From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <463F37A8.1020009@tmr.com> Date: Mon, 07 May 2007 10:28:56 -0400 From: Bill Davidsen MIME-Version: 1.0 Subject: Re: swap-prefetch: 2.6.22 -mm merge plans References: <20070430162007.ad46e153.akpm@linux-foundation.org> <463AE1EB.1020909@yahoo.com.au> <20070504085201.GA24666@elte.hu> <200705042210.15953.kernel@kolivas.org> In-Reply-To: <200705042210.15953.kernel@kolivas.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Con Kolivas Cc: Ingo Molnar , Nick Piggin , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: Con Kolivas wrote: > On Friday 04 May 2007 18:52, Ingo Molnar wrote: >> agreed. Con, IIRC you wrote a testcase for this, right? Could you please >> send us the results of that testing? > > Yes, sorry it's a crappy test app but works on 32bit. Timed with prefetch > disabled and then enabled swap prefetch saves ~5 seconds on average hardware > on this one test case. I had many users try this and the results were between > 2 and 10 seconds, but always showed a saving on this testcase. This effect > easily occurs on printing a big picture, editing a large file, compressing an > iso image or whatever in real world workloads. Smaller, but much more > frequent effects of this over the course of a day obviously also occur and do > add up. > I'll try this when I get the scheduler stuff done, and also dig out the "resp1" stuff for "back when." I see the most recent datasets were comparing 2.5.43-mm2 responsiveness with 2.4.19-ck7, you know I always test your stuff ;-) Guess it might need a bit of polish for current hardware, I was testing on *small* machines, deliberately. -- Bill Davidsen "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot -- 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: email@kvack.org