1berry/ruby
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

lib/benchmark.rb: remove CLOCK_MONOTONIC_RAW support

Browse Source 
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
This commit is contained in:
normal 2014-09-11 08:09:07 +00:00
parent dd9a92417d
commit b8eec6b691
2 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ChangeLog
View File

@ -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.

3
lib/benchmark.rb
View File

@ -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