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New: Very Slow I/O performance on SAS1064

Bug 66611 [email protected] 1 participant 4 messages Dec 5, 2013 – Nov 9, 2016 SCSI

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#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=66611

            Bug ID: 66611
           Summary: Very Slow I/O performance on SAS1064
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 3.12.2
          Hardware: Sparc64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Hi

I have a sunfire v245 with 4 Sata disks (TOSHIBA MQ01ABB2 0U)

my controller:
0000:0d:01.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1064 PCI-X Fusion-MPT SAS (rev 02)

[   86.909571] Fusion MPT SAS Host driver 3.04.20

Moduls load:

mptsas                 33574  2
scsi_transport_sas     21704  2 mptsas
mptscsih               17605  1 mptsas
mptbase                53658  3 mptctl,mptsas,mptscsih
scsi_mod              171548  10

sg,scsi_transport_sas,libata,mptctl,mptsas,sd_mod,sr_mod,mptscsih

The kernel is self compiled and i provide the config if needed Linux hostname 3.12.2 #4 Wed Dec 4 13:45:28 CET 2013 sparc64 GNU/Linux On Debian 7.2

Test with dd:

# dd if=/dev/zero of=test.dd bs=8k count=1000
1000+0 records in
1000+0 records out
8192000 bytes (8.2 MB) copied, 85.015 s, 96.4 kB/s
# dstat -cdr -D sdb
----total-cpu-usage---- --dsk/sdb-- ---io/sdb--
usr sys idl wai hiq siq| read  writ| read  writ
 11   1  36  52   0   0|  93k 5949B|0.58  0.96
  0   0   0 100   0   0|   0    25k|   0  3.00
  0   0   0 100   0   0|   0   225k|   0  37.0
  0   0   0 100   0   0|   0   528k|   0  68.0
  0   0   0 100   0   0|   0   224k|   0  29.0
  0   0   0 100   0   0|   0   130k|   0  16.0
  0   0   0 100   0   0|   0     0 |   0     0
  0   0   0 100   0   0|   0  8192B|   0  1.00
  0   0   0 100   0   0|   0    25k|   0  4.00
  0   0   0 100   0   0|   0    85k|   0  16.0
  0   0   0 100   0   0|   0    87k|   0  11.0
  0   0   0 100   0   0|   0     0 |   0     0
  0   0   0 100   0   0|   0  8192B|   0  1.00
  0   0   0 100   0   0|   0    25k|   0  4.00
  0   0   0 100   0   0|   0    26k|   0  5.00
....

Thanks

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#2 lore raw

[Bug 66611] Very Slow I/O performance on SAS1064

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=66611

--- Comment #2 from Markus <[email protected]> ---

[76030.662354] sd 2:0:0:0: [sda] CDB:
[76030.708275] Synchronize Cache(10): 35 00 00 00 00 00 00 00 00 00
[76032.423998] mptscsih: ioc0: task abort: SUCCESS (rv=2002)
(sc=fffff8137f45fda0)
[76132.695517] mptscsih: ioc0: attempting task abort! (sc=fffff8137f4049a0)
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#3 lore raw

[Bug 66611] Very Slow I/O performance on SAS1064

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=66611

Szőgyényi Gábor <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]

--- Comment #3 from Szőgyényi Gábor <[email protected]> --- Please try this bug with latest kernel image.

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