Messages in this thread | | | Date | Fri, 20 Nov 2009 09:06:33 -0500 | Subject | Measuring page faults | From | Mike Gagnon <> |
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Hi all,
I would like to measure the latency (execution time) of Linux page faults. I tried using lmbench, but I get unrealistically fast results from the lmbench lat_pagefault benchmark. The problem seems to be that lmbench attempts to ensure pages are paged out using msync with the MS_INVALIDATE flag set, but this doesn't seem to cause page outs on Linux. http://www.bitmover.com/lmbench/lat_pagefault.8.html
I would like to adapt lmbench to correctly measure page faults on Linux, but I need a mechanism to ensure specific pages are paged-out. Is there a good way to reliably cause page-outs in Linux (so that I may then cause page faults by touching the paged-out pages)?
Thanks, Michael Gagnon -- 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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