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    SubjectRe: Tests for cpusets and cgroup performance measurement
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    Hello Paul,

    On Mon, Mar 21, 2011 at 11:03 PM, Paul Menage <menage@google.com> wrote:
    > On Mon, Mar 21, 2011 at 3:42 AM, Jaswinder Singh
    > <jaswinderlinux@gmail.com> wrote:
    >>
    >> Can you please suggest some simple tests to measure the performance
    >> enhancement by using cpusets/cgroups.
    >
    > The cgroups framework is simply a way of grouping processes together
    > and allowing subsystems (memory, CPU, disk I/O, etc) to associate
    > state objects with each group. Generally this is for improving
    > isolation rather than improving performance - sticking extra machinery
    > and scheduling in will typically reduce overall throughput, but make
    > it more practical to share resources safely between multiple groups of
    > processes.
    >
    > Your question is pretty open-ended - what's your ultimate goal? You
    > should probably be focusing on some particular problem that you're
    > trying to measure/improve via resource isolation/scheduling.
    >

    As per http://www.clusterresources.com/torquedocs21/3.5linuxcpusets.shtml :

    Under section 3.5.4 Cpuset advantages / disadvantages

    "Jobs on larger NUMA systems may see a performance boost if jobs can be
    intelligently assigned to specific CPUs. Jobs may perform better if
    striped across physical processors, or contained within the fewest
    number of memory controllers."


    I am curious and want to try some simple tests so that I can see the
    performance improvement by using cpusets on my PCs.

    Can you suggest some tests so that I can study them.

    Thank you,
    --
    Jaswinder Singh.


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