Bug 11651 - test_sstate_noop_samesigs performance when there are differences is dire
Summary: test_sstate_noop_samesigs performance when there are differences is dire
Status: RESOLVED FIXED
Alias: None
Product: Build Testing
Classification: QA/Testing
Component: general (show other bugs)
Version: unspecified
Hardware: x86 Multiple
: Medium normal
Target Milestone: 2.4
Assignee: Leonardo Sandoval Gonzalez
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Reported: 2017-06-13 09:08 UTC by Richard Purdie
Modified: 2017-08-16 19:29 UTC (History)
1 user (show)

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OS type for building Yocto: ---
Type of Regression: ---
Verified:
Documentation change: No (bug/feature does not impact docs)

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Description Richard Purdie 2017-06-13 09:08:14 UTC 
oe-selftest -r sstatetests.SStateTests.test_sstate_noop_samesigs

I had a local issue where a function depended on BB_NUMBER_THREADS in global scope (in do_package_ipk). This selftest took hours to run. The reasons were that:

a) The test forces single threading (easy fix, I'll send a patch)
b) It loops over calling bitbake-diffsigs on every hash difference thanks to: http://git.yoctoproject.org/cgit.cgi/poky/commit/meta/lib/oeqa/selftest/sstatetests.py?id=85dbd7bf9e4b6eccdbb8102e462dd681240c1c57

Whilst bitbake-diffsigs is useful we probably need to cap the output at X (say 20?) differences.
Comment 1 Richard Purdie 2017-06-13 09:12:37 UTC 
One quick fix may be to call the python function instead of using process and a new python interpreter each time.
Comment 2 Leonardo Sandoval Gonzalez 2017-08-04 19:01:44 UTC 
patches sent to the mailing list:

http://lists.openembedded.org/pipermail/openembedded-core/2017-August/140480.html and 81.
Comment 3 Leonardo Sandoval Gonzalez 2017-08-16 19:29:48 UTC 
Merged at

a2e2f434cd: Leonardo Sandoval: Fri Aug 11 00:08:33 2017 +0100: sstatetests: limit the number of signature comparisons when differ

5dd65cf502: Leonardo Sandoval: Tue Aug 8 12:53:02 2017 +0100: sstatetests: Use python function instead of bitbake-diffsigs script