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| author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-09-11 08:09:07 +0000 |
|---|---|---|
| committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-09-11 08:09:07 +0000 |
| commit | b8eec6b6915e87f341bbb7166eda72694f47f12d (patch) | |
| tree | 82f6607f688120845e3650c9fe11f95b794f83af | |
| parent | dd9a92417d0e7d9fd3545feda6240140de50fac8 (diff) | |
| download | ruby-b8eec6b6915e87f341bbb7166eda72694f47f12d.tar.gz | |
lib/benchmark.rb: remove CLOCK_MONOTONIC_RAW support
In addition to being unaffected by _offset_ correction,
CLOCK_MONOTONIC_RAW is also unaffected by _frequency_ correction,
making it unsuitable for measuring real time on systems where the
clock is always running too fast or slow.
CLOCK_MONOTONIC (without _RAW) is the correct clock, as it is unaffected
by _offset_ correction (due to human error or battery replacement), but
still takes _frequency_ correction into account for clocks which
consistently run too fast or slow.
Thanks to Vít Ondruch for reporting the issue on ARM [Bug #10202]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47526 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | lib/benchmark.rb | 3 |
2 files changed, 6 insertions, 3 deletions
@@ -1,3 +1,9 @@ +Thu Sep 11 17:04:54 2014 Eric Wong <e@80x24.org> + + * lib/benchmark.rb: remove CLOCK_MONOTONIC_RAW support + Thanks to Vít Ondruch for reporting the issue on ARM. + [Bug #10202] + Thu Sep 11 14:31:57 2014 Koichi Sasada <ko1@atdot.net> * include/ruby/ruby.h: freeze nil/true/false. diff --git a/lib/benchmark.rb b/lib/benchmark.rb index 1b08e7d2b3..690dff1c28 100644 --- a/lib/benchmark.rb +++ b/lib/benchmark.rb @@ -272,9 +272,6 @@ module Benchmark # :stopdoc: case - when (defined?(Process::CLOCK_MONOTONIC_RAW) and - (Process.clock_gettime(Process::CLOCK_MONOTONIC_RAW) rescue false)) - BENCHMARK_CLOCK = Process::CLOCK_MONOTONIC_RAW when defined?(Process::CLOCK_MONOTONIC) BENCHMARK_CLOCK = Process::CLOCK_MONOTONIC else |