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Extract Benchmark.measure on assert_cpu_usage_low

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This commit is contained in:
Hiroshi SHIBATA 2025-01-10 12:59:29 +09:00
parent 447f426b5c
commit a450e9304d
Notes: git 2025-01-10 04:27:34 +00:00 
Merged: https://github.com/ruby/ruby/pull/12544
1 changed files with 18 additions and 14 deletions
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32
tool/lib/test/unit/assertions.rb
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@ -798,33 +798,37 @@ EOT
MIN_MEASURABLE = 1.0 / MIN_HZ
def assert_cpu_usage_low(msg = nil, pct: 0.05, wait: 1.0, stop: nil)
require 'benchmark'
wait = EnvUtil.apply_timeout_scale(wait)
if wait < 0.1 # TIME_QUANTUM_USEC in thread_pthread.c
warn "test #{msg || 'assert_cpu_usage_low'} too short to be accurate"
end
tms = Benchmark.measure(msg || '') do
if stop
th = Thread.start {sleep wait; stop.call}
yield
th.join
else
begin
Timeout.timeout(wait) {yield}
rescue Timeout::Error
end
t0, r0 = Process.times, Process.clock_gettime(Process::CLOCK_MONOTONIC)
if stop
th = Thread.start {sleep wait; stop.call}
yield
th.join
else
begin
Timeout.timeout(wait) {yield}
rescue Timeout::Error
end
end
max = pct * tms.real
t1, r1 = Process.times, Process.clock_gettime(Process::CLOCK_MONOTONIC)
total = t1.utime - t0.utime + t1.stime - t0.stime + t1.cutime - t0.cutime + t1.cstime - t0.cstime
real = r1 - r0
max = pct * real
min_measurable = MIN_MEASURABLE
min_measurable *= 1.30 # add a little (30%) to account for misc. overheads
if max < min_measurable
max = min_measurable
end
assert_operator tms.total, :<=, max, msg
assert_operator total, :<=, max, msg
end
def assert_is_minus_zero(f)