On Fri, Apr 16, 2010 at 04:49:42PM +0800, yingbin wang wrote:
> the problem is solved.
>
> we closed most of the debug config options. a miracle happened. the
> performance returned to the level before.
> we compared the .config of 2.6.18.8 with 2.6.31.13. the differences
> are the debug options.
> I think the default .config in 2.6.31.13 should close the debug
> options or provide a way to turn off.
>
Could you please post the exact .config options you turned off to fix the
problem?
I can add that info to the wiki page.
Also can you please post the performance numbers with 2.6.18.8 and
pvops dom0 with and without debug? This would be interesting to know.
Thanks!
-- Pasi
> thanks all
>
> Cheers,
> wyb
>
> 2010/4/16 yingbin wang <yingbin.wangyb@xxxxxxxxx>:
> > Hi:
> > I report a Bug !!! We have just upgraded to
> > xen4.0+kernel2.6.31.13 recently. however , fond that the network
> > performance drop heavily in dom0 (nearly Reduced by 2/3 vs
> > xen3.4.2+kernel2.6.18.8 ) .
> >
> > our env :
> > hardware :
> > Intel(R) Xeon(R) CPU E5520 @ 2.27GHz
> > 01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II
> > BCM5709 Gigabit Ethernet (rev 20)
> > 01:00.1 Ethernet controller: Broadcom Corporation NetXtreme II
> > BCM5709 Gigabit Ethernet (rev 20)
> > compile env and filesystem :
> > Redhat AS 5.4
> >
> > xm info :
> > -----------------------------------------------------------------
> > host : r02k08015
> > release : 2.6.31.13xen
> > version : #1 SMP Tue Apr 13 20:38:51 CST 2010
> > machine : x86_64
> > nr_cpus : 16
> > nr_nodes : 2
> > cores_per_socket : 4
> > threads_per_core : 2
> > cpu_mhz : 2266
> > hw_caps :
> > bfebfbff:28100800:00000000:00001b40:009ce3bd:00000000:00000001:00000000
> > virt_caps : hvm
> > total_memory : 24539
> > free_memory : 15596
> > node_to_cpu : node0:0,2,4,6,8,10,12,14
> > node1:1,3,5,7,9,11,13,15
> > node_to_memory : node0:3589
> > node1:12007
> > node_to_dma32_mem : node0:2584
> > node1:0
> > max_node_id : 1
> > xen_major : 4
> > xen_minor : 0
> > xen_extra : .0
> > xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
> > hvm-3.0-x86_32p hvm-3.0-x86_64
> > xen_scheduler : credit
> > xen_pagesize : 4096
> > platform_params : virt_start=0xffff800000000000
> > xen_changeset : unavailable
> > xen_commandline : dom0_mem=10240M
> > cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)
> > cc_compile_by : root
> > cc_compile_domain :
> > cc_compile_date : Tue Apr 13 23:04:16 CST 2010
> > xend_config_format : 4
> > ---------------------------------------------------------------------------
> >
> >
> > test tool: iperf-2.0.4
> > command:
> > root@xxxxxxxxxxx : iperf -s
> > root@xxxxxxxxxxx : iperf -c 10.250.6.25 -i 1 -t 100
> >
> > network performance:
> >
> > xen4.0+kernel2.6.31.13:
> > [ ID] Interval Transfer Bandwidth
> > [ 4] 0.0- 9.5 sec 249 MBytes 219 Mbits/sec
> >
> > xen3.4.2+kernel2.6.18.8:
> > [ ID] Interval Transfer Bandwidth
> > [ 4] 0.0-15.0 sec 1.64 GBytes 941 Mbits/sec
> >
> > BTW ,1 the disk IO performance also reduce from 90MB/s to 60MB/s.
> > 2 the attachment is the dom0 kernel compile config.
> >
> > Cheers,
> > wyb
> >
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home