Hi Ming-Lei - What I like about your explanation is it allows cache status to be the communication path for network traffic to impact the issue, ie network activity finally spills the cache that does update the qtd descriptor and then we get less deadtime. That sounds very good to me.
I'm using this tree http://git.linaro.org/gitweb?p=people/andygreen/kernel- tilt.git;a=patch;h=7021a2ea35d0b0f96e6c5a753312c26466919efd Your patch http://git.linaro.org/gitweb?p=people/andygreen/kernel- tilt.git;a=shortlog;h=refs/heads/tilt-linux-linaro-3.0 I realized I do have a USB HDD here. I will try that as well in case the USB flash drive is the limiting factor. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709245 Title: ARM SMP scheduler performance bug To manage notifications about this bug go to: https://bugs.launchpad.net/linaro-ubuntu/+bug/709245/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs