FYI, we noticed that phoronix-test-suite.time.involuntary_context_switches +442.2% change on https://github.com/0day-ci/linux Kent-Overstreet/mm-Refactor-find_get_pages-friends/20160401-104010 commit efe186b040db472412151e66616efef8d2b5dfd7 ("mm: Real pagecache iterators") ========================================================================================= compiler/kconfig/rootfs/tbox_group/test/testcase: gcc-4.9/x86_64-rhel/debian-full-x86_64/lkp-ne02/postmark-1.1.0/phoronix-test-suite commit: 8bc43c95e70464f4621317a59e405d901f00d13b efe186b040db472412151e66616efef8d2b5dfd7 8bc43c95e70464f4 efe186b040db472412151e6661 ---------------- -------------------------- fail:runs %reproduction fail:runs | | | %stddev %change %stddev \ | \ 170373 ± 1% +442.2% 923755 ± 0% phoronix-test-suite.time.involuntary_context_switches 24546 ± 0% -0.9% 24320 ± 0% phoronix-test-suite.time.maximum_resident_set_size 6933914 ± 1% -2.3% 6775202 ± 0% phoronix-test-suite.time.voluntary_context_switches 170373 ± 1% +442.2% 923755 ± 0% time.involuntary_context_switches lkp-ne02: Nehalem-EP Memory: 4G phoronix-test-suite.time.involuntary_context_switches 1.4e+06 ++----------------------------------------------------------------+ | | 1.2e+06 ++ O | | | 1e+06 ++ | | OO OO O O O O OO O O | 800000 O+ O O O | | | 600000 ++ | | | 400000 ++ | | | 200000 *+ **.** **.* * * **.** *.* * *.**.* *.**.**.**.* *.* **.** |:+ + : : :+ :+ : + : ::+ : :: :: :+ | 0 +O-O---O-*----*-*O-*--*O-----O---*--*------*------------*---*-----+ time.involuntary_context_switches 1.4e+06 ++----------------------------------------------------------------+ | | 1.2e+06 ++ O | | | 1e+06 ++ | | OO OO O O O O OO O O | 800000 O+ O O O | | | 600000 ++ | | | 400000 ++ | | | 200000 *+ **.** **.* * * **.** *.* * *.**.* *.**.**.**.* *.* **.** |:+ + : : :+ :+ : + : ::+ : :: :: :+ | 0 +O-O---O-*----*-*O-*--*O-----O---*--*------*------------*---*-----+ [*] bisect-good sample [O] bisect-bad sample To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong Ye