Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-09 Thread Stefan Hajnoczi
On Thu, Mar 8, 2012 at 11:56 PM, Ross Becker ross.bec...@gmail.com wrote: I just joined in order to chime in here- I'm seeing the exact same thing as Reeted;  I've got a machine with a storage subsystem capable of 400k IOPs, and when I punch the storage up to VMs, each VM seems to top out at

Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-08 Thread Ross Becker
I just joined in order to chime in here- I'm seeing the exact same thing as Reeted; I've got a machine with a storage subsystem capable of 400k IOPs, and when I punch the storage up to VMs, each VM seems to top out at around 15-20k IOPs. I've managed to get to 115k IOPs by creating 8 VMs,

Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-07 Thread Stefan Hajnoczi
On Tue, Mar 6, 2012 at 10:07 PM, Reeted ree...@shiftmail.org wrote: On 03/06/12 13:59, Stefan Hajnoczi wrote: On Mon, Mar 5, 2012 at 4:44 PM, Martin Mailandmar...@tuxadero.com  wrote: Am 05.03.2012 17:35, schrieb Stefan Hajnoczi: 1. Test on i7 Laptop with Cpu governor ondemand.  v0.14.1

Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-07 Thread Reeted
On 03/07/12 09:04, Stefan Hajnoczi wrote: On Tue, Mar 6, 2012 at 10:07 PM, Reetedree...@shiftmail.org wrote: On 03/06/12 13:59, Stefan Hajnoczi wrote: BTW, I'll take the opportunity to say that 15.8 or 20.3 k IOPS are very low figures compared to what I'd instinctively expect from a

Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-07 Thread Stefan Hajnoczi
On Wed, Mar 7, 2012 at 2:21 PM, Reeted ree...@shiftmail.org wrote: On 03/07/12 09:04, Stefan Hajnoczi wrote: On Tue, Mar 6, 2012 at 10:07 PM, Reetedree...@shiftmail.org  wrote: On 03/06/12 13:59, Stefan Hajnoczi wrote: BTW, I'll take the opportunity to say that 15.8 or 20.3 k IOPS are very

Re: [Qemu-devel] virtio-blk performance regression and qemu-kvm

2012-03-06 Thread Reeted
On 03/06/12 13:59, Stefan Hajnoczi wrote: On Mon, Mar 5, 2012 at 4:44 PM, Martin Mailandmar...@tuxadero.com wrote: Am 05.03.2012 17:35, schrieb Stefan Hajnoczi: 1. Test on i7 Laptop with Cpu governor ondemand. v0.14.1 bw=63492KB/s iops=15873 bw=63221KB/s iops=15805 v1.0