From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mel Gorman Subject: [MMTests] dbench4 async on ext4 Date: Mon, 23 Jul 2012 22:23:27 +0100 Message-ID: <20120723212327.GH9222@suse.de> References: <20120620113252.GE4011@suse.de> <20120629111932.GA14154@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org To: linux-mm@kvack.org Return-path: Content-Disposition: inline In-Reply-To: <20120629111932.GA14154@suse.de> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org Configuration: global-dhp__io-dbench4-async-ext4 Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext4 Benchmarks: dbench4 Summary ======= Nothing majorly exciting although throughput has been declining slightly in a number of cases. However, this is not consistent between machines and latency has also been variable. Broadly speaking, there is not need to take any action here. Benchmark notes =============== mkfs was run on system startup. No attempt was made to age it. No special mkfs or mount options were used. dbench 4 was used. Tests ran for 180 seconds once warmed up. A varying number of clients were used up to 64*NR_CPU. osync, sync-directory and fsync were all off. =========================================================== Machine: arnold Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext4/arnold/comparison.html Arch: x86 CPUs: 1 socket, 2 threads Model: Pentium 4 Disk: Single Rotary Disk =========================================================== dbench4 ------- In very vague terms, throughput has been getting worse over time but it's very gradual. Latency has also been getting worse. ========================================================== Machine: hydra Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext4/hydra/comparison.html Arch: x86-64 CPUs: 1 socket, 4 threads Model: AMD Phenom II X4 940 Disk: Single Rotary Disk Status: Ok ========================================================== dbench4 ------- This is a mixed bag, there are gains and losses and it's hard to draw any meaningful conclusion. ========================================================== Machine: sandy Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-dbench4-async-ext4/sandy/comparison.html Arch: x86-64 CPUs: 1 socket, 8 threads Model: Intel Core i7-2600 Disk: Single Rotary Disk Status: ========================================================== dbench4 ------- For the most part, there are few changes of note. Latency has been getting better particularly in 3.2 and later kernels. -- Mel Gorman SUSE Labs -- 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