From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nick Cheng" Subject: RE: Performance issues with Areca 1680 SAS Controllers Date: Thu, 20 Aug 2009 20:18:44 +0800 Message-ID: References: <20090820121602.GU19938@edu.joroinen.fi> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from areca.com.tw ([220.130.178.142]:46553 "EHLO areca.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754109AbZHTMSq convert rfc822-to-8bit (ORCPT ); Thu, 20 Aug 2009 08:18:46 -0400 In-Reply-To: <20090820121602.GU19938@edu.joroinen.fi> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: =?iso-8859-1?Q?'Pasi_K=E4rkk=E4inen'?= Cc: 'Andrew Morton' , 'Michael Fuckner' , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org It could improve the performance with F/W v1.47. -----Original Message----- =46rom: 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 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 the attached > > driver. > > Please have a try. > > Any comments are welcome. >=20 > Thanks! I'll give it a try today and report back. >=20 v1.47 firmware seems to fix this problem! The system behaves _much_ bet= ter now even when Areca is busy flushing it's cache!=20 I didn't update the driver, only Areca firmware. Is there something imported fixed in the latest driver? I'm using the default driver included in RHEL/CentOS 5.3. # modinfo arcmsr.ko filename: arcmsr.ko version: Driver Version 1.20.00.15.RH1 2008/02/27 -- Pasi >=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.or= g; > > 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 = 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; Nic= k 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 (Seagat= e 1TB > > > > ST31000640SS). I set up a Raid6 with all 16 disks and formatted= it with > > > > XFS. The Controller has 512MB RAM and a BBU. The OS is installe= d to > > > > another disk attached to the onboard AHCI controller. > > > >=20 > > > > After doing some IO, the areca raidset is slower compared to th= e rate=20 > > > > directly > > > > after boot. > > > >=20 > > > >=20 > > > > [root@storage ~]# dd if=3D/dev/sdb1 of=3D/dev/null bs=3D1M coun= t=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 coun= t=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 behavio= ur. > > > >=20 > > > > Idea why the device slows down after IO- or better: how to keep= the high > > > > rate? Is this reproducible foer Areca SATA Controllers (Type 11= XX 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.htm= l > > > Please read the FAQ at http://www.tux.org/lkml/ >=20 >=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