Re: SMP: bind process to cpu

From: Thomas Widmann (thomas.widmann@icn.siemens.de)
Date: Sat Feb 17 2001 - 14:08:08 EST

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    Hi,

    * Andrew Morton wrote:

    > > Hi,
    > >
    > > I run an 3*XEON 550MHz Primergy with 2GB of RAM.
    > > On this machine, i have compiled kernel 2.4.0SMP.
    > >
    > > Is it possible to bind a process to a specific
    > > cpu on this SMP machine (process affinity) ?
    > >
    > > I there something like pset ?
    >
    > A patch which creates /proc/<pid>/cpus_allowed is at
    >
    > http://www.uow.edu.au/~andrewm/linux/#cpus_allowed
    >
    > You just write a bitmask into it.

    Thanks for this information. I patched my the kernel with it.
    After rebooting with the new kernel i can see the bitmask
    for every process running on my server.

    #cat /proc/1310/cpus_allowed
    ffffffff

    Now, if i want to run this process on only one cpu, i which way
    do i have to set the bitmask ?
    Let's say, i want to run it on cpu0. how look's the bitmask ?

    Thanks

    Regards
    Thomas
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