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 15:20:01 +0300 Message-ID: <20090820122001.GW19938@edu.joroinen.fi> References: <20090820121602.GU19938@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]:57239 "EHLO edu.joroinen.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754136AbZHTMUB (ORCPT ); Thu, 20 Aug 2009 08:20:01 -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 08:18:44PM +0800, Nick Cheng wrote: > It could improve the performance with F/W v1.47. >=20 Ok. Thanks! -- Pasi > -----Original Message----- > From: Pasi K=E4rkk=E4inen [mailto:pasik@iki.fi]=20 > Sent: Thursday, August 20, 2009 8:16 PM > To: Nick Cheng > Cc: 'Andrew Morton'; 'Michael Fuckner'; linux-kernel@vger.kernel.org; > linux-scsi@vger.kernel.org > Subject: Re: Performance issues with Areca 1680 SAS Controllers >=20 > On Thu, Aug 20, 2009 at 12:56:04PM +0300, Pasi K=E4rkk=E4inen wrote: > > 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 t= he > attached > > > driver. > > > Please have a try. > > > Any comments are welcome. > >=20 > > Thanks! I'll give it a try today and report back. > >=20 >=20 > v1.47 firmware seems to fix this problem! The system behaves _much_ b= etter > now even when Areca is busy flushing it's cache!=20 >=20 > I didn't update the driver, only Areca firmware. >=20 > Is there something imported fixed in the latest driver? I'm using the > default driver included in RHEL/CentOS 5.3. >=20 > # modinfo arcmsr.ko > filename: arcmsr.ko > version: Driver Version 1.20.00.15.RH1 2008/02/27 >=20 > -- Pasi >=20 > >=20 > > > 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 i= t's > related > > > to flushing the controller cache? > > >=20 > > > Waiting a while (after the disk leds stop blinking) performance i= s back > 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; N= ick > 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 (Seag= ate 1TB > > > > > ST31000640SS). I set up a Raid6 with all 16 disks and formatt= ed it > with > > > > > XFS. The Controller has 512MB RAM and a BBU. The OS is instal= led 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 co= unt=3D50k > > > > 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 co= unt=3D50k > > > > 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= , > Debian > > > > > Lenny) and Vanilla kernels 2.6.22-2.6.27, all show this behav= iour. > > > > >=20 > > > > > Idea why the device slows down after IO- or better: how to ke= ep the > 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-kernel" in > > > > the body of a message to majordomo@vger.kernel.org > > > > More majordomo info at http://vger.kernel.org/majordomo-info.h= tml > > > > Please read the FAQ at http://www.tux.org/lkml/ > >=20 > >=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/ >=20 > -- > To unsubscribe from this list: send the line "unsubscribe linux-kerne= l" 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