Messages in this thread | | | Date | Fri, 28 Apr 2006 11:10:16 +0200 | From | Pavel Machek <> | Subject | Re: Lockless page cache test results |
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On St 26-04-06 15:53:10, Jens Axboe wrote: > Hi, > > Running a splice benchmark on a 4-way IPF box, I decided to give the > lockless page cache patches from Nick a spin. I've attached the results > as a png, it pretty much speaks for itself. > > The test in question splices a 1GiB file to a pipe and then splices that > to some output. Normally that output would be something interesting, in > this case it's simply /dev/null. So it tests the input side of things > only, which is what I wanted to do here. To get adequate runtime, the > operation is repeated a number of times (120 in this example). The > benchmark does that number of loops with 1, 2, 3, and 4 clients each > pinned to a private CPU. The pinning is mainly done for more stable > results.
35GB/sec, AFAICS? Not sure how significant this benchmark is.. even with 4 clients, you have 2.5GB/sec, and that is better than almost anything you can splice to... Pavel -- Thanks for all the (sleeping) penguins. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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