From owner-freebsd-questions@FreeBSD.ORG Thu Jan 17 03:55:56 2013 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 9759F746 for ; Thu, 17 Jan 2013 03:55:56 +0000 (UTC) (envelope-from lists@eitanadler.com) Received: from mail-lb0-f178.google.com (mail-lb0-f178.google.com [209.85.217.178]) by mx1.freebsd.org (Postfix) with ESMTP id 0B62D835 for ; Thu, 17 Jan 2013 03:55:55 +0000 (UTC) Received: by mail-lb0-f178.google.com with SMTP id l5so1566277lbo.9 for ; Wed, 16 Jan 2013 19:55:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eitanadler.com; s=0xdeadbeef; h=x-received:mime-version:in-reply-to:references:from:date:message-id :subject:to:content-type; bh=cNNPLUl1d3nliO0vTElTwTnl/67loMTgGwM/9aboMLE=; b=P+dwxEpImTdKc0aeJZIAIaDhZnvwFckJ3h0bHRMCHUAA/lb0GUudrtOhPP3XhIZDQo hQ4Jb7Y19gdr6FbQUsNXDxd9nLW3ChHjDu8gNHdXCItHUeDH81UA2KqEWksFfvMoYu05 6zI2DY7vU3eDTYfB4GmzJLvNGgc2fTF8dj7hI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:mime-version:in-reply-to:references:from:date:message-id :subject:to:content-type:x-gm-message-state; bh=cNNPLUl1d3nliO0vTElTwTnl/67loMTgGwM/9aboMLE=; b=fuIqejJo+huWl88SQylq+ygjMhWOUVZulAWDoxFL8uEgq7TC9AB0Xcw8Rf5s/kyo/S dK8LanfiGIFfupOK765GBaMCRlKB19JzHbxqD28naLhYLxG8ivgy8Nt3hGyVYKdGbYh/ eW0p9AdXwmz8Mnm82VkV9e0MBOPDXs8YnmI8uZeHw15Rts2FgskPmpAVhV33j/tl8CgW SLCkn0dhxUD7MI9rcFGEU3pR0NRj+xEfMjfxcUWQH+23Hw2lb4PynOOn+dF16z162HSg a47NAWCcgF2zkSeLUiACb9rWWN9Abw5qIrSD/eT1UOuEKld2JSr64B0Lsit14S+XUH5P k3Yw== X-Received: by 10.152.110.228 with SMTP id id4mr3311908lab.34.1358394948725; Wed, 16 Jan 2013 19:55:48 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.30.131 with HTTP; Wed, 16 Jan 2013 19:55:18 -0800 (PST) In-Reply-To: References: From: Eitan Adler Date: Wed, 16 Jan 2013 22:55:18 -0500 Message-ID: Subject: Re: absurd I/O perf with ZFS: hangs on zfs->cv) To: questions@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Gm-Message-State: ALoCoQmvm7y96/73AFI6SXgFoqXMcQvH9QBo+/8dPFBVhL67eXWjYM5wygqI15/9FF8Y++/f7ODZ X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2013 03:55:56 -0000 On 15 January 2013 23:57, Eitan Adler wrote: > Hi all. > > > Running FreeBSD 9.1-Release, I am seeing some absurd hangs (10 minutes > or more to open a file) with SIGINFO informing me that the process is > stuck on zio->io_cv. > > Does anyone have any suggestions for what I want to look at to tune > this? This is on a newly bought laptop with large amounts of RAM and > almost nothing else running. It is taking me 45 minutes to make 5 commits to git. Something is wrong here but I have no idea what I should be looking at. Any ideas? -- Eitan Adler