From owner-freebsd-questions@freebsd.org Wed Jun 21 16:23:30 2017 Return-Path: Delivered-To: freebsd-questions@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 7DB01D932E8 for ; Wed, 21 Jun 2017 16:23:30 +0000 (UTC) (envelope-from amutu@amutu.com) Received: from mail-ot0-x235.google.com (mail-ot0-x235.google.com [IPv6:2607:f8b0:4003:c0f::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4250672A44 for ; Wed, 21 Jun 2017 16:23:30 +0000 (UTC) (envelope-from amutu@amutu.com) Received: by mail-ot0-x235.google.com with SMTP id y47so93474369oty.0 for ; Wed, 21 Jun 2017 09:23:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amutu-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=ZCO6e9Tuoi9yh+QF31QD/z/HE/W1+jJByDvDRPrSY68=; b=ajprMmgWm2koHI83BbeuWZvmOrQH5xcUUXR1kUMpb4veUcR6HyIYUOPUbnOJ0PLkhs yW/a0cSilK8d2paHE4FGCnmnOoEDIQWdAIUOKbWl3i4PJP7iIfDQHBHZuR9OLOaCTOuX hPV9JV+EAj70etFvQKbNR/wxhzzSejBIW70CHxbYpzJC7pgnQaoYp3GLI+f49SpAPAoG 0gm4YMH2yBg5TV4B+sDCQ79zE4EYYmLICBQws9dwsldOkycduD0V38hkWYASZh1D5Vrc Dmu/Nihd0nAzPSz75S1L6ztu48/gqoDVixbwG2G2ZX44CalS6hEL+SzqiEIox6MHK4dd 0VeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=ZCO6e9Tuoi9yh+QF31QD/z/HE/W1+jJByDvDRPrSY68=; b=ObWt5t0oAq8ly4wKIZibSYf3i6WkVApiCitEez/iahZusTZSBMC/spar87SEVcefbN bhvR7ZVuzxCdlK6QOf17ToGb1MvTG1TAvihxPMJURl+dQ4MYwzQ7X8rxXgjPWY4YBCzp 7VLdVW9rRHArvRRPdPVX1Zm6zTpOHUQ8XvIlhc1ICPCtG9xMMVRfnd8t+NHKi/7G/+Fl 1S0IpVnzFGp2HypU2qAE1eNEOg5LahsUP8KHHDlnaUKzHQ2kLa7ESNOMHGvfsjePetTj 2dLnsftS1uZsCD4vSnVGYVhO3Rp9ovlx23NoNlLHmkXV0ZbnF6l9E/w042fgo6+Ws9gN uZ+g== X-Gm-Message-State: AKS2vOwEhH1cDOhmhzLzOB+id4ZtHKcBoXNwdWKxeYzvHu5YtrpMbvXj wpYzwzNY7GdqZ877kt76/Q== X-Received: by 10.157.31.76 with SMTP id x12mr18287403otx.103.1498062209019; Wed, 21 Jun 2017 09:23:29 -0700 (PDT) Received: from mail-ot0-f176.google.com (mail-ot0-f176.google.com. [74.125.82.176]) by smtp.gmail.com with ESMTPSA id c130sm8086349oia.10.2017.06.21.09.23.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 21 Jun 2017 09:23:28 -0700 (PDT) Received: by mail-ot0-f176.google.com with SMTP id u13so101375078otd.2 for ; Wed, 21 Jun 2017 09:23:28 -0700 (PDT) X-Received: by 10.157.46.9 with SMTP id q9mr19040117otb.30.1498062208205; Wed, 21 Jun 2017 09:23:28 -0700 (PDT) MIME-Version: 1.0 Received: by 10.74.133.136 with HTTP; Wed, 21 Jun 2017 09:23:27 -0700 (PDT) Received: by 10.74.133.136 with HTTP; Wed, 21 Jun 2017 09:23:27 -0700 (PDT) In-Reply-To: <45657887-638e-bb6d-c318-7046fdea1ca6@tundraware.com> References: <45657887-638e-bb6d-c318-7046fdea1ca6@tundraware.com> From: Jov Date: Thu, 22 Jun 2017 00:23:27 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: FreeBSD and Linux SSD Write Speeds To: Tim Daneliuk Cc: FreeBSD Mailing List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jun 2017 16:23:30 -0000 Try add sync option to dd and write twice of memory size data(16gb for your hw). Jov 2017=E5=B9=B46=E6=9C=8822=E6=97=A5 12:04 AM=EF=BC=8C"Tim Daneliuk" =E5=86=99=E9=81=93=EF=BC=9A Disclaimer: Tests below run on lightly loaded systems, but results are ... surprising: Test Case: dd if=3D/dev/zero of=3Dfoo bs=3D8M count=3D512 Linux 4.4.0-21-generic on a 2.66GHz Core2 Duo w/8GB memory, older OCZ SSD/ext4: 310MB/sec writes FreeBSD 10-STABLE on an 3.2 GHz Quad Core i5 w/8GB memory, newer Kingston SSD/ufs: 210MB/sec writes Results are repeatable. So, what is the likely culprit making FreeBSD 1/3 slower? The FreeBSD system does does / nfs exported (which I don't quite yet understand since all the nfs mount points are below it) at the moment, but there is little or no nfs traffic. _______________________________________________ freebsd-questions@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org= "