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Date: Fri, 14 Mar 2008 11:04:02 +0800 From: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> To: Christoph Lameter <clameter@....com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Kay Sievers <kay.sievers@...y.org>, Greg Kroah-Hartman <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu> Subject: Re: hackbench regression since 2.6.25-rc On Thu, 2008-03-13 at 17:16 -0700, Christoph Lameter wrote: > Could you recompile the kernel with slub performance statistics and post > the output of > > slabinfo -AD Before testing with kernel 2.6.25-rc5: Name Objects Alloc Free %Fast vm_area_struct 2795 135185 132587 93 29 :0004096 25 119045 119043 99 98 :0000064 12257 119671 107742 98 50 :0000192 3312 78563 75370 92 21 :0000128 4648 48143 43738 97 53 dentry 15217 46675 31527 95 72 :0000080 12784 33674 21206 99 97 :0000016 4367 25871 23705 99 78 :0000096 3001 22591 20084 99 92 buffer_head 5536 18147 12884 97 42 anon_vma 1729 14948 14130 99 73 After testing: Name Objects Alloc Free %Fast :0000192 3428 80093958 80090708 92 8 :0000512 374 80016030 80015715 68 7 vm_area_struct 2875 224524 221868 94 20 :0000064 12408 134273 122227 98 47 :0004096 24 127397 127395 99 98 :0000128 4596 57837 53432 97 48 dentry 15659 51402 35824 95 64 :0000016 4584 29327 27161 99 76 :0000080 12784 33674 21206 99 97 :0000096 2998 26264 23757 99 93 So block 192 and 512's and very active and their fast free percentage is low. -yanmin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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