From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <403C76D8.3000302@cyberone.com.au> Date: Wed, 25 Feb 2004 21:20:08 +1100 From: Nick Piggin MIME-Version: 1.0 Subject: Re: vm benchmarking References: <20040224034036.22953169.akpm@osdl.org> In-Reply-To: <20040224034036.22953169.akpm@osdl.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org List-ID: Andrew Morton wrote: >I took the various patches in -mm for a quick ride. Dual CPU, mem=64m, >`time make -j4 vmlinux': > > >2.4.25 2:57.34 2:45.62 > >up to blk_congestion_wait-return-remaining 5:41.52 5:56.37 >up to vmscan-remove-priority >up to kswapd-throttling-fixes 7:44.53 >up to vm-dont-rotate-active-list 6:29.23 >up to vm-dont-rotate-active-list-padding >up to vm-lru-info 9:28.47 6:14.70 5:11.99 >up to vm-shrink-zone >up to vm-shrink-zone-div-by-0-fix 9:13.21 8:17.29 >up to vm-tune-throttle 7:39.89 >up to shrink_slab-for-all-zones 7:06.27 >up to zone-balancing-fix 7:46.15 >up to zone-balancing-batching >up to zone-balancing-batching-fix 4:44.76 4:27.02 4:05.56 4:31.66 4:06.76 > > >Based on this, and on your totally contradictory benchmarking, all I'm >prepared to say is that kswapd-throttling-fixes slows things down, and we >don't know why. The rest appears to be worth zilch. Possibly they slow >some things down as much as they speed other things up. > > My machine doesn't touch swap at make -j4 with mem=64m. It is dual CPU with a SMP kernel but I was using maxcpus=1. It compiles 2.4.21 with gcc-3.3.3 I think (I can tell you when I get home). I can't explain your results. Maybe you have other stuff running. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org