From owner-freebsd-virtualization@freebsd.org Tue Mar 21 13:55:21 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 B0369D16F1C for ; Tue, 21 Mar 2017 13:55:21 +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 84F2012A8 for ; Tue, 21 Mar 2017 13:55:21 +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 v2LDtLLZ084526 for ; Tue, 21 Mar 2017 13:55:21 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, but not only) Date: Tue, 21 Mar 2017 13:55:21 +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: hellrider8881@yahoo.com 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: 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: Tue, 21 Mar 2017 13:55:21 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759 --- Comment #16 from deJong --- I have tested the patch set and unfortunately it made no difference root@testbsd11:~ # sysctl kern.timecounter.choice kern.timecounter.choice: TSC-low(-100) i8254(0) ACPI-fast(900) HPET(950) dummy(-1000000) root@testbsd11:~ # sysbench --num-threads=3D1 --test=3Dmemory --memory-total-size=3D1G --memory-block-size=3D1K 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: 1024M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 1048576 (34976.80 ops/sec) 1024.00 MB transferred (34.16 MB/sec) Test execution summary: total time: 29.9792s total number of events: 1048576 total time taken by event execution: 21.9685 per-request statistics: min: 0.02ms avg: 0.02ms max: 22.21ms approx. 95 percentile: 0.01ms Threads fairness: events (avg/stddev): 1048576.0000/0.00 execution time (avg/stddev): 21.9685/0.00 So either the problem is somewhere else or these patches does not apply to = this situation, it would be good if someone can confirm or deny this. --=20 You are receiving this mail because: You are the assignee for the bug.=