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SubjectRe: 2.5.31 kmap_atomic copy_*_user benefits
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On Friday 16 August 2002 01:35, William Lee Irwin III wrote:
> On Thu, Aug 15, 2002 at 04:21:26PM -0700, William Lee Irwin III wrote:
> > With and without kmap_atomic() -based copy_*_user() patches from akpm.
> > Taken on a 16x/16GB box.
> > Take 1: total throughput:
> > before:
> > Throughput 32.3019 MB/sec (NB=40.3774 MB/sec 323.019 MBit/sec) 512 procs
> > after:
> > Throughput 46.9837 MB/sec (NB=58.7296 MB/sec 469.837 MBit/sec) 512 procs
> > In the follow-ups I'll include oprofile numbers for each and vmstat logs.
>
> doh! the workload was dbench 512

Of course you know about the butterfly effect with respect to dbench...

--
Daniel
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