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Date: Thu, 20 Aug 2009 15:20:01 +0300 From: Pasi Kärkkäinen <pasik@....fi> To: Nick Cheng <nick.cheng@...ca.com.tw> Cc: 'Andrew Morton' <akpm@...ux-foundation.org>, 'Michael Fuckner' <michael@...kner.net>, linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org Subject: Re: Performance issues with Areca 1680 SAS Controllers On Thu, Aug 20, 2009 at 08:18:44PM +0800, Nick Cheng wrote: > It could improve the performance with F/W v1.47. > Ok. Thanks! -- Pasi > -----Original Message----- > From: Pasi Kärkkäinen [mailto:pasik@....fi] > Sent: Thursday, August 20, 2009 8:16 PM > To: Nick Cheng > Cc: 'Andrew Morton'; 'Michael Fuckner'; linux-kernel@...r.kernel.org; > linux-scsi@...r.kernel.org > Subject: Re: Performance issues with Areca 1680 SAS Controllers > > On Thu, Aug 20, 2009 at 12:56:04PM +0300, Pasi Kärkkäinen 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. > > > > Thanks! I'll give it a try today and report back. > > > > v1.47 firmware seems to fix this problem! The system behaves _much_ better > now even when Areca is busy flushing it's cache! > > 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 > > > > > > Thank you, > > > -----Original Message----- > > > From: Pasi Kärkkäinen [mailto:pasik@....fi] > > > Sent: Wednesday, August 19, 2009 10:09 PM > > > To: Nick Cheng > > > Cc: 'Andrew Morton'; 'Michael Fuckner'; linux-kernel@...r.kernel.org; > > > linux-scsi@...r.kernel.org; 'Erich Chen' > > > Subject: Re: Performance issues with Areca 1680 SAS Controllers > > > > > > 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, > > > > > > > > > > Hello, > > > > > > Was this issue resolved? I'm seeing similar behaviour.. I think it's > related > > > to flushing the controller cache? > > > > > > Waiting a while (after the disk leds stop blinking) performance is back > to > > > normal.. > > > > > > -- Pasi > > > > > > > -----Original Message----- > > > > From: Andrew Morton [mailto:akpm@...ux-foundation.org] > > > > Sent: Thursday, November 20, 2008 9:18 AM > > > > To: Michael Fuckner > > > > Cc: linux-kernel@...r.kernel.org; linux-scsi@...r.kernel.org; Nick > Cheng; > > > > Erich Chen > > > > Subject: Re: Performance issues with Areca 1680 SAS Controllers > > > > > > > > (cc's added) > > > > > > > > On Wed, 19 Nov 2008 13:16:56 +0100 > > > > Michael Fuckner <michael@...kner.net> wrote: > > > > > > > > > Hi, > > > > > > > > > > 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 it > with > > > > > XFS. The Controller has 512MB RAM and a BBU. The OS is installed to > > > > > another disk attached to the onboard AHCI controller. > > > > > > > > > > After doing some IO, the areca raidset is slower compared to the > rate > > > > > directly > > > > > after boot. > > > > > > > > > > > > > > > [root@...rage ~]# dd if=/dev/sdb1 of=/dev/null bs=1M count=50k > > > > iflag=direct > > > > > 51200+0 records in > > > > > 51200+0 records out > > > > > 53687091200 bytes (54 GB) copied, 59.6494 seconds, 900 MB/s > > > > > [root@...rage ~]# mount /dev/sdb1 /data > > > > > [root@...rage ~]# cd /data/ > > > > > [root@...rage data]# ./iozone -i 0 -i 1 -s 32g -r 16m -S 6144 -t 8 > -+r > > > > > -o >raid6_sync_t8.log > > > > > [root@...rage data]# cd > > > > > [root@...rage ~]# umount /data/ > > > > > [root@...rage ~]# dd if=/dev/sdb1 of=/dev/null bs=1M count=50k > > > > iflag=direct > > > > > 51200+0 records in > > > > > 51200+0 records out > > > > > 53687091200 bytes (54 GB) copied, 76.4036 seconds, 703 MB/s > > > > > > > > > > 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 behaviour. > > > > > > > > > > Idea why the device slows down after IO- or better: how to keep the > high > > > > > rate? Is this reproducible foer Areca SATA Controllers (Type 11XX > and > > > > 12XX) > > > > > > > > > > Regards, > > > > > Michael! > > > > > > > > -- > > > > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > > > > the body of a message to majordomo@...r.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-kernel" in > > the body of a message to majordomo@...r.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-kernel" in > the body of a message to majordomo@...r.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-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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