From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 26 Jun 2001 10:52:16 -0300 (BRT) From: Marcelo Tosatti Subject: Re: VM tuning through fault trace gathering [with actual code] In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: John Fremlin Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On 26 Jun 2001, John Fremlin wrote: > Marcelo Tosatti writes: > > > On 25 Jun 2001, John Fremlin wrote: > > > > > > > > Last year I had the idea of tracing the memory accesses of the system > > > to improve the VM - the traces could be used to test algorithms in > > > userspace. The difficulty is of course making all memory accesses > > > fault without destroying system performance. > > [...] > > > Linux Trace Toolkit (http://www.opersys.com/LTT) does that. > > I dld the ltt-usenix paper and skim read it. It didn't seem to talk > about page faults much. Where should I look? Grab the source and try it out? Example page fault trace: #################################################################### Event Time PID Length Description #################################################################### Trap entry 991,299,585,597,016 678 12 TRAP: page fault; EIP : 0x40067785 -- 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/