From owner-freebsd-questions@FreeBSD.ORG Wed Jan 16 04:58:17 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 07D3AECF for ; Wed, 16 Jan 2013 04:58:17 +0000 (UTC) (envelope-from lists@eitanadler.com) Received: from mail-la0-f45.google.com (mail-la0-f45.google.com [209.85.215.45]) by mx1.freebsd.org (Postfix) with ESMTP id 8C95B7D0 for ; Wed, 16 Jan 2013 04:58:15 +0000 (UTC) Received: by mail-la0-f45.google.com with SMTP id ep20so955655lab.18 for ; Tue, 15 Jan 2013 20:58:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eitanadler.com; s=0xdeadbeef; h=x-received:mime-version:from:date:message-id:subject:to :content-type; bh=ph5HFtlPuQ/BpgT1IYogBa8ewHw4wWTdyFEdaIVonbA=; b=tWrTtiVD1iOXaSxhI6JHrokdUvGur80BJ9CG+wNRZlgJB7laFe3XZyKZKcBT6BzqA5 KFUo4tbqjlZnqg5iVtO2rX8B09bSWiUZZR/fNg9xU3AGCfRWlkouRbUXNWg03MPkvyGh Ys4TFEvTP+eA4fy8p1ZcAAXPmYBl202U4U9mU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:mime-version:from:date:message-id:subject:to :content-type:x-gm-message-state; bh=ph5HFtlPuQ/BpgT1IYogBa8ewHw4wWTdyFEdaIVonbA=; b=ngtwQSkEBQA/bZS6du2uEEprpXupNEyMFGjyhlU36S3LBoxQfuzbgWzOHBa5TLlyz5 wVHcVI1ObpBXfUjf1WSz2KiHkGoxHCSPc7rgDC5xBEgkh3rDD4bNOhIwDMF+I6lX9wdO rgGx6MkYbASRpKbAETnXrWwF0drGou1DfgHvHMgwy7PpdKZ5h0ElhfzpFTrN7/IS8tzX Q4mr87ZJoW/E92lvlFqzGrBQAD1ec0YThV2o1xWF75fypUVV0+VG8HZal/eWhQGMNkGw 0wQvvM8hv+xScv9p6TWcfd+JeCXBc7AWWR6kwrdWN+W0zRepFU1zMN2DaEEznkjRCvAO r97g== X-Received: by 10.112.82.136 with SMTP id i8mr69878lby.74.1358312294095; Tue, 15 Jan 2013 20:58:14 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.30.131 with HTTP; Tue, 15 Jan 2013 20:57:44 -0800 (PST) From: Eitan Adler Date: Tue, 15 Jan 2013 23:57:44 -0500 Message-ID: Subject: 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: ALoCoQm+JRuKnn0DSZrvv8pI4GGluYOdU6mhBtPSuDG01nDr3nQqeQ6CPOqC0ezZhOs1IMIcaGlR 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: Wed, 16 Jan 2013 04:58:17 -0000 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. Please CC me as I am not subscribed. -- Eitan Adler