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Bug #14906

open

MinGW failure - TestIO#test_copy_stream_no_busy_wait

Added by MSP-Greg (Greg L) about 3 years ago. Updated about 3 years ago.

Status:
Open
Priority:
Normal
Assignee:
-
Target version:
-
ruby -v:
ruby 2.6.0dev (2018-07-11 trunk 63945) [x64-mingw32]
[ruby-core:87900]
Tags:

Description

ruby-loco just had a failure on TestIO#test_copy_stream_no_busy_wait for the first time.

  8) Failure:
TestIO#test_copy_stream_no_busy_wait [C:/projects/ruby-loco/src/ruby/test/ruby/test_io.rb:557]:
r58534 [ruby-core:80969] [Backport #13533].
Expected 0.031000000000000028 to be <= 0.016417910447761194.

This was on Appveyor, it passed during parallel, but failed on retry, as TestIO#test_write_no_garbage failed during parallel, which is common.

I haven't really looked at it, or especially assert_cpu_usage_low, but a change to loosen the test up would be helpful.

BTW, it was the only failure on r63945. I haven't really analyzed it, but Appveyor does seem slower just in the last day or so...

Thanks, Greg

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