On Tue, Jun 19, 2012 at 5:24 AM, Asias He <asias@xxxxxxxxxx> wrote: > On 06/18/2012 06:58 PM, Stefan Hajnoczi wrote: >> >> As long as the latency is decreasing that's good. But It's worth >> keeping in mind that these percentages are probably wildly different >> on real storage devices and/or qemu-kvm. What we don't know here is >> whether this bottleneck matters in real environments - results with >> real storage and with qemu-kvm would be interesting. > > > Yes. Here is the performance data on a Fusion-IO SSD device. > > Fio test is performed in a 8 vcpu guest with Fusion-IO based guest using kvm > tool. > > Short version: > With bio-based IO path, sequential read/write, random read/write > IOPS boost : 11%, 11%, 13%, 10% > Latency improvement: 10%, 10%, 12%, 10% Nice, I'm glad the improvement shows on real hardware. Stefan _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
