From: Christoph Lameter <cl@linux.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH V2 6/6] slub: add support for kmem_cache_debug in bulk calls
Date: Wed, 17 Jun 2015 10:08:28 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.11.1506171006020.31991@east.gentwo.org> (raw)
In-Reply-To: <20150617142934.11791.85352.stgit@devil>
> Per request of Joonsoo Kim adding kmem debug support.
> bulk- PREVIOUS - THIS-PATCH
> 1 - 43 cycles(tsc) 10.811 ns - 44 cycles(tsc) 11.236 ns improved -2.3%
> 2 - 27 cycles(tsc) 6.867 ns - 28 cycles(tsc) 7.019 ns improved -3.7%
> 3 - 21 cycles(tsc) 5.496 ns - 22 cycles(tsc) 5.526 ns improved -4.8%
> 4 - 24 cycles(tsc) 6.038 ns - 19 cycles(tsc) 4.786 ns improved 20.8%
> 8 - 17 cycles(tsc) 4.280 ns - 18 cycles(tsc) 4.572 ns improved -5.9%
> 16 - 17 cycles(tsc) 4.483 ns - 18 cycles(tsc) 4.658 ns improved -5.9%
> 30 - 18 cycles(tsc) 4.531 ns - 18 cycles(tsc) 4.568 ns improved 0.0%
> 32 - 58 cycles(tsc) 14.586 ns - 65 cycles(tsc) 16.454 ns improved -12.1%
> 34 - 53 cycles(tsc) 13.391 ns - 63 cycles(tsc) 15.932 ns improved -18.9%
> 48 - 65 cycles(tsc) 16.268 ns - 50 cycles(tsc) 12.506 ns improved 23.1%
> 64 - 53 cycles(tsc) 13.440 ns - 63 cycles(tsc) 15.929 ns improved -18.9%
> 128 - 79 cycles(tsc) 19.899 ns - 86 cycles(tsc) 21.583 ns improved -8.9%
> 158 - 90 cycles(tsc) 22.732 ns - 90 cycles(tsc) 22.552 ns improved 0.0%
> 250 - 95 cycles(tsc) 23.916 ns - 98 cycles(tsc) 24.589 ns improved -3.2%
Hmmm.... Can we afford these regressions?
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next prev parent reply other threads:[~2015-06-17 15:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-17 14:26 [PATCH V2 0/6] slub: bulk alloc and free for slub allocator Jesper Dangaard Brouer
2015-06-17 14:27 ` [PATCH V2 1/6] slub: fix spelling succedd to succeed Jesper Dangaard Brouer
2015-06-17 14:27 ` [PATCH V2 2/6] slab: infrastructure for bulk object allocation and freeing Jesper Dangaard Brouer
2015-06-17 14:28 ` [PATCH V2 3/6] slub bulk alloc: extract objects from the per cpu slab Jesper Dangaard Brouer
2015-06-17 14:28 ` [PATCH V2 4/6] slub: improve bulk alloc strategy Jesper Dangaard Brouer
2015-06-17 14:29 ` [PATCH V2 5/6] slub: initial bulk free implementation Jesper Dangaard Brouer
2015-06-17 14:29 ` [PATCH V2 6/6] slub: add support for kmem_cache_debug in bulk calls Jesper Dangaard Brouer
2015-06-17 15:08 ` Christoph Lameter [this message]
2015-06-17 15:24 ` Jesper Dangaard Brouer
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