Hi, Abel Gordon:
The CPU info of host is as follows:
Physical CPU: 2
Core Per Phy CPU: 6
HT: enabled
According to your advice, I have finished another benchmark which
ensures vcpus (32) is more than the cpu cores of host (24). The Results showed
that the dataplane enabled did have obvious advantage over non-dataplane under
Random write mode too.
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
d). Main Testing VM: os: win2003 server/raw, disk1:
raw/non-dataplane/10G/NTFS, disk2: raw/dataplane/10G/NTFS, vcpu: 8 (the limit
of win203 server )
./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -smp 8 -name win2003 -M
pc-0.15 -m 1024 -boot c -device
virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -monitor stdio -drive
file=/home/win2003.img,if=none,format=raw,cache=none,id=drive0 -chardev
spicevmc,id=charchannel2,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel2,id=channel2,name=com.redhat.spice.0
-chardev pty,id=charchannel3 -device
virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel3,id=channel3,name=arbitrary.virtio.serial.port.name
-usb -device usb-tablet,id=input0 -spice
port=3007,addr=186.100.8.121,disable-ticketing -vga qxl -global
qxl.vram_size=67108864 -device AC97,id=sound0,bus=pci.0,addr=0x4 -device
virtio-blk-pci,drive=drive0,bus=pci.0,addr=0x6,bootindex=1 -drive
id=drive1,if=none,cache=none,format=raw,file=/home/data.img -device
virtio-blk-pci,drive=drive1,bus=pci.0,addr=0x7 -drive
id=drive2,if=none,cache=none,format=raw,file=/home/data2.img,aio=native -device
virtio-blk-pci,drive=drive2,bus=pci.0,addr=0x8,scsi=off,x-data-plane=on,config-wce=off
e). Other 3 VMs: os: win2003 server/raw, disk:
raw/non-dataplane/10G/NTFS, vcpu: 8
./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -smp 8 -name win2006 -M
pc-0.15 -m 1024 -boot c -device
virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -monitor stdio -drive
file=/home/win2006.img,if=none,format=raw,cache=none,id=drive0 -chardev
spicevmc,id=charchannel2,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel2,id=channel2,name=com.redhat.spice.0
-chardev pty,id=charchannel3 -device
virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel3,id=channel3,name=arbitrary.virtio.serial.port.name
-usb -device usb-tablet,id=input0 -spice
port=3010,addr=186.100.8.121,disable-ticketing -vga qxl -global
qxl.vram_size=67108864 -device AC97,id=sound0,bus=pci.0,addr=0x4 -device
virtio-blk-pci,drive=drive0,bus=pci.0,addr=0x6,bootindex=1 -drive
id=drive1,if=none,cache=none,format=raw,file=/home/data_2006.img -device
virtio-blk-pci,drive=drive1,bus=pci.0,addr=0x7
2. Testing Tool And Testing Params:
a). Only IOMeter App Running in all the 4 VMs, and no other IO in Host
(Dom0)
b). 100% Random, 0% Read, 16K data size, 50 outstanding IO
c). Main Testing VM: testing of two disks separately, not
simultaneously, both for 15 minutes
e). Other 3 VMs: make IO pressure continuously
3. Testing Results:
IOPS_dataplane IOPS_non_dataplane MBPS_dataplane
MBPS_non_dataplane
201.4612 74.0764
3.147832 1.157444
> -----邮件原件-----
> 发件人: Abel Gordon [mailto:ab...@il.ibm.com]
> 发送时间: 2013年4月7日 19:42
> 收件人: Zhangleiqiang
> 抄送: Luohao (brian); Haofeng; qemu-devel@nongnu.org; Stefan Hajnoczi;
> Stefan Hajnoczi
> 主题: Re: [Qemu-devel] 答复: 答复: question about performance of dataplane
>
>
>
> qemu-devel-bounces+abelg=il.ibm....@nongnu.org wrote on 07/04/2013
> 02:31:20
> PM:
>
> > From: Zhangleiqiang <zhangleiqi...@huawei.com>
> > To: Stefan Hajnoczi <stefa...@redhat.com>,
> > Cc: Zhangleiqiang <zhangleiqi...@huawei.com>, Stefan Hajnoczi
> > <stefa...@gmail.com>, "Luohao \(brian\)" <brian.luo...@huawei.com>,
> > "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Haofeng
> <haof...@huawei.com>
> > Date: 07/04/2013 02:31 PM
> > Subject: [Qemu-devel] 答复: 答复: question about performance of
> dataplane
> > Sent by: qemu-devel-bounces+abelg=il.ibm....@nongnu.org
> >
> > Hi, Stefan:
> >
> > Follow your advice, I have finished the benchmarks with multiple
> > vcpu (smp) and parallel I/O workloads.
> > The results still show that the performance of disk with
> > dataplane enabled did not have advantage over non-dataplane under
> > Random write mode. But under the Sequence write mode, the former has
> > obvious advantage.
>
> Hi, Leiqzhang
>
> Interesting numbers. How many cores the host has ? was HT enabled ?
> Did you try to see what happens when you run more than 1 guest and when
> you create at least 1 VCPU per core in the host ?
