Hi all,
I'm getting slow speed with USB flash disk mentioned below. It's on
new laptop, but same issue was on previous Dell workstation. It's
running mostly around 6MB/s or less regarding info from systat. In
this case xfe (see top -CST -s 10 output) was used, but it's same
either in console or X. On Linux/Windows it's running around 20MB/s
during copy/write of same files. Unplug is possible to do immediately
so probably not so much cache in use on those systems (didn't not
check deeply in fact).
Is there something what can I try/check/modify to see better speed?
Thanks a lot
$ grep cache /etc/sysctl.conf
kern.bufcachepercent=70
$
umass0 at uhub5 port 2 configuration 1 interface 0 Kingston DT 100
G2 rev 2.00/1.00 addr 4
umass0: using SCSI over Bulk-Only
scsibus3 at umass0: 2 targets, initiator 0
sd1 at scsibus3 targ 1 lun 0: Kingston, DT 100 G2, PMAP SCSI0
0/direct removable serial.09511653BB31070B0152
sd1: 7534MB, 512 bytes/sector, 15430464 sectors
$ usbdevs -v
Controller /dev/usb0:
addr 1: high speed, self powered, config 1, EHCI root hub(0x),
Intel(0x8086), rev 1.00
port 1 addr 2: high speed, self powered, config 1, product
0x0024(0x0024), Intel(0x8087), rev 0.00
port 1 addr 3: high speed, self powered, config 1, product
0x2513(0x2513), Dell(0x413c), rev a0.05
port 1 addr 4: low speed, power 98 mA, config 1, DELL USB Laser
Mouse(0xc063), DELL(0x046d), rev 57.00
port 2 powered
port 3 addr 5: full speed, power 100 mA, config 1, Dell Smart Card
Reader Keyboard(0x2101), Dell(0x413c), rev 1.00
port 2 addr 6: high speed, self powered, config 1, product
0x2513(0x2513), Dell(0x413c), rev a0.05
port 1 powered
port 2 addr 7: full speed, power 100 mA, config 1, GN 2000 USB
OC(0x2004), JABRA(0x0b0e), rev 2.00
port 3 powered
port 3 powered
port 4 powered
port 5 addr 8: high speed, power 500 mA, config 1,
Laptop_Integrated_Webcam_HD(0x2980), 001E9073559E-B416-15151F(0x1bcf),
rev c.17
port 6 powered
port 2 powered
port 3 powered
Controller /dev/usb1:
addr 1: high speed, self powered, config 1, EHCI root hub(0x),
Intel(0x8086), rev 1.00
port 1 addr 2: high speed, self powered, config 1, product
0x0024(0x0024), Intel(0x8087), rev 0.00
port 1 powered
port 2 addr 4: high speed, power 200 mA, config 1, DT 100
G2(0x1653), Kingston(0x0951), rev 1.00, iSerialNumber S/N
port 3 powered
port 4 powered
port 5 powered
port 6 powered
port 7 powered
port 8 addr 3: full speed, power 100 mA, unconfigured, 5880(0x5800),
Broadcom Corp(0x0a5c), rev 1.01, iSerialNumber S/N
port 2 powered
port 3 powered
$
$ usbstats
Controller /dev/usb0:
216 control
0 isochronous
0 bulk
67836 interrupt
Controller /dev/usb1:
138 control
0 isochronous
2060244 bulk
3 interrupt
$
$ sudo usbctl -f /dev/usb1 -a 4
DEVICE addr 4
DEVICE descriptor:
bLength=18 bDescriptorType=device(1) bcdUSB=2.00 bDeviceClass=0
bDeviceSubClass=0
bDeviceProtocol=0 bMaxPacketSize=64 idVendor=0x0951 idProduct=0x1653
bcdDevice=100
iManufacturer=1(Kingston) iProduct=2(DT 100 G2) iSerialNumber=3(S/N)
bNumConfigurations=1
CONFIGURATION descriptor 0:
bLength=9 bDescriptorType=config(2) wTotalLength=32 bNumInterface=1
bConfigurationValue=1 iConfiguration=0() bmAttributes=80 bMaxPower=200 mA
INTERFACE descriptor 0:
bLength=9 bDescriptorType=interface(4) bInterfaceNumber=0 bAlternateSetting=0
bNumEndpoints=2 bInterfaceClass=8 bInterfaceSubClass=6
bInterfaceProtocol=80 iInterface=0()
ENDPOINT descriptor:
bLength=7 bDescriptorType=endpoint(5) bEndpointAddress=1-in
bmAttributes=bulk wMaxPacketSize=512 bInterval=0
ENDPOINT descriptor:
bLength=7 bDescriptorType=endpoint(5) bEndpointAddress=2-out
bmAttributes=bulk wMaxPacketSize=512 bInterval=0
current configuration 1
--
$
2 usersLoad 2.44 2.22 1.79 Mon Aug 15 13:05:10 2011
memory totals (in KB)PAGING SWAPPING Interrupts
real virtual free in out in out 7677 total
Active 415856415856 2283104 ops401 clock
All 967704967704 5859920 pages 3086 ipi
acpi0
Proc:r d s wCsw Trp Sys Int Sof Flt forks 4 em0
114 647046 5309 4190 4123 83 fkppw 25 ehci0
fksvm azalia0
0.2%Int 4.6%Sys 0.4%Usr 0.0%Nic 94.8%Idle pwait3990 ehci1
||||||||||| relck 168 ahci0
== rlkok 3 ichiic0
noram pckbc0
Namei Sys-cacheProc-cacheNo-cache 5 ndcpy pckbc0
Calls hits%hits %miss % fltcp
188 188 100
