From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>, xen-api@lists.xensource.com
Subject: io performance regression between xen and XCP
Date: Tue, 01 Jun 2010 01:58:51 +0800 [thread overview]
Message-ID: <4C03F8DB.5010300@cn.fujitsu.com> (raw)
Hi guys,
We have done the io performance test between xen and XCP, both tested on a
separate disk, and found XCP's regression is very great:
XCP's parameters:
Ｄom0
====== Control[d44ecc85-5539-438d-9bbc-f596dec69617] info:
VCPU:
VCPUs-params (MRW): mask: 0,1
VCPUs-max ( RW): 8
VCPUs-at-startup ( RW): 8
VCPUs-number ( RO): 8
VCPUs-utilisation (MRO):
Mem:
memory-actual ( RO): 2146172928
memory-target ( RO): 2146172928
memory-overhead ( RO): 1048576
memory-static-max ( RW): 2146172928
memory-dynamic-max ( RW): 2146172928
memory-dynamic-min ( RW): 1887436800
memory-static-min ( RW): 307232768
Guest:
====== spv1[9a1a2bf2-41a7-ca00-8dc5-92c51b6ed992] info:
VCPU:
VCPUs-params (MRW): mask: 7
VCPUs-max ( RW): 1
VCPUs-at-startup ( RW): 1
VCPUs-number ( RO): 1
VCPUs-utilisation (MRO): 0: 0.000
Mem:
memory-actual ( RO): 1073741824
memory-target ( RO): 1073741824
memory-overhead ( RO): 1048576
memory-static-max ( RW): 1073741824
memory-dynamic-max ( RW): 1073741824
memory-dynamic-min ( RW): 1073741824
memory-static-min ( RW): 1073741824
Xen's parameters:
###### xm list ######
Name ID Mem VCPUs State Time(s)
Domain-0 0 2048 2 r----- 52.5
co5.4-32-2 1 1024 1 -b---- 33.0
###### xm vcpu-list ######
Name ID VCPU CPU State Time(s) CPU Affinity
Domain-0 0 0 0 r-- 42.2 0
Domain-0 0 1 1 -b- 10.4 1
co5.4-32-2 1 0 6 -b- 33.0 6
###### xm sched-credit ######
Name ID Weight Cap
Domain-0 0 256 0
co5.4-32-2 1 256 0
Test result:
- direct read/write test:
test command:
dd if=/dev/zero of=1.img oflag=direct bs=256k count=4096
dd if=1.img of=/dev/null iflag=direct bs=256k count=4096
Xen: write: 33.3 MB/s read: 206 MB/s
XCP: write: 18.5 MB/s read: 108 MB/s
- no direct read/write test:
test command:
dd if=/dev/zero of=1.img bs=256k count=4096
dd if=1.img of=/dev/null bs=256k count=4096
Xen: write: 319 MB/s read: 85.9 MB/s
XCP: write: 136 MB/s read: 63.8 MB/s
Now, we are very confused about this result :-(
Xiao
next reply other threads:[~2010-05-31 17:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-31 17:58 Xiao Guangrong [this message]
[not found] ` <4C03F8DB.5010300-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2010-05-31 20:05 ` [Xen-devel] io performance regression between xen and XCP Daniel Stodden
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