Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 30 Oct 2001 14:07:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Oct 2001 14:07:15 -0500 Received: from femail30.sdc1.sfba.home.com ([24.254.60.20]:39812 "EHLO femail30.sdc1.sfba.home.com") by vger.kernel.org with ESMTP id ; Tue, 30 Oct 2001 14:07:08 -0500 Date: Tue, 30 Oct 2001 14:07:38 -0500 To: lkml Subject: Re: xmm2 - monitor Linux MM active/inactive lists graphically Message-ID: <20011030140738.A2847@cy599856-a.home.com> Mail-Followup-To: lkml In-Reply-To: <20011030095606.I618@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.23i X-Editor: GNU Emacs 21.1 X-Operating-System: Debian GNU/Linux 2.4.13-ac4 i586 K6-3+ X-Uptime: 13:30:20 up 6 min, 2 users, load average: 1.09, 0.63, 0.27 From: Josh McKinney Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On approximately Tue, Oct 30, 2001 at 10:26:32AM +0100, Zlatko Calusic wrote: > > Followup on the problem. Yesterday I was upgrading my Debian Linux. To > do that I have to remount /usr read-write. After the update finished, > I tested once again disk writing speed. And there it was, full > 22MB/sec (on the same partition). And once I get to that point, disk > will remain performant. Then I thought (poor man's logic) that poor > performance might have something to do with my /usr mounted read-only > (BTW, it's on the same disk I'm having problems with). > > Quick test: reboot (/usr is ro), check speed -> only 8MB/sec, remount > /usr rw, but unfortunately didn't help, writing speed remains low. > > So it was just an idea. I still don't know what can be done to return > speed to normal. I don't know if I have mentioned, but reading from > the same disk is always going at the full speed. > > So, something might be wrong with my setup, but I'm still unable to > find what. > > I'm compiling with 2.95.4 20011006 (Debian prerelease) from the Debian > unstable distribution. Kernel is completely monolithic (no modules). > I am also seeing some not_so_great performance from my ide drive. It is a IBM 30GB 7200rpm drive on a promise ata/100 controller. I am also using Debian unstable, but I hope that isn't really the problem. The vmstat output seems very erratic. It has large bursts then really slow spots. I am running 2.4.13-ac4, with rik's swapoff patch. This is the command I used. time nice -n -20 dd if=/dev/zero of=/mp3/foobara bs=1024k count=1024 1024+0 records in 1024+0 records out 0.02s user 23.95s system 20% cpu 1:57.24 total And here is the vmstat output... procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 0 0 0 112636 18728 78352 0 0 58 2139 145 90 5 10 85 0 0 3 0 112636 18728 78352 0 0 0 48 115 73 0 5 95 1 0 0 0 91052 18728 99856 0 0 0 65 135 81 0 40 60 1 0 1 0 41900 18728 149008 0 0 0 31474 198 32 1 99 0 0 1 1 0 6104 18756 184748 0 0 0 10608 193 35 1 78 21 0 1 1 0 3064 18768 187756 0 0 0 10296 189 52 0 35 65 0 1 5 0 3060 18796 187704 0 0 0 10808 205 62 2 21 77 0 1 2 0 3064 18948 187412 0 0 0 130132 2654 812 0 23 76 0 1 2 0 3060 18956 187404 0 0 0 10692 188 54 0 26 74 1 0 3 0 3060 18964 187392 0 0 0 9818 199 53 1 26 73 0 1 3 0 3060 18976 187368 0 0 0 7308 186 52 1 23 76 0 3 2 0 3068 19016 187296 0 0 0 73788 1459 417 0 23 77 0 3 3 0 3076 19444 186436 0 0 0 6392 188 31 1 9 90 0 3 3 0 3076 19444 186436 0 0 0 10832 188 15 0 2 98 0 3 3 0 3076 19444 186436 0 0 0 10536 188 17 0 4 96 0 3 2 0 3076 19444 186436 0 0 0 6556 191 31 0 1 99 2 0 0 0 3064 19444 186448 0 0 0 17424 724 120 0 9 91 1 0 1 0 3064 19444 186896 0 0 0 22724 201 33 2 98 0 0 1 1 0 3064 19444 186540 0 0 0 9872 187 47 1 46 53 0 1 1 0 3060 19444 186464 0 0 0 2840 193 57 0 15 85 0 1 1 0 3060 19444 186464 0 0 0 11088 201 54 0 19 81 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 2 0 3060 19500 186360 0 0 0 118288 2232 604 0 25 75 0 3 2 0 3060 19500 186360 0 0 0 7748 185 57 1 1 98 0 3 2 0 3060 19500 186360 0 0 0 11776 184 54 0 2 98 0 3 2 0 3060 19500 186360 0 0 0 7924 181 52 0 1 99 0 3 2 0 3060 19500 186360 0 0 0 4776 182 64 0 1 99 0 3 1 0 3060 19500 186360 0 0 0 952 183 50 0 2 98 0 3 1 0 3060 19500 186360 0 0 0 0 180 48 0 1 99 1 0 2 0 3064 19500 186356 0 0 0 296 242 80 0 12 88 0 1 0 0 3060 19500 186360 0 0 0 19668 730 282 1 7 93 0 1 0 0 3060 19500 186360 0 0 0 6764 200 133 1 2 97 1 0 0 0 3064 19500 186356 0 0 0 16680 171 123 1 64 35 1 0 1 0 3060 19500 186360 0 0 0 26903 193 33 1 99 0 0 1 1 0 3064 19500 186356 0 0 0 7756 184 40 1 54 45 0 1 5 0 3060 19500 186360 0 0 0 10915 182 66 0 23 77 0 3 3 0 3060 19668 186024 0 0 0 105102 2059 629 0 18 82 0 3 3 0 3060 19668 186024 0 0 0 7772 181 59 0 1 99 0 4 1 0 3060 19668 185948 0 0 1 7440 187 68 0 2 98 0 4 1 0 3060 19668 185948 0 0 0 260 187 57 0 2 98 0 4 1 0 3064 19668 185948 0 0 0 0 181 69 0 1 99 0 5 2 0 3276 19668 185944 0 0 5 522 180 69 3 5 92 1 1 2 0 3064 19668 185740 0 0 25 26593 190 96 0 78 22 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 4 4 0 3064 19788 184768 0 0 13 99062 2190 647 0 20 79 0 4 1 0 3064 19788 184768 0 0 0 2440 218 57 0 3 97 0 4 1 0 3064 19788 184768 0 0 1 0 217 51 0 0 100 1 1 5 0 3060 19788 185148 0 0 24 14692 214 108 2 46 52 0 4 2 0 3064 19824 185068 0 0 8 19965 940 240 0 24 75 0 4 2 0 3064 19824 185068 0 0 0 3224 293 64 0 0 100 0 4 2 0 3064 19824 185068 0 0 0 4624 310 64 0 3 97 0 4 2 0 3140 19824 184864 0 0 4 3316 245 86 1 4 95 0 4 2 0 3140 19824 184864 0 0 0 2608 252 58 0 1 99 0 4 2 0 3140 19824 184864 0 0 0 6208 262 58 0 0 100 1 3 2 0 3144 19824 184864 0 0 0 11864 228 58 1 1 98 0 4 1 0 3140 19824 184864 0 0 4 1200 241 86 1 5 94 0 4 3 0 3140 19824 184864 0 0 0 27 182 51 0 1 99 1 1 3 0 3064 19824 184936 0 0 16 24423 183 104 1 61 38 0 3 6 0 3064 19940 183904 0 0 69 44339 995 314 1 25 74 0 3 5 0 3064 19940 183904 0 0 0 100 180 51 0 0 100 0 3 5 0 3064 19940 183904 0 0 0 0 187 50 0 1 99 -- Linux, the choice | "Shelter," what a nice name for for a place of a GNU generation -o) | where you polish your cat. 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