From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Cameron Davies Date: Tue, 30 May 2006 18:32:05 +1000 (EST) Subject: Re: [Patch 0/17] PTI: Explation of Clean Page Table Interface In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: owner-linux-mm@kvack.org Return-Path: To: Jes Sorensen Cc: linux-mm@kvack.org List-ID: Hi Jes It is currently causing a degradation, but we are in the process of performance tuning. There is a small cost associated with the PTI at the moment. Cheers Paul On Tue, 30 May 2006, Jes Sorensen wrote: >>>>>> "Paul" == Paul Cameron Davies writes: > > Paul> This patch series provides the architectural independent > Paul> interface. It has been tested and benchmarked for IA64 using > Paul> lmbench. It also passes all relevant tests in the Linux Test > Paul> Project (LTP) on IA64. This patch should 5~also compile and run > Paul> for i386. To run on other architectures add CONFIG_DEFAULT_PT > Paul> to the architectures config. Turn off HugeTLB. > > Paul> Summary of performance degradation using lmbench on IA64: ~3.5% > Paul> deterioration in fork latency on IA64. ~1.0% deterioration in > Paul> mmap latency on IA64 > > Paul, > > Let me just get it right as I am not sure I am reading it correctly. > Are you saying that this patch causes a 3.5% fork performance > degradation on ia64 or are you saying it is improving 3.5%? > > Thanks, > Jes > > -- > 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 > -- 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