From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [PATCH] 2.4.20-rmap15a References: From: Sean Neakums Date: Tue, 03 Dec 2002 16:39:06 +0000 In-Reply-To: (Rik van Riel's message of "Sun, 1 Dec 2002 18:35:50 -0200 (BRST)") Message-ID: <6usmxfys45.fsf@zork.zork.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org Cc: dave@zork.net List-ID: commence Rik van Riel quotation: > This is a merge of rmap15a with marcelo's 2.4 bitkeeper tree, > which is identical to 2.4.20-rc4 (he didn't push the makefile > update). The only thing left out of the merge for now is > Andrew Morton's read_latency patch, both because I'm not sure > how needed it is with the elevator updates and because this > part of the merge was too tricky to do at merge time; I'll port > over Andrew Morton's read_latency patch later... I'm seeing a difference in wall-clock time of about nine minutes for an lnx-bbc build (http://www.lnx-bbc.org/). Dave Barry, another lnx-bbc developer, has observed something similar. The difference in system times seems to be above noise, too. Both of the kernels I used also had Stephen Tweedie's ext3 updates for 2.4.20 applied[0]. I can retest without, if you wish. I believe Dave's kernels had only rmap applied, however. 2.4.20: real 106m26.147s user 62m54.340s sys 26m54.670s 2.4.20-rmap15a: real 115m5.283s user 63m50.580s sys 29m34.520s I used ccache with these builds and they are almost entirely cached (the big exception being gcc), so the job becomes fairly I/O-bound as a result. The builds are quite big: the CVS tree unpacks and builds about three hundred megabytes of source, resulting in a build footprint of approximately 2.9GiB. The volume I used for the build is formatted as ext3, with htree activated. (I originally started using those patches because I had found that previous htree patches b0rked during an lnx-bbc build.) [0] http://people.redhat.com/sct/patches/ext3-2.4/dev-20021115/ -- / | [|] Sean Neakums | Questions are a burden to others; [|] | answers a prison for oneself. \ | -- 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/