Re: [Xen-devel] Re: [ANNOUNCE] virtbench now has xen support

[Jan Michael <Jan.Michael@xxxxxxx>]

Hello Everyone,

I got my hands on a HP blade with 64-bit Intel XEON processors. I  
could successfully start the benchmark but after a while client 1  
closed the connection. Please see the full log below.
Could you please help me to find the error? Is there a some kind of  
debugging mode I could use to get more details from both, client and  
server side?
<virtbench execution>
[root@somemachine virtbench-cern]# ./virtbench xen
Bringing up machines11188 blocks
58.7%
11188 blocks
58.7%
11188 blocks
58.7%
11188 blocks
58.7%
....
Time for one context switch via pipe: 7747 (5070 - 8202)
Time for one Copy-on-Write fault: 4266 (4242 - 5865)
Time to exec client once: 331171 (329757 - 332406)
Time for one fork/exit/wait: 196031 (195781 - 196812)
Time to send 4 MB from host: 37688750 (27595500 - 47665250)
Time for one syscall via libc: 428 (417 - 652)
Time to walk linear 64 MB: 2130375 (2123000 - 2168750)
Time to walk random 64 MB: 2135000 (2130250 - 2140625)
virtbench: client 1 closed connection
sh: line 1: Using: command not found
sh: line 2: Started: command not found
virtbench: 'xen/stop_machine virtbench_3
Using config file "/tmp/virtbench-xen_3.cfg".
Started domain virtbench_3
' failed
sh: line 1: Using: command not found
sh: line 2: Started: command not found
virtbench: 'xen/stop_machine virtbench_2
Using config file "/tmp/virtbench-xen_2.cfg".
Started domain virtbench_2
' failed
Error: Domain 'virtbench_1' does not exist.
Error: 'xm destroy' requires 1 arguments.

sh: line 1: Using: command not found
sh: line 2: Started: command not found
virtbench: 'xen/stop_machine virtbench_1
Using config file "/tmp/virtbench-xen_1.cfg".
Started domain virtbench_1
' failed
sh: line 1: Using: command not found
sh: line 2: Started: command not found
virtbench: 'xen/stop_machine virtbench_0
Using config file "/tmp/virtbench-xen_0.cfg".
Started domain virtbench_0
' failed
</virtbench execution>

Thank you very much,

        Jan Michael


On 23.05.2007, at 20:05, Jan Michael wrote:
> Hello,
>
> as I found out it is a little bit tricky to use one's initrd.  
> Because Virtbench is overriding the init command in the domU  
> configuration file with rdinit and therefore it is not possible to  
> load modules:
> <virtbench-xen.cfg.in>
> extra       = "rdinit=/virtclient @VIRTBENCH_ID@ @SERVERIP@  
> @SERVERPORT@ /dev/xvda1 202 1 eth0 %s" % string.replace('@IP@',  
> '.', '/')
> </virtbench-xen.cfg.in>
>
> The template file virtbench-xen.cfg.in is used to create an  
> individual xen configuration file for each user domain.
> Despite this I tried to get the virtclient working with my own  
> initrd. I was able to successfully load the xen network and block  
> device driver. At the end of the init script I could start  
> virtclient from the ramdisk.
> So I modified the start_machine script in that way that it will  
> manipulate the init start script of the ramdisk and after that it  
> creates one initrd for each domU. The domU configuration uses now a  
> prepared ramdisk rather than this one from virtbench.
> The benchmark passed with the following outcome:
>
> Time for one context switch via pipe: 8734 (8640 - 9575)
> Time for one Copy-on-Write fault: 5898 (5814 - 8963)
> Time to exec client once: 573046 (565921 - 615390)
> Time for one fork/exit/wait: 347687 (345750 - 362250)
> Time to send 4 MB from host: 55785000 (27069625 - 315191500)
> Time for one int-0x80 syscall: 370 (370 - 403)
> Time for one syscall via libc: 376 (376 - 377)
> Time to walk linear 64 MB: 1790875 (1711750 - 3332875)
> Time to walk random 64 MB: 2254500 (2246000 - 2266250)
> Time for one outb PIO operation: 721 (717 - 733)
> DISABLED pte-update: glibc version is too old
> Time to read from disk (256 kB): 18810406 (14266718 - 24088906)
> Time for one disk read: 56343 (38593 - 201718)
> DISABLED vmcall: not a VT guest
> DISABLED vmmcall: not an SVM guest
> Time to send 4 MB between guests: 94326750 (79872250 - 729306500)
> Time for inter-guest pingpong: 130316 (119722 - 186511)
> Time to sendfile 4 MB between guests: 134768000 (86528000 - 417646000)
> Time to receive 1000 1k UDPs between guests: 26010000 (23384000 -  
> 66784000)
> Last question for today: What is the unit of these time values?
>
> Thanks,
>
>         Jan
>
>         
> On 22.05.2007, at 11:33, Jeremy Fitzhardinge wrote:
> > Jan Michael wrote:
> > > I can say that we are using a kernel builf from the attached kernel
> > > config and a special initrd image for our domUs.
> > > The initrd image contains the modules xenblk.ko and xennet.ko. So
> > > netfront and blkfront are not compiled into the kernel.
> > Modular is OK if they're in the initrd you're using.
> >
> > > Our linux gurus made the kernel and the initrd image. I think I have
> > > to integrate those modules into the initrd image you are using and
> > > have to load them. But at this point I have no knowledge how to do
> > > this...
> > It's distro-dependent, but mkinitrd works for RH-type systems.
> > Something like "mkinitrd --with=xenblk --with=xennet -v my-initrd.img
> > <kernel version>".
> >
> >     J
>
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

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