Messages in this thread | | | Subject | Re: splice/vmsplice performance test results | From | "Jim Schutt" <> | Date | Wed, 22 Nov 2006 15:35:12 -0700 |
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On Wed, 2006-11-22 at 09:57 +0100, Jens Axboe wrote: > On Tue, Nov 21 2006, Jim Schutt wrote: [snip] > > > > Hmmm. Is it worth me trying to do some sort of kernel > > profiling to see if there is anything unexpected with > > my setup? If so, do you have a preference as to what > > I would use? > > Not sure that profiling would be that interesting, as the problem > probably lies in where we are _not_ spending the time. But it certainly > can't hurt. Try to oprofile the kernel for a 10-20 sec interval while > the test is running. Do 3 such runs for the two test cases > (write-to-file, vmsplice/splice-to-file). >
OK, I've attached results for 20 second profiles of three runs of each test: read-from-socket + write-to-file, and read-from-socket + vmsplice/splice-to-file.
The test case and throughput is in the name: e.g. rvs-1-306MBps is trial 1 of read/vmsplice/splice case, which ran at 306 MB/s.
Let me know if I can help with more testing, and thanks again for looking into this.
-- Jim Schutt [unhandled content-type:application/x-bzip][unhandled content-type:application/x-bzip][unhandled content-type:application/x-bzip][unhandled content-type:application/x-bzip][unhandled content-type:application/x-bzip][unhandled content-type:application/x-bzip]
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