From owner-freebsd-virtualization@freebsd.org Wed Feb 22 09:05:28 2017 Return-Path: Delivered-To: freebsd-virtualization@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5B724CE7D29 for ; Wed, 22 Feb 2017 09:05:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4A3BE92A for ; Wed, 22 Feb 2017 09:05:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v1M95RJQ003997 for ; Wed, 22 Feb 2017 09:05:28 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 216759] [kern] Memory speed with small blocks (1K) up to 35 times slower than host system under QEMU emulation Date: Wed, 22 Feb 2017 09:05:27 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: robak@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Feb 2017 09:05:28 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759 Bartek Rutkowski changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |robak@freebsd.org --- Comment #5 from Bartek Rutkowski --- Here are some results from the tests on a 12-C vm under XenServer: VM: FreeBSD poudriere 12.0-CURRENT FreeBSD 12.0-CURRENT #3 r314028: Tue Feb= 21 08:07:02 CET 2017=20=20=20=20 root@pd.valinor.palantiri.org:/usr/obj/usr/src/sys/POUDRIERE amd64 XenServer: Linux xenserver 3.10.0+10 #1 SMP Thu Sep 22 12:31:44 UTC 2016 x8= 6_64 x86_64 x86_64 GNU/Linux, Xen version: 4.6.1-xs133690 DD on 8G mdisk: # dd if=3D/dev/zero of=3D/dev/md1 bs=3D1M dd: /dev/md1: end of device 8193+0 records in 8192+0 records out 8589934592 bytes transferred in 15.565112 secs (551871047 bytes/sec) # dd if=3D/dev/zero of=3D/dev/md1 bs=3D1K dd: /dev/md1: end of device 8388609+0 records in 8388608+0 records out 8589934592 bytes transferred in 232.354641 secs (36969068 bytes/sec) Sysbench: # sysbench --num-threads=3D1 --test=3Dmemory --memory-total-size=3D8G run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Doing memory operations speed test Memory block size: 1K Memory transfer size: 8192M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 8388608 (1169942.57 ops/sec) 8192.00 MB transferred (1142.52 MB/sec) Test execution summary: total time: 7.1701s total number of events: 8388608 total time taken by event execution: 5.2679 per-request statistics: min: 0.00ms avg: 0.00ms max: 3.95ms approx. 95 percentile: 0.00ms Threads fairness: events (avg/stddev): 8388608.0000/0.00 execution time (avg/stddev): 5.2679/0.00 # sysbench --num-threads=3D1 --test=3Dmemory --memory-total-size=3D8G --memory-block-size=3D1M run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Doing memory operations speed test Memory block size: 1024K Memory transfer size: 8192M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 8192 (46849.56 ops/sec) 8192.00 MB transferred (46849.56 MB/sec) Test execution summary: total time: 0.1749s total number of events: 8192 total time taken by event execution: 0.1727 per-request statistics: min: 0.02ms avg: 0.02ms max: 0.08ms approx. 95 percentile: 0.03ms Threads fairness: events (avg/stddev): 8192.0000/0.00 execution time (avg/stddev): 0.1727/0.00 --=20 You are receiving this mail because: You are the assignee for the bug.=