From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Subject: Re: Performance issues with Areca 1680 SAS Controllers Date: Thu, 20 Aug 2009 12:56:04 +0300 Message-ID: <20090820095604.GT19938@edu.joroinen.fi> References: <20090819140848.GW19938@edu.joroinen.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from edu.joroinen.fi ([194.89.68.130]:50999 "EHLO edu.joroinen.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752640AbZHTJ4E (ORCPT ); Thu, 20 Aug 2009 05:56:04 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Nick Cheng Cc: 'Andrew Morton' , 'Michael Fuckner' , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org On Thu, Aug 20, 2009 at 09:54:27AM +0800, Nick Cheng wrote: > Hi Gentlemen, > We have worked it out with new firmware and driver. > You can download the latest F/W from > ftp://ftp.areca.com.tw/RaidCards/BIOS_Firmware/ARC1680/ and use the a= ttached > driver. > Please have a try. > Any comments are welcome. Thanks! I'll give it a try today and report back. -- Pasi > Thank you, > -----Original Message----- > From: Pasi K=E4rkk=E4inen [mailto:pasik@iki.fi]=20 > Sent: Wednesday, August 19, 2009 10:09 PM > To: Nick Cheng > Cc: 'Andrew Morton'; 'Michael Fuckner'; linux-kernel@vger.kernel.org; > linux-scsi@vger.kernel.org; 'Erich Chen' > Subject: Re: Performance issues with Areca 1680 SAS Controllers >=20 > On Thu, Nov 20, 2008 at 03:39:40PM +0800, Nick Cheng wrote: > > Hi Michael, > > I will get around handling your issue. > > Thanks for your kindly patience, > >=20 >=20 > Hello, >=20 > Was this issue resolved? I'm seeing similar behaviour.. I think it's = related > to flushing the controller cache? >=20 > Waiting a while (after the disk leds stop blinking) performance is ba= ck to > normal..=20 >=20 > -- Pasi >=20 > > -----Original Message----- > > From: Andrew Morton [mailto:akpm@linux-foundation.org]=20 > > Sent: Thursday, November 20, 2008 9:18 AM > > To: Michael Fuckner > > Cc: linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org; Nick = Cheng; > > Erich Chen > > Subject: Re: Performance issues with Areca 1680 SAS Controllers > >=20 > > (cc's added) > >=20 > > On Wed, 19 Nov 2008 13:16:56 +0100 > > Michael Fuckner wrote: > >=20 > > > Hi, > > >=20 > > > I am using an Areca 1680-SAS-Controller with 16 SAS-HDD (Seagate = 1TB > > > ST31000640SS). I set up a Raid6 with all 16 disks and formatted i= t with > > > XFS. The Controller has 512MB RAM and a BBU. The OS is installed = to > > > another disk attached to the onboard AHCI controller. > > >=20 > > > After doing some IO, the areca raidset is slower compared to the = rate=20 > > > directly > > > after boot. > > >=20 > > >=20 > > > [root@storage ~]# dd if=3D/dev/sdb1 of=3D/dev/null bs=3D1M count=3D= 50k > > iflag=3Ddirect > > > 51200+0 records in > > > 51200+0 records out > > > 53687091200 bytes (54 GB) copied, 59.6494 seconds, 900 MB/s > > > [root@storage ~]# mount /dev/sdb1 /data > > > [root@storage ~]# cd /data/ > > > [root@storage data]# ./iozone -i 0 -i 1 -s 32g -r 16m -S 6144 -t = 8 -+r > > > -o >raid6_sync_t8.log > > > [root@storage data]# cd > > > [root@storage ~]# umount /data/ > > > [root@storage ~]# dd if=3D/dev/sdb1 of=3D/dev/null bs=3D1M count=3D= 50k > > iflag=3Ddirect > > > 51200+0 records in > > > 51200+0 records out > > > 53687091200 bytes (54 GB) copied, 76.4036 seconds, 703 MB/s > > >=20 > > > I tested different Versions of Linux (Centos 5.2, OpenSUSE 11, De= bian > > > Lenny) and Vanilla kernels 2.6.22-2.6.27, all show this behaviour= =2E > > >=20 > > > Idea why the device slows down after IO- or better: how to keep t= he high > > > rate? Is this reproducible foer Areca SATA Controllers (Type 11XX= and > > 12XX) > > >=20 > > > Regards, > > > Michael! > >=20 > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-ker= nel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html