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    SubjectRe: [PACTH v2 0/3] Implement /proc/<pid>/totmaps
    On Mon 22-08-16 19:29:36, Michal Hocko wrote:
    > On Mon 22-08-16 18:45:54, Michal Hocko wrote:
    > [...]
    > > I have no idea why those numbers are so different on my laptop
    > > yet. It surely looks suspicious. I will try to debug this further
    > > tomorrow.
    >
    > Hmm, so I've tried to use my version of awk on other machine and vice
    > versa and it didn't make any difference. So this is independent on the
    > awk version it seems. So I've tried to strace /usr/bin/time and
    > wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, {ru_utime={0, 0}, ru_stime={0, 688438}, ...}) = 9128
    >
    > so the kernel indeed reports 0 user time for some reason. Note I
    > was testing with 4.7 and right now with 4.8.0-rc3 kernel (no local
    > modifications). The other machine which reports non-0 utime is 3.12
    > SLES kernel. Maybe I am hitting some accounting bug. At first I was
    > suspecting CONFIG_NO_HZ_FULL because that is the main difference between
    > my and the other machine but then I've noticed that the tests I was
    > doing in kvm have this disabled too.. so it must be something else.

    4.5 reports non-0 while 4.6 zero utime. NO_HZ configuration is the same
    in both kernels.
    --
    Michal Hocko
    SUSE Labs

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