -383,6 +383,12 @@
    clock_gettime() requires to link the program against the rt
    (real-time) library.
 
+.. note::
+
+   Linux provides also CLOCK_MONOTONIC_COARSE since Linux 2.6.32 which has less
+   accurate than CLOCK_MONOTONIC but is faster.
+
+
 
 Windows: QueryPerformanceCounter
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -554,6 +560,11 @@
 It looks like Linux does not implement clock_getres() and always return 1
 nanosecond.
 
+.. note::
+
+   Linux provides also CLOCK_REALTIME_COARSE since Linux 2.6.32 which has less
+   accurate than CLOCK_REALTIME but is faster.
+
 
 Windows: GetSystemTimeAsFileTime
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -621,6 +632,11 @@
 always return 1 nanosecond. For GetProcessTimes(), the accuracy is read using
 GetSystemTimeAdjustment().
 
+Python source code includes a portable library to get the process time:
+`Tools/pybench/systimes.py
+<http://hg.python.org/cpython/file/tip/Tools/pybench/systimes.py>`_.
+
+
 Functions
 ^^^^^^^^^
 

-- 
Repository URL: http://hg.python.org/peps