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tests: increase CPU percentage threshold for assert_cpu_usage_low

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When sleeping for the tick rate of 100ms (defined in
thread_pthread.c) as we do in test/ruby/test_io.rb
(test_copy_stream_no_busy_wait), it may not be possible to
measure with <= 10ms resolution on 100HZ systems (CONFIG_HZ in
the Linux kernel).  So increase the threshold to 15ms (10ms +
5ms slack for slow systems).

* test/lib/test/unit/assertions.rb (assert_cpu_usage_low):
  increase pct default value [ruby-core:81427]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58934 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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normal 2017-05-28 01:43:38 +00:00
parent ddf2a1675d
commit 109ccfdb2c
1 changed files with 1 additions and 1 deletions
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2
test/lib/test/unit/assertions.rb
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@ -715,7 +715,7 @@ eom
skip
end
def assert_cpu_usage_low(msg = nil, pct: 0.005)
def assert_cpu_usage_low(msg = nil, pct: 0.015)
require 'benchmark'
tms = Benchmark.measure(msg || '') { yield }
max = pct * tms.real