Slow I/O performance on SAS1064

[Markus]

Hi

I have problem with SATA disks at my Sunfire v245 and its lsi controller they are very slow.

So I test it with dd and while dd in a nother terminal i see dstat results of sda:


Copy from ramdisk to sda.
=== Test ext4 ===
DD

root@outpost:/ramdisk# dd if=debian-7.4.0-sparc-netinst.iso of=/root/test.dd
353344+0 records in
353344+0 records out
180912128 bytes (181 MB) copied, 24.6384 s, 7.3 MB/s

Dstat:

----total-cpu-usage---- --dsk/sda-- ---io/sda--
usr sys idl wai hiq siq| read  writ| read  writ
  1   0 100   0   0   0|   0     0 |   0     0 
  0   0 100   0   0   0|   0     0 |   0     0 
  2   1  97   0   0   0|   0     0 |   0     0 
  1   5  94   0   0   0|   0     0 |   0     0 
  7  43  50   0   0   0|   0     0 |   0     0 
  7  43  50   0   0   0|   0     0 |   0     0 
 10  40  50   0   0   0|   0     0 |   0     0 
 12  45  41   3   0   0|   0     0 |   0     0 
  6  42  36  17   0   1|   0   512k|   0  1.00 
  0   0   0  99   0   0|   0  4096k|   0  8.00 
  0   2   0  98   0   0|   0  5120k|   0  10.0 
  0   1   0  99   0   0|   0  7680k|   0  15.0 
  1   0   0 100   0   0|   0  5632k|   0  11.0 
  0   0   0  99   0   0|   0  7168k|   0  14.0 
  1   1   0  99   0   0|   0  6656k|   0  13.0 
  0   0   0 100   0   0|   0  6144k|   0  12.0 
  1   0   0 100   0   0|   0  7680k|   0  15.0 
  0   1  22  78   0   0|   0  4608k|   0  9.00 
  0   0  50  50   0   0|   0  3072k|   0  6.00 
  1   0  50  50   0   1|   0  7168k|   0  14.0 
  1   1  50  49   0   0|4096B 5120k|1.00  10.0 
  0   0  50  50   0   0|   0  8704k|   0  17.0 
  0   0  50  49   0   0|   0  7680k|   0  15.0 
  0   1  50  50   0   0|   0  7168k|   0  14.0 
  1   0  49  49   0   0|   0  7168k|   0  14.0 
  1   0  50  50   0   0|   0  7680k|   0  15.0 
  0   0  50  50   0   0|   0  7168k|   0  14.0 
  0   0  50  50   0   0|   0  2560k|   0  5.00 
  0   1  30  69   0   0|   0  3624k|   0  8.00 
  1   0   0  99   0   0|   0  4100k|   0  9.00 
  0   0   0 100   0   0|   0  5632k|   0  11.0 
  0   0   0  99   0   0|   0  3584k|   0  7.00 
  1   0   0 100   0   0|   0  4608k|   0  9.00 
  0   0   0  99   0   1|   0  5120k|   0  10.0 
  1   0   4  96   0   0|   0  2560k|   0  6.00 
  0   0  50  50   0   0|   0  3072k|   0  6.00 
  0   0  49  50   0   0|   0  5120k|   0  10.0 
  1   0  50  50   0   0|   0  5120k|   0  10.0 
  0   0  50  50   0   0|   0  4096k|   0  8.00 
  1   0  50  50   0   0|   0  5120k|   0  10.0 
  0   0  50  50   0   0|   0  5120k|   0  10.0 
  0   1  57  42   0   0|   0  1125k|   0  17.0 
  0   0 100   0   0   0|   0     0 |   0     0 
  1   0 100   0   0   0|   0     0 |   0     0 
  1   0 100   0   0   0|   0     0 |   0     0 
  0   0 100   0   0   0|   0     0 |   0     0 
  0   0 100   0   0   0|   0     0 |   0     0

-------------------------------------------------------------------------------
Information:
Kernel 3.13.5 (stable release)
Debian7 (stable)
hdparm v9.39


Controller 
LSI SAS1064
	cat /proc/mpt/ioc0/info 
	ioc0:
	  ProductID = 0x2701 (LSISAS1064 A3)
	  FWVersion = 0x01080400
	  MsgVersion = 0x0105
	  FirstWhoInit = 0x00
	  EventState = 0x00
	  CurrentHostMfaHighAddr = 0x00000000
	  CurrentSenseBufferHighAddr = 0x00000000
	  MaxChainDepth = 0x60 frames
	  MinBlockSize = 0x20 bytes
	  RequestFrames @ 0xfffffc137f602800 (Dma @ 0x00000000c000a800)
	    {CurReqSz=128} x {CurReqDepth=511} = 65408 bytes ^= 0x10000
	    {MaxReqSz=128}   {MaxReqDepth=511}
	  Frames   @ 0xfffffc137f600000 (Dma @ 0x00000000c0008000)
	    {CurRepSz=80} x {CurRepDepth=128} = 10240 bytes ^= 0x2880
	    {MaxRepSz=0}   {MaxRepDepth=511}
	  MaxDevices = 63
	  MaxBuses = 1
	  PortNumber = 1 (of 1)

	cat /proc/mpt/version 
		mptlinux-3.04.20
		  Fusion MPT base driver
		  Fusion MPT SAS host driver
		  Fusion MPT ioctl driver

-------------------------------------------------------------------------------
Hdparm Information:
	hdparm -I /dev/sda
	
	/dev/sda:
	SG_IO: bad/missing sense data, sb[]:  70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
	
	ATA device, with non-removable media
	Standards:
	        Likely used: 1
	Configuration:
	        Logical         max     current
	        cylinders       0       0
	        heads           0       0
	        sectors/track   0       0
	        --
	        Logical/Physical Sector size:           512 bytes
	        device size with M = 1024*1024:           0 MBytes
	        device size with M = 1000*1000:           0 MBytes 
	        cache/buffer size  = unknown
	Capabilities:
	        IORDY not likely
	        Cannot perform double-word IO
	        R/W multiple sector transfer: not supported
	        DMA: not supported
			PIO: pio0  

-------------------------------------------------------------------------------
Moduls load:
lsmod | grep mpt
	mptctl                 27359  0 
	mptsas                 45861  5 
	mptscsih               25765  1 mptsas
	mptbase                75530  3 mptctl,mptsas,mptscsih
	scsi_transport_sas     21624  1 mptsas

-------------------------------------------------------------------------------
The hdparm result looks like there is somethink not right . There were no features supported but why ?


Greetings Markus

Attachment: signature.asc
Description: Digital signature