linux-kernel - Re: Slow I/O performance on SAS1064

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Date:	Wed, 5 Mar 2014 22:40:14 +0100
From:	markus <markus@...a.li>
To:	Mark Knecht <markknecht@...il.com>
Cc:	Nagalakshmi Nandigama <Nagalakshmi.Nandigama@....com>,
	Sreekanth Reddy <Sreekanth.Reddy@....com>, support@....com,
	DL-MPTFusionLinux@....com, linux-scsi@...r.kernel.org,
	Linux Kernel List <linux-kernel@...r.kernel.org>
Subject: Re: Slow I/O performance on SAS1064

On Wed, Mar 05, 2014 at 10:21:07AM -0800, Mark Knecht wrote:
> On Wed, Mar 5, 2014 at 9:50 AM, Markus <markus@...a.li> wrote:
> <SNIP>
> 
> > The hdparm result looks like there is somethink not right . There were no features supported but why ?
> 
> 
> Does the HDD have S.M.A.R.T. features? Possibly
> 
> smartctl -a /dev/sda
root@...post:~# smartctl -a /dev/sda
smartctl 5.41 2011-06-09 r3365 [sparc64-linux-3.13.5-mar] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net


Probable ATA device behind a SAT layer
Try an additional '-d ata' or '-d sat' argument.

so i try it with scsi. 

root@...post:~# smartctl -d scsi -a /dev/sda
smartctl 5.41 2011-06-09 r3365 [sparc64-linux-3.13.5-mar] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
Logical Unit id:      0x50000394e2380537
Serial number:                   7365P4KNT
Device type:          disk
Local Time is:        Wed Mar  5 22:32:09 2014 CET
Device supports SMART and is Disabled
Temperature Warning Disabled or Not Supported
SMART Health Status: OK

Error Counter logging not supported
Device does not support Self Test logging


> 
> would provide some additional visibility?
.....
[   98.037209] Uniform Multi-Platform E-IDE driver
[   98.107564] SLAB: Unable to allocate memory on node 0 (gfp=0x40d1)
[   98.188985]   cache: dma-kmalloc-512, object size: 512, order: 0
[   98.268127]   node 0: slabs: 0/0, objs: 0/0, free: 0
[   98.333538] sr: out of memory.
[   98.373628] cdrom: Uniform CD-ROM driver Revision: 3.20
[   98.443390] sr 0:0:0:0: Attached scsi CD-ROM sr0
[   98.448375] sr 0:0:0:0: Attached scsi generic sg0 type 5
[  103.198705] scsi2 : ioc0: LSISAS1064 A3, FwRev=01080400h, Ports=1, MaxQ=511, IRQ=10
[  103.329805] mptsas: ioc0: attaching sata device: fw_channel 0, fw_id 0, phy 0, sas_addr 0x1221000000000000
[  103.462762] scsi 2:0:0:0: Direct-Access     ATA      TOSHIBA MQ01ABB2 0U   PQ: 0 ANSI: 5
[  103.571610] scsi 2:0:0:0: Attached scsi generic sg1 type 0
[  103.645418] mptsas: ioc0: attaching sata device: fw_channel 0, fw_id 1, phy 1, sas_addr 0x1221000001000000
[  103.777635] scsi 2:0:1:0: Direct-Access     ATA      TOSHIBA MQ01ABB2 0U   PQ: 0 ANSI: 5
[  103.886607] scsi 2:0:1:0: Attached scsi generic sg2 type 0
[  103.960517] mptsas: ioc0: attaching sata device: fw_channel 0, fw_id 2, phy 2, sas_addr 0x1221000002000000
[  104.093109] scsi 2:0:2:0: Direct-Access     ATA      TOSHIBA MQ01ABB2 0U   PQ: 0 ANSI: 5
[  104.201973] scsi 2:0:2:0: Attached scsi generic sg3 type 0
[  104.275830] mptsas: ioc0: attaching sata device: fw_channel 0, fw_id 3, phy 3, sas_addr 0x1221000003000000
[  104.408412] scsi 2:0:3:0: Direct-Access     ATA      TOSHIBA MQ01ABB2 0U   PQ: 0 ANSI: 5
[  104.517379] scsi 2:0:3:0: Attached scsi generic sg4 type 0
[  104.618997] sd 2:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[  104.721185] sd 2:0:3:0: [sdd] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[  104.823771] sd 2:0:1:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[  104.824017] sd 2:0:2:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[  104.828691] sd 2:0:0:0: [sda] Write Protect is off
[  104.828697] sd 2:0:0:0: [sda] Mode Sense: 67 00 00 08
[  104.829940] sd 2:0:2:0: [sdc] Write Protect is off
[  104.829945] sd 2:0:2:0: [sdc] Mode Sense: 67 00 00 08
[  104.830488] sd 2:0:3:0: [sdd] Write Protect is off
[  104.830493] sd 2:0:3:0: [sdd] Mode Sense: 67 00 00 08
[  104.833225] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  104.834471] sd 2:0:2:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  104.835118] sd 2:0:3:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  105.583175] sd 2:0:1:0: [sdb] Write Protect is off
[  105.623801]  sda: sda1 sda2 sda3
[  105.651118]  sdc: sdc1 sdc9
[  105.654024]  sdd: sdd1 sdd9
[  105.761966] sd 2:0:1:0: [sdb] Mode Sense: 67 00 00 08
[  105.769029] sd 2:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  105.775293] sd 2:0:2:0: [sdc] Attached SCSI disk
[  105.775941] sd 2:0:3:0: [sdd] Attached SCSI disk
[  106.014357] sd 2:0:0:0: [sda] Attached SCSI disk
[  106.158864]  sdb: sdb1 sdb9
[  106.205879] sd 2:0:1:0: [sdb] Attached SCSI disk
[  106.502387] random: nonblocking pool is initialized
[  106.792978] device-mapper: uevent: version 1.0.3
[  106.861434] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: dm-devel@...hat.com
[  108.085062] bio: create slab <bio-1> at 1
.....
> 
> - Mark

Markus

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