From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 22 Feb 2004 23:19:03 -0800 From: Andrew Morton Subject: Re: LTP VM test slower under 2.6.3 than 2.4.20 Message-Id: <20040222231903.5f9ead5c.akpm@osdl.org> In-Reply-To: <40363778.20900@movaris.com> References: <40363778.20900@movaris.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Kirk True Cc: kernelnewbies@nl.linux.org, Linux-MM@kvack.org List-ID: Kirk True wrote: > > Executing the LTP "mem01" VM test shows a huge time discrepancy between > 2.4.20 and 2.6.3. Under 2.4.20 the total time is around 5 seconds, while > under 2.6.3 the system seems to hang for nearly a minute. I'd be wondering if your disk system is correctly running in DMA mode. On my 256MB test box, mem01 takes 31 seconds under 2.4.25, 25 seconds under 2.6.3-mm3. -- 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/ . Don't email: aart@kvack.org