Ah! /dev/urandom is the limiting factor ^^ USB HDD is also stuck at 1.9Mbps with the same test. Same test with of=/dev/null is only getting 2.0Mbps.
With the USB HDD and if=/dev/zero instead, and 10x count root@linaro:~# dd if=/dev/zero of=/media/dump bs=40960 count=10000 10000+0 records in 10000+0 records out 409600000 bytes (410 MB) copied, 16.5168 s, 24.8 MB/s root@linaro:~# dd if=/dev/zero of=/media/dump bs=40960 count=10000 10000+0 records in 10000+0 records out 409600000 bytes (410 MB) copied, 18.4294 s, 22.2 MB/s With the patch out, this takes an insanely long time. Against the USB stick, it rises to 7.1MBps with the patch in vs 3.5MBps with it out. So nice job! -- 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
