Very slow I/O performance on HP BL465c

[Nathan Le Nevez]

# vmstat -i
interrupt                          total       rate
irq1: atkbd0                          18          0
irq5: ohci0 ohci1+                     1          0
irq19: ciss0                      144916          3
irq21: uhci0                          22          0
cpu0: timer                     80002970       1999
irq256: bce0                       17042          0
cpu2: timer                     79994902       1999
cpu1: timer                     79994975       1999
cpu3: timer                     79995009       1999
cpu6: timer                     79994957       1999
cpu5: timer                     79995046       1999
cpu4: timer                     79995041       1999
cpu7: timer                     79995057       1999
Total                          640129956      16000

# camcontrol tags da0
(pass0:ciss0:0:0:0): device openings: 254

Just for clarification, both systems are running amd64.

Thanks,

Nathan

-----Original Message-----
From: Krassimir Slavchev [mailto:krassi at bulinfo.net] 
Sent: Tuesday, 11 August 2009 9:45 PM
To: Nathan Le Nevez
Cc: freebsd-performance at freebsd.org
Subject: Re: Very slow I/O performance on HP BL465c

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Hi,

What is the output of 'vmstat -i' and 'camcontrol tags da0' ?
I have a ML350 running 7-STABLE with same controller and disks and
performance is almost same as your good server.

Nathan Le Nevez wrote:
> Hi,
> 
> I'm running 7.2-p3 on 2x HP BL465c blade servers, one of which performs very
> poorly. Both have the same RAID controller and 2 x 146GB 10k SAS disks
> configured in RAID-1. Both controllers have write-cache enabled. Both
> servers are running the same BIOS and firmware versions. Neither servers are
> running any services other than sshd.
> 
> Blade with good performance (2 x Opteron 2218, 8GB RAM):
> 
> ciss0: <HP Smart Array E200i> port 0x4000-0x40ff mem
> 0xfdf80000-0xfdffffff,0xfdf70000-0xfdf77fff irq 19 at device 8.0 on pci80
> ciss0: [ITHREAD]
> da0 at ciss0 bus 0 target 0 lun 0
> da0: <COMPAQ RAID 1  VOLUMES MOPK:>  AFPi xCePdU  D#i2r Leacuntc hAcecde!s
> s SCSI-5 device
> da0: 135.168MB/s transfers
> dSaM0P::  CAoP CPU #3 Launched!
> mmand Queueing Enabled
> da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C)
> 
> Blade with bad performance (2 x Opteron 2352, 16GB RAM):
> 
> ciss0: <HP Smart Array E200i> port 0x4000-0x40ff mem
> 0xfdf80000-0xfdffffff,0xfdf70000-0xfdf77fff irq 19 at device 8.0 on pci80
> ciss0: [ITHREAD]
> da0 at ciss0 bus 0 target 0 lun 0
> da0: <COMPAQ RAID 1  VOLUME OK> Fixed Direct Access SCSI-5 device
> da0: 135.168MB/s transfers
> da0: Command Queueing Enabled
> da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C)
> 
> # dbench -t 10  1              2              3             4
> blade1          183.456 MB/sec 236.86 MB/sec  299.28 MB/sec  192.675 MB/sec
> blade2          6.97931 MB/sec 9.42293 MB/sec 10.2482 MB/sec 12.407 MB/sec
> 
> Any help/ideas would be greatly appreciated. I have run through all the
> Insight diagnostics tools and it fails to find anything wrong with the slow
> server.
> 
> Cheers,
> Nathan 
> 
> _______________________________________________
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