Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750819AbVLGKcM (ORCPT ); Wed, 7 Dec 2005 05:32:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750822AbVLGKcL (ORCPT ); Wed, 7 Dec 2005 05:32:11 -0500 Received: from ns.ustc.edu.cn ([202.38.64.1]:2757 "EHLO mx1.ustc.edu.cn") by vger.kernel.org with ESMTP id S1750819AbVLGKcJ (ORCPT ); Wed, 7 Dec 2005 05:32:09 -0500 Date: Wed, 7 Dec 2005 18:58:05 +0800 From: Wu Fengguang To: linux-kernel@vger.kernel.org Cc: Andrew Morton , Christoph Lameter , Rik van Riel , Peter Zijlstra , Marcelo Tosatti , Magnus Damm , Nick Piggin , Andrea Arcangeli Subject: Re: [PATCH 05/16] mm: balance zone aging in kswapd reclaim path Message-ID: <20051207105805.GA7203@mail.ustc.edu.cn> Mail-Followup-To: Wu Fengguang , linux-kernel@vger.kernel.org, Andrew Morton , Christoph Lameter , Rik van Riel , Peter Zijlstra , Marcelo Tosatti , Magnus Damm , Nick Piggin , Andrea Arcangeli References: <20051207104755.177435000@localhost.localdomain> <20051207105004.018561000@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051207105004.018561000@localhost.localdomain> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5568 Lines: 162 Here is the new testing reports. The intermittent and concurrent copy of two files is expected to generate large range of unreclaimable pages. The balance seems to improve a lot since last version. And the direct reclaim times is reduced to minimal. IN QEMU ======= root ~# grep (age |rounds) /proc/zoneinfo rounds 142 age 3621 rounds 142 age 3499 rounds 142 age 3502 root ~# ./show-aging-rate.sh Linux (none) 2.6.15-rc5-mm1 #8 SMP Wed Dec 7 16:06:47 CST 2005 i686 GNU/Linux total used free shared buffers cached Mem: 1138 1119 18 0 0 1105 -/+ buffers/cache: 14 1124 Swap: 0 0 0 --------------------------------------------------------------- active/inactive size ratios: DMA0: 469 / 1000 = 621 / 1323 Normal0: 374 / 1000 = 58588 / 156523 HighMem0: 397 / 1000 = 18880 / 47498 active/inactive scan rates: DMA: 273 / 1000 = 58528 / ( 210464 + 3296) Normal: 342 / 1000 = 7851552 / ( 22838944 + 94080) HighMem: 393 / 1000 = 2680480 / ( 6774304 + 31040) --------------------------------------------------------------- inactive size ratios: DMA0 / Normal0: 85 / 10000 = 1334 / 156630 Normal0 / HighMem0: 32946 / 10000 = 156630 / 47540 inactive scan rates: DMA / Normal: 93 / 10000 = ( 210464 + 3296) / ( 22838944 + 94080) Normal / HighMem: 33698 / 10000 = ( 22838944 + 94080) / ( 6774304 + 31040) root ~# grep -E '(low|high|free|protection:) ' /proc/zoneinfo pages free 1161 low 21 high 25 protection: (0, 0, 880, 1140) pages free 3505 low 1173 high 1408 protection: (0, 0, 0, 2080) pages free 189 low 134 high 203 protection: (0, 0, 0, 0) root ~# vmstat 5 10 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 2 0 0 18556 344 1131720 0 0 16 5 1042 37 4 66 30 0 2 0 0 18616 352 1132324 0 0 0 16 1035 48 6 94 0 0 2 0 0 19060 348 1131512 0 0 0 3 974 52 6 94 0 0 2 0 0 18256 268 1132272 0 0 0 8 1018 50 6 94 0 0 2 0 0 19096 248 1132020 0 0 0 3 1009 49 6 94 0 0 2 0 0 19520 248 1130524 0 0 0 8 989 50 6 94 0 0 2 0 0 18916 248 1131680 0 0 0 3 1008 49 6 94 0 0 1 0 0 18436 208 1132740 0 0 0 7 1009 64 4 96 0 0 2 0 0 18976 200 1132272 0 0 0 14 1029 64 5 95 0 0 2 0 0 19156 200 1131932 0 0 0 8 992 48 6 94 0 0 root ~# cat /proc/vmstat nr_dirty 9 nr_writeback 0 nr_unstable 0 nr_page_table_pages 22 nr_mapped 971 nr_slab 1405 pgpgin 68177 pgpgout 21820 pswpin 0 pswpout 0 pgalloc_high 4338439 pgalloc_normal 15416448 pgalloc_dma32 0 pgalloc_dma 157690 pgfree 19917495 pgactivate 10660320 pgdeactivate 10582874 pgkeephot 53405 pgkeepcold 17 pgfault 145079 pgmajfault 116 pgrefill_high 2707872 pgrefill_normal 7936896 pgrefill_dma32 0 pgrefill_dma 59392 pgsteal_high 4264660 pgsteal_normal 15171368 pgsteal_dma32 0 pgsteal_dma 155635 pgscan_kswapd_high 6843616 pgscan_kswapd_normal 23067616 pgscan_kswapd_dma32 0 pgscan_kswapd_dma 212352 pgscan_direct_high 31040 pgscan_direct_normal 94080 pgscan_direct_dma32 0 pgscan_direct_dma 3296 pginodesteal 0 slabs_scanned 128 kswapd_steal 19582040 kswapd_inodesteal 0 pageoutrun 547184 allocstall 274 pgrotated 8 nr_bounce 0 ON A REAL BOX ============= root@Server ~# grep (age |rounds) /proc/zoneinfo rounds 164 age 410 rounds 150 age 396 rounds 150 age 396 root@Server ~# ./show-aging-rate.sh Linux Server 2.6.15-rc5-mm1 #9 SMP Wed Dec 7 16:47:56 CST 2005 i686 GNU/Linux total used free shared buffers cached Mem: 2020 1970 50 0 5 1916 -/+ buffers/cache: 48 1972 Swap: 0 0 0 --------------------------------------------------------------- active/inactive size ratios: DMA0: 132 / 1000 = 123 / 930 Normal0: 161 / 1000 = 28022 / 173838 HighMem0: 177 / 1000 = 43935 / 247952 active/inactive scan rates: DMA: 170 / 1000 = 23889 / ( 118528 + 21216) Normal: 210 / 1000 = 5296960 / ( 24645696 + 484160) HighMem: 239 / 1000 = 8501024 / ( 34741600 + 752000) --------------------------------------------------------------- inactive size ratios: DMA0 / Normal0: 53 / 10000 = 930 / 173838 Normal0 / HighMem0: 7010 / 10000 = 173838 / 247952 inactive scan rates: DMA / Normal: 55 / 10000 = ( 118528 + 21216) / ( 24645696 + 484160) Normal / HighMem: 7080 / 10000 = ( 24645696 + 484160) / ( 34741600 + 752000) pageoutrun / allocstall = 73374 / 100 = 1072730 / 1461 - 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/