In Windows I have no problem at all. So, there must be something wrong with the Linux kernel
2012/4/2 Ming Lei <500...@bugs.launchpad.net> > On Sun, Apr 1, 2012 at 1:15 PM, adri58 <500...@bugs.launchpad.net> wrote: > > https://bugs.launchpad.net/bugs/500069/+attachment/2980204/+files/1u.mon.out > > adri58, thanks for your post. > > >From your usbmon trace, I found that it may take about ~22ms averagely > to complete writing 120KB[1] into your usb mass storage, so the max write > performance is about 5.3MB/sec, for example: > > /*send WRITE cmd from host to usb mass storage device*/ > ffff880037674d40 905709519 S Bo:2:007:2 -115 31 = 55534243 9f080000 > 00e00100 00000a2a 00000457 c60000f0 00000000 000000 > ffff880037674d40 905709611 C Bo:2:007:2 0 31 > > > /*write 120KB data to usb mass storage device*/ > ffff8801139ac080 905709619 S Bo:2:007:2 -115 122880 = 831683e5 > c00e55d7 83e9c00e 95c1f2bf fb0300c6 81908c93 c98144a9 5980441a > ffff8801139ac080 905731863 C Bo:2:007:2 0 122880 > > > /*read the status of writing operation*/ > ffff880037674d40 905731871 S Bi:2:007:1 -115 13 < > ffff880037674d40 905733112 C Bi:2:007:1 0 13 = 55534253 9f080000 00000000 > 00 > > The above 3 steps are an intact procedures to write 120KB into usb > mass storage device. > > Also looks no any error information is found in your trace, so your problem > should be that the usb mass storage is slow device, especially wrt. writing > performance. > > I suggest you to do some tests on windows to see if you can get same > performance with ubuntu. > > [1], 120KB is the max transfer unit per scsi command, also it is the most > frequent transfer unit in linux usb mass storage read/write. > > Thanks > -- > Ming Lei > > -- > You received this bug notification because you are subscribed to a > duplicate bug report (477843). > https://bugs.launchpad.net/bugs/500069 > > Title: > USB file transfer causes system freezes; ops take hours instead of > minutes > > Status in The Linux Kernel: > Confirmed > Status in “linux” package in Ubuntu: > Triaged > Status in “linux” package in Fedora: > Unknown > > Bug description: > USB Drive is a MP3 Player 2GB > > sbec@Diamant:~$ lsusb > Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 003 Device 002: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse > Receiver > Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 001 Device 004: ID 0402:5661 ALi Corp. > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > sbec@Diamant:~$ > > Linux Diamant 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:54:29 UTC > 2009 i686 GNU/Linux > Ubuntu 2.6.31-15.50-generic > > to test, i issued dd command: > dd if=/dev/zero of=/media/usb-disk/test-file bs=32 > > while dd is running i run dstat.... this is in the log file attached. > > other logs are also in the tar.gz file... > > there is a huge USB performance Bug report #1972262. this Report is > something simular > > To manage notifications about this bug go to: > https://bugs.launchpad.net/linux/+bug/500069/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/500069 Title: USB file transfer causes system freezes; ops take hours instead of minutes To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/500069/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
