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    SubjectRe: [Ext2-devel] Re: [RFC][PATCH 0/2]Extend ext3 filesystem limit from 8TB to 16TB
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    Le lun 10/04/2006 à 10:24, Andrew Morton a écrit :
    > Laurent Vivier <Laurent.Vivier@bull.net> wrote:
    > >
    > > Does the attached patch look like the thing you though about ?
    >
    > I guess so. But it'll need a lot of performance testing on big SMP
    > to work out what the impact is.

    I made some tests with dbench:

    IBM x440: 8 CPUs hyperthreaded = 16 CPUs (Xeon at 1.4 Ghz)

    with percpu_counter:

    Throughput 188.365 MB/sec 16 procs
    Throughput 226.164 MB/sec 32 procs
    Throughput 142.913 MB/sec 64 procs

    with atomic_long_t:

    Throughput 194.385 MB/sec 16 procs
    Throughput 237.273 MB/sec 32 procs
    Throughput 160.751 MB/sec 64 procs

    Regards,
    Laurent
    --
    Laurent Vivier
    Bull, Architect of an Open World (TM)
    http://www.bullopensource.org/ext4
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