From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Pratt Subject: Re: Updated performance results Date: Fri, 07 Aug 2009 08:56:52 -0500 Message-ID: <4A7C32A4.9070106@austin.ibm.com> References: <4A68AD69.4030803@dangyankee.net> <20090723210051.GB1040@think> <4A68DE81.3020505@dangyankee.net> <20090724132407.GC16192@think> <20090724140002.GD16192@think> <4A6F5BB6.4020204@austin.ibm.com> <20090728202355.GC13940@think> <4A6F6951.9020304@austin.ibm.com> <20090805203526.GE12524@think> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed To: Chris Mason , Steven Pratt , linux-btrfs Return-path: In-Reply-To: <20090805203526.GE12524@think> List-ID: Chris Mason wrote: > On Tue, Jul 28, 2009 at 04:10:41PM -0500, Steven Pratt wrote: > >>> Hi Steve, >>> >>> I think I'm going to start tuning something other than the >>> random-writes, there is definitely low hanging fruit in the large file >>> creates workload ;) Thanks again for posting all of these. >>> >> Sure, no problem. >> >> >>> The history graph has 2.6.31-rc btrfs against 2.6.29-rc ext4. Have you >>> done more recent runs on ext4? >>> >>> >> Yes, thanks for pointing that out, had so many issues I forgot to >> update the graphs for other file systems. Just pushed new graphs >> with data for 2.6.30-rc7 for all the other file systems. This was >> from your "newformat" branch from June 6th. >> > > I've been tuning the 128 thread large file streaming writes, and found > some easy optimizations. While I'm fixing up these patches, could you > please do a streaming O_DIRECT write test run for me? I think buffered > writeback in general has some problems right now on high end arrays. > > On my box 2.6.31-rc5 streaming buffered write with xfs only got at > 200MB/s (with the 128 thread ffsb workload). Buffered btrfs goes at > 175MB/s. > > O_DIRECT btrfs runs at 390MB/s, while XFS varies a bit between 330MB/s > and 250MB/s. > > I'm using a 1MB write blocksize. > On my todo list, but am swamped this week trying to get ready for vacation. Will try to get to it as soon as I can. Stee > -chris >