Messages in this thread | | | Date | Thu, 1 Jun 2006 08:35:39 +0200 | From | Voluspa <> | Subject | Re: Adaptive Readahead V14 - statistics question... |
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On Thu, 1 Jun 2006 13:51:43 +0800 Fengguang Wu wrote: > On Wed, May 31, 2006 at 11:50:21PM +0200, Voluspa wrote: > > _Massive READ_ > > > > [/usr had some 490000 files] > > > > "cd /usr ; time find . -type f -exec md5sum {} \;" > > > > 2.6.17-rc5 ------- 2.6.17-rc5-ar > > > > real 21m21.009s -- 21m37.663s > > user 3m20.784s -- 3m20.701s > > sys 6m34.261s -- 6m41.735s > > > > I had planned to run this at least three times, but didn't realize I had > > 12 compiled kernel trees and 3 uncompiled there... So, a one-shot had to > > do. But it's still significant. > > Sorry, it is a known regression. I'd like to fix it in the next > release.
That's cool. I had fun testing (I'm weird) and now have a fixed procedure to monitor your future work. When/if it hits mainline I'll both back it out and switch it on/off. Then shout WOLF if I see a regression anywhere ;)
There's still the readahead size to adjust. I'll return with my findings.
Mvh Mats Johannesson -- - 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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