From owner-freebsd-bugs@FreeBSD.ORG Sun May 30 18:10:07 2010 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 05780106566C for ; Sun, 30 May 2010 18:10:07 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (unknown [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id D7FD28FC1F for ; Sun, 30 May 2010 18:10:06 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o4UIA6j9023257 for ; Sun, 30 May 2010 18:10:06 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o4UIA6BO023256; Sun, 30 May 2010 18:10:06 GMT (envelope-from gnats) Resent-Date: Sun, 30 May 2010 18:10:06 GMT Resent-Message-Id: <201005301810.o4UIA6BO023256@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Brandon Falk Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 714EE1065675 for ; Sun, 30 May 2010 18:04:01 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id 60B328FC08 for ; Sun, 30 May 2010 18:04:01 +0000 (UTC) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id o4UI40Nf052554 for ; Sun, 30 May 2010 18:04:00 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id o4UI40FG052550; Sun, 30 May 2010 18:04:00 GMT (envelope-from nobody) Message-Id: <201005301804.o4UI40FG052550@www.freebsd.org> Date: Sun, 30 May 2010 18:04:00 GMT From: Brandon Falk To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/147227: SSD preformance issues X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 May 2010 18:10:07 -0000 >Number: 147227 >Category: misc >Synopsis: SSD preformance issues >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun May 30 18:10:06 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Brandon Falk >Release: 8.0-RELEASE >Organization: Gamozo >Environment: FreeBSD localhost 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08 UTC 2009 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >Description: I have an SSD that is rated at 285MB/s read, 275MB/s write, and 250MB/s sustained write. On Linux, I easily sustain all these speeds, but on FreeBSD I happen to only get about 108 MB/s write, and 116MB/s read. Another thing I noticed is that my drive is only running at SATA 150, even though my drive is SATA 300 and my controller is also detected as SATA 300. *snip from dmesg* atapci1: port 0xc400-0xc407,0xc080-0xc083,0xc000-0xc007,0xbc00-0xbc03,0xb880-0xb88f irq 19 at device 31.2 on pci0 ad4: 47703MB at ata2-master SATA150 *snip from dmesg* I do not have an AHCI setting in my BIOS, so that is not something that I can change, but still Linux happens to preform perfectly fine with the drive, so it has to be something to do with FreeBSD. >How-To-Repeat: Always occurs. >Fix: Unknown. >Release-Note: >Audit-Trail: >Unformatted: