On Sun, Apr 07, 2013 at 09:05:47AM -0500, Anthony Liguori wrote: > Zhangleiqiang <zhangleiqi...@huawei.com> writes: > > > Hi, Stefan： > > > > I have done some testing to compare the performance of dataplane and > > non-dataplane. But the result did not meet my expectations, the > > performance of disk with dataplane enabled did not have advantage over > > non-dataplane. > > > > The following contains the environment info and testing results. > > Does my testing method or testing environment have something wrong ? Could > > you give me some advice? I can provide more information if need. > > > > > > 1. Environment: > > a). Qemu 1.4 master branch > > b). kernel: 3.5.0-2.fc17.x86_64 > > c). virtual disks location: the same local SATA harddisk > > with ext4 fs > > I doubt you'll see any performance difference with a single SATA drive. > There's no real parallelism possible as you have exactly one spindle > available.
Sorry for the delay, catching up on emails after my Easter vacation. I agree with Anthony here. It seems your benchmark configuration is bottlenecked below the point where data plane makes a difference. Stefan
