Abysmal performance for USB with Solaris 10 x86
2007-12-25 6:55:00
1st March 2007, kernel patch 118855-36 - on a new Dell Optiplex
745 PC. I'm having problems with performance using an 'ASTONE'
2GB USB memory stick.
The memory stick boasts '80x' speed on its cover, but under Solaris,
doing a 'dd' of /dev/zero into a file on a filesystem mounted on the
stick, I get only 450 kilobytes/sec. Running the Slackware 11 distribution
of Linux on the machine I get 2MB/sec; with Ubuntu I get better than
3.5MB/sec.
When I plug in the memory stick under Solaris 10 I see these messages
in /var/adm/messages:
Mar 7 10:52:11 mars usba: [ID 912658 kern.info] USB 2.0 device
(usb13fe,1a23) operating at hi speed (USB 2.x) on USB 2.0 root hub:
storage at 2, scsa2usb0 at bus address 2
Mar 7 10:52:11 mars usba: [ID 349649 kern.info] ASTONE 6E69040010A7
Mar 7 10:52:11 mars genunix: [ID 936769 kern.info] scsa2usb0 is
/pci at 0,0/pci1028,1da at 1a,7/storage at 2
Mar 7 10:52:11 mars genunix: [ID 408114 kern.info]
/pci at 0,0/pci1028,1da at 1a,7/storage at 2 (scsa2usb0) online
Mar 7 10:52:12 mars scsi: [ID 193665 kern.info] sd1 at scsa2usb0:
target 0 lun 0
Mar 7 10:52:12 mars genunix: [ID 936769 kern.info] sd1 is
/pci at 0,0/pci1028,1da at 1a,7/storage at 2/disk at 0,0
Mar 7 10:52:13 mars genunix: [ID 408114 kern.info]
/pci at 0,0/pci1028,1da at 1a,7/storage at 2/disk at 0,0 (sd1) online
A 'cfgadm -lv' of the usb port on which the ASTONE appears is as
follows:
Ap_Id Receptacle Occupant Condition Information
When Type Busy Phys_Id
usb2/2 connected configured ok
Mfg: Product: ASTONE NConfigs: 1 Config: 0 <no cfg str
descr>
unavailable usb-storage n /devices/pci at 0,0/pci1028,1da at 1a,7:2
An excerpt from 'prtconf -D' has this:
pci, instance #0 (driver name: npe)
pci1028,1da
pci8086,2991, instance #0 (driver name: pcie_pci)
display, instance #0 (driver name: vgatext)
pci1028,403
pci1028,1da, instance #0 (driver name: uhci)
pci1028,1da, instance #1 (driver name: uhci)
pci1028,1da, instance #0 (driver name: ehci)
storage, instance #0 (driver name: scsa2usb)
disk, instance #1 (driver name: sd)
...
which seems to suggest that the USB device is running under the
high-speed ehci driver?
I don't know much/anything about the mechanics of USB with Solaris 10 so
I would appreciate any advice; are there parameters I can inspect or
fiddle? Does anyone have an ASTONE 2GB memory stick working on Solaris
10 x86?
Any help would be most gratefully received!
Thanks,
Alex
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