i.MX ProcessorsのトピックRe: USB performance test between i.mx6(device) to PC(Host)

USB performance test between i.mx6(device) to PC(Host)

gbiradar — Thu, 23 Jul 2015 08:50:57 GMT

Hello experts,

i need your help i'm trying to do some testing on usb , pc to device is connected by usb, from my pc i have to copy some dummy file to device and read it back.

note: device has no support for otg host.

waiting for expert advice.

Re: USB performance test between i.mx6(device) to PC(Host)

igorpadykov — Thu, 23 Jul 2015 12:26:11 GMT

Hi Ganesh

one can test it with dd command and using "g_mass_storage gadget"

please look at attached description sect.2.2 Test g_mass_storage module

(from http://repository.timesys.com/buildsources/i/imx-test/imx-test-3.14.28-1.0.0/ )

examples of dd usage:

USB Host Performance on i.MX6

Re: USB OTG Mass Storage Pefromance

Best regards

igor

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Re: USB performance test between i.mx6(device) to PC(Host)

gbiradar — Fri, 24 Jul 2015 06:35:43 GMT

Hi igor,

I have actually gone through your links, in i.mx6 board is running,using usb i connected to pc, my i.mx6 sd card has 2 partition, sd1 carries uboot, uimage, rootfs and sdb2 is simple config file, sd card is of 8gb divided in 6:2 ratio. when i.mx6 is connected to pc, in pc i can see sdb i.e sdb2 partition. lsusb -l gives storage device. my second partition is fat32, i have done some test.

in pc:

$ cd /media/partition2/

$ sudo dd if=/dev/zero of=tempfile bs=512 count=100 conv=fdatasync,notrunc

copied 105M in 12 sec with 8.1 MB/s

$df -h

i can see change here in partition usage

but when i go device terminal,

df -h gives no change in size to see change i have to reboot my device.

what am i doing is correct. if so what is the way to see run time change in sd card partition in device.

Thanks in advance for helping me.

Re: USB performance test between i.mx6(device) to PC(Host)

gbiradar — Fri, 24 Jul 2015 06:36:54 GMT

its 1M not 512. sorry for error.