From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: xmm2 - monitor Linux MM active/inactive lists graphically References: Reply-To: zlatko.calusic@iskon.hr From: Zlatko Calusic Date: 25 Oct 2001 02:25:45 +0200 In-Reply-To: (Marcelo Tosatti's message of "Wed, 24 Oct 2001 12:26:36 -0200 (BRST)") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: Marcelo Tosatti Cc: Linus Torvalds , linux-mm@kvack.org, lkml List-ID: Marcelo Tosatti writes: > On 24 Oct 2001, Zlatko Calusic wrote: > > > P.S. BTW, 2.4.13 still has very unoptimal writeout performance and > > andrea@suse.de is redirected to /dev/null. > > Zlatko, > > Could you please show us your case of bad writeout performance ? > > Thanks > Sure. Output of 'vmstat 1' follows: 1 0 0 0 254552 5120 183476 0 0 12 24 178 438 2 37 60 0 1 0 0 137296 5232 297760 0 0 4 5284 195 440 3 43 54 1 0 0 0 126520 5244 308260 0 0 0 10588 215 230 0 3 96 0 2 0 0 117488 5252 317064 0 0 0 8796 176 139 1 3 96 0 2 0 0 107556 5264 326744 0 0 0 9704 174 78 0 3 97 0 2 0 0 99552 5268 334548 0 0 0 7880 174 67 0 3 97 0 2 0 0 89448 5280 344392 0 0 0 9804 175 76 0 4 96 0 1 0 0 79352 5288 354236 0 0 0 9852 176 87 0 5 95 0 1 0 0 71220 5300 362156 0 0 4 7884 170 120 0 4 96 0 1 0 0 63088 5308 370084 0 0 0 7936 174 76 0 3 97 0 2 0 0 52988 5320 379924 0 0 0 9920 175 77 0 4 96 0 2 0 0 43148 5328 389516 0 0 0 9548 174 97 0 4 95 0 2 0 0 35144 5336 397316 0 0 0 7820 176 73 0 3 97 0 2 0 0 25172 5344 407036 0 0 0 9724 188 183 0 4 96 0 2 1 0 17300 5352 414708 0 0 0 7744 174 78 0 4 96 0 1 0 0 7068 5360 424684 0 0 0 9920 175 93 0 3 97 0 1 0 0 3128 4132 430132 0 0 0 9920 174 81 0 4 96 Notice how there's planty of RAM. I'm writing sequentially to a file on the ext2 filesystem. The disk I'm writing on is a 7200rpm IDE, capable of ~ 22 MB/s and I'm still getting only ~ 9 MB/s. Weird! -- Zlatko -- 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/