Re: [Ext2-devel] Re: [RFC][PATCH 0/2]Extend ext3 filesystem limitfrom 8TB to 16TB

[Laurent Vivier]

Le lun 10/04/2006 Ã 10:24, Andrew Morton a Ãcrit :
> Laurent Vivier <Laurent.Vivier@xxxxxxxx> 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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