Re: [Qemu-devel] QEMU throughput is down with SMP

2010-10-01 Thread Stefan Hajnoczi
On Fri, Oct 1, 2010 at 4:04 PM, Venkateswararao Jujjuri (JV) wrote: > On 10/1/2010 6:38 AM, Ryan Harper wrote: >> >> * Stefan Hajnoczi  [2010-10-01 03:48]: >>> >>> On Thu, Sep 30, 2010 at 8:19 PM, Venkateswararao Jujjuri (JV) >>>  wrote: On 9/30/2010 2:13 AM, Stefan Hajnoczi wrote:

Re: [Qemu-devel] QEMU throughput is down with SMP

2010-10-01 Thread Venkateswararao Jujjuri (JV)
On 10/1/2010 6:38 AM, Ryan Harper wrote: * Stefan Hajnoczi [2010-10-01 03:48]: On Thu, Sep 30, 2010 at 8:19 PM, Venkateswararao Jujjuri (JV) wrote: On 9/30/2010 2:13 AM, Stefan Hajnoczi wrote: On Thu, Sep 30, 2010 at 1:50 AM, Venkateswararao Jujjuri (JV) wrote: Code: Mainline QEMU (g

Re: [Qemu-devel] QEMU throughput is down with SMP

2010-10-01 Thread Ryan Harper
* Stefan Hajnoczi [2010-10-01 03:48]: > On Thu, Sep 30, 2010 at 8:19 PM, Venkateswararao Jujjuri (JV) > wrote: > > On 9/30/2010 2:13 AM, Stefan Hajnoczi wrote: > >> > >> On Thu, Sep 30, 2010 at 1:50 AM, Venkateswararao Jujjuri (JV) > >>  wrote: > >>> > >>> Code: Mainline QEMU (git://git.qemu.org

Re: [Qemu-devel] QEMU throughput is down with SMP

2010-10-01 Thread Stefan Hajnoczi
On Thu, Sep 30, 2010 at 8:19 PM, Venkateswararao Jujjuri (JV) wrote: > On 9/30/2010 2:13 AM, Stefan Hajnoczi wrote: >> >> On Thu, Sep 30, 2010 at 1:50 AM, Venkateswararao Jujjuri (JV) >>  wrote: >>> >>> Code: Mainline QEMU (git://git.qemu.org/qemu.git) >>> Machine: LS21 blade. >>> Disk: Local dis

Re: [Qemu-devel] QEMU throughput is down with SMP

2010-09-30 Thread Venkateswararao Jujjuri (JV)
On 9/30/2010 2:13 AM, Stefan Hajnoczi wrote: On Thu, Sep 30, 2010 at 1:50 AM, Venkateswararao Jujjuri (JV) wrote: Code: Mainline QEMU (git://git.qemu.org/qemu.git) Machine: LS21 blade. Disk: Local disk through VirtIO. Did not select any cache option. Defaulting to writethrough. Command tested

Re: [Qemu-devel] QEMU throughput is down with SMP

2010-09-30 Thread Stefan Hajnoczi
On Thu, Sep 30, 2010 at 1:50 AM, Venkateswararao Jujjuri (JV) wrote: > Code: Mainline QEMU (git://git.qemu.org/qemu.git) > Machine: LS21 blade. > Disk: Local disk through VirtIO. > Did not select any cache option. Defaulting to writethrough. > > Command tested: > 3 parallel instances of : dd if=/d

[Qemu-devel] QEMU throughput is down with SMP

2010-09-29 Thread Venkateswararao Jujjuri (JV)
Code: Mainline QEMU (git://git.qemu.org/qemu.git) Machine: LS21 blade. Disk: Local disk through VirtIO. Did not select any cache option. Defaulting to writethrough. Command tested: 3 parallel instances of : dd if=/dev/zero of=/pmnt/my_pw bs=4k count=10 QEMU with smp=1 19.3 MB/s + 19.2 MB/s