Hello Xiaohui,
On Tue, 2009-11-03 at 09:06 +0800, Xin, Xiaohui wrote:
> Hi, Michael,
> What's your deferring skb allocation patch mentioned here, may you
> elaborate it a little more detailed?
That's my patch. It was submitted a few month ago. Here is the link to
this RFC patch:
http://www.mail-a
009 3:47 AM
To: Shirley Ma
Cc: Sridhar Samudrala; Shirley Ma; David Stevens; kvm@vger.kernel.org;
s...@linux.vnet.ibm.com; mashi...@linux.vnet.ibm.com
Subject: Re: vhost-net patches
On Thu, Oct 29, 2009 at 12:11:33AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> I am able to get 63xxMb/s t
On Thu, Oct 29, 2009 at 12:11:33AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> I am able to get 63xxMb/s throughput with 10% less cpu utilization when
> I apply deferring skb patch on top of your most recent vhost patch. The
> userspace TCP_STREAM BW used to be 3xxxMb/s from upper stream git tre
On 10/29/2009 02:21 PM, Avi Kivity wrote:
On 10/28/2009 06:46 PM, Michael S. Tsirkin wrote:
On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote:
Hello Michael,
On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
Possibly GFP_ATOMIC allocations in vring_add_indirect are failing
On 10/28/2009 06:46 PM, Michael S. Tsirkin wrote:
On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote:
Hello Michael,
On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
Possibly GFP_ATOMIC allocations in vring_add_indirect are failing?
Is there a chance you are tight
Hello Michael,
I am able to get 63xxMb/s throughput with 10% less cpu utilization when
I apply deferring skb patch on top of your most recent vhost patch. The
userspace TCP_STREAM BW used to be 3xxxMb/s from upper stream git tree.
After applying your recent vhost patch, it goes up to 53xxMb/s. N
Hello Michael,
When I am testing deferring skb allocation patch, I found this problem.
Simply removing and reloading guest virtio_net module would cause guest
exit with errors. It is easy to reproduce it:
[r...@localhost ~]# rmmod virtio_net
[r...@localhost ~]# modprobe virtio_net
vhost_net_ini
Hello Arnd,
On Wed, 2009-10-28 at 18:46 +0100, Arnd Bergmann wrote:
> You can probably connect it like this:
>
> qemu - vhost_net - vnet0 == /dev/tun - qemu
>
> To connect two guests.
>
> I've also used a bidirectional pipe before, to connect two tap
> interfaces to each other. However, if you
Hello Miachel,
On Wed, 2009-10-28 at 18:53 +0200, Michael S. Tsirkin wrote:
> what exactly do you mean by transmission queue size?
> tx_queue_len?
> I think what should help with transmission queue full is
> actually sndbuf parameter for tap in qemu.
I didn't see my email out, I resend the respon
On Monday 26 October 2009, Shirley Ma wrote:
> On Sun, 2009-10-25 at 11:11 +0200, Michael S. Tsirkin wrote:
> > What is vnet0?
>
> That's a tap interface. I am binding raw socket to a tap interface and
> it doesn't work. Does it support?
Is the tap device connected to a bridge as you'd normally
On Wed, Oct 28, 2009 at 09:45:37AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> On Wed, 2009-10-28 at 17:39 +0200, Michael S. Tsirkin wrote:
> > Here's another hack to try. It will break raw sockets,
> > but just as a test:
>
> This patch looks better than previous one for guest to host TCP_STRE
On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
> > Possibly GFP_ATOMIC allocations in vring_add_indirect are failing?
> > Is there a chance you are tight on guest memory for some reason?
> > with vhost,
Hello Michael,
On Wed, 2009-10-28 at 17:39 +0200, Michael S. Tsirkin wrote:
> Here's another hack to try. It will break raw sockets,
> but just as a test:
This patch looks better than previous one for guest to host TCP_STREAM
performance. The transmission queue full still exists, but TCP_STREAM
r
On Tue, 2009-10-27 at 22:58 +0200, Michael S. Tsirkin wrote:
> How large is large here? I usually allocate 1G.
I used to have 512, for this run I allocated 1G.
> > I do see performance improves to 3xxxMb/s, and occasionally
> > reaches 40xxMb/s.
>
> This is same as userspace, isn't it?
A little
On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
> > Possibly GFP_ATOMIC allocations in vring_add_indirect are failing?
> > Is there a chance you are tight on guest memory for some reason?
> > with vhost,
On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
> > Possibly GFP_ATOMIC allocations in vring_add_indirect are failing?
> > Is there a chance you are tight on guest memory for some reason?
> > with vhost,
Hello Michael,
On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote:
> Possibly GFP_ATOMIC allocations in vring_add_indirect are failing?
> Is there a chance you are tight on guest memory for some reason?
> with vhost, virtio does currently consume a bit more memory than
> with userspace ba
On Tue, Oct 27, 2009 at 07:46:59AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> On Tue, 2009-10-27 at 08:43 +0200, Michael S. Tsirkin wrote:
> > At some point my guest had a runaway nash-hotplug process
> > consuming 100% CPU. Could you please verify this
> > does not happen to you?
>
> What I h
On Tue, 2009-10-27 at 08:38 +0200, Michael S. Tsirkin wrote:
> Yes but you need to make host send packets out to tap as well,
> somehow. One way to do this is to assign IP address in
> a separate subnet to tap in host and to eth device in guest.
Thanks for the hint, I will make a try.
Shirley
--
Hello Michael,
On Tue, 2009-10-27 at 08:43 +0200, Michael S. Tsirkin wrote:
> At some point my guest had a runaway nash-hotplug process
> consuming 100% CPU. Could you please verify this
> does not happen to you?
What I have found that the start_xmit stopped and restarted too often.
There is no v
On Mon, Oct 26, 2009 at 02:34:49PM -0700, Shirley Ma wrote:
> Hello Miachel,
>
> On Mon, 2009-10-26 at 22:05 +0200, Michael S. Tsirkin wrote:
> > Shirley, could you please test the following patch?
>
> With this patch, the performance has gained from 1xxx to 2xxx Mb/s,
> still has some performanc
On Mon, Oct 26, 2009 at 02:37:47PM -0700, Shirley Ma wrote:
> On Sun, 2009-10-25 at 11:11 +0200, Michael S. Tsirkin wrote:
> > What is vnet0?
>
> That's a tap interface. I am binding raw socket to a tap interface and
> it doesn't work. Does it support?
Yes but you need to make host send packets o
On Sun, 2009-10-25 at 11:11 +0200, Michael S. Tsirkin wrote:
> What is vnet0?
That's a tap interface. I am binding raw socket to a tap interface and
it doesn't work. Does it support?
Thanks
Shirley
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Pulled your git tree, didn't see the panic.
Thanks
Shirley
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Hello Miachel,
On Mon, 2009-10-26 at 22:05 +0200, Michael S. Tsirkin wrote:
> Shirley, could you please test the following patch?
With this patch, the performance has gained from 1xxx to 2xxx Mb/s,
still has some performance gap compared to without vhost. It was
3xxxMb/s before from guest to host
On Fri, Oct 23, 2009 at 09:23:40AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> Some initial vhost test netperf results on my T61 laptop from the
> working tap device are here, latency has been significant decreased, but
> throughput from guest to host has huge regression. I also hit guest
> skb_
On Fri, Oct 23, 2009 at 09:23:40AM -0700, Shirley Ma wrote:
> I also hit guest skb_xmit panic.
If these are the same panics I have seen myself,
they are probably fixed with recent virtio patches
I sent to Rusty. I put them on my vhost.git tree to make
it easier for you to test.
If you see any more
On Fri, Oct 23, 2009 at 09:23:40AM -0700, Shirley Ma wrote:
> I also hit guest skb_xmit panic.
OK, I have fixed a couple of reasons for panic. Will push and
look at host to guest performance soon.
--
MST
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To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message t
On Fri, Oct 23, 2009 at 09:23:40AM -0700, Shirley Ma wrote:
> Hello Michael,
>
> Some initial vhost test netperf results on my T61 laptop from the
> working tap device are here, latency has been significant decreased, but
> throughput from guest to host has huge regression.
Could you please try a
On Fri, Oct 23, 2009 at 12:24:15PM -0700, Shirley Ma wrote:
> Hello Michael,
>
> Some update,
>
> On Fri, 2009-10-23 at 08:12 -0700, Shirley Ma wrote:
> > Tested raw packet, it didn't work;
>
> Tested option -net raw,ifname=eth0, attached to a real device, raw works
> to remote node. I was expe
Hello Michael,
Some update,
On Fri, 2009-10-23 at 08:12 -0700, Shirley Ma wrote:
> Tested raw packet, it didn't work;
Tested option -net raw,ifname=eth0, attached to a real device, raw works
to remote node. I was expecting raw worked to local host.
Does this option "-net raw,ifname=vnet0" sup
Hello Michael,
Some initial vhost test netperf results on my T61 laptop from the
working tap device are here, latency has been significant decreased, but
throughput from guest to host has huge regression. I also hit guest
skb_xmit panic.
netperf TCP_STREAM, default setup, 60 secs run
guest->host
Hello Michael,
Tested raw packet, it didn't work; switching to tap device, it is
working. Qemu command is:
x86_64-softmmu/qemu-system-x86_64 -s /home/xma/images/fedora10-2-vm -m
512 -drive file=/home/xma/images/fedora10-2-vm,if=virtio,index=0,boot=on
-net tap,ifname=vnet0,script=no,downscript=no
On Fri, 2009-10-23 at 13:04 +0200, Michael S. Tsirkin wrote:
> Sridhar, Shirley,
> Could you please test the following patch?
> It should fix a bug on 32 bit hosts - is this what you have?
Yes, it's 32 bit host. I checked out your recent git tree. Looks like
the patch is already there, but vhost d
On Thu, Oct 22, 2009 at 11:00:20AM -0700, Sridhar Samudrala wrote:
> On Thu, 2009-10-22 at 19:43 +0200, Michael S. Tsirkin wrote:
>
> >
> > Possibly we'll have to debug this in vhost in host kernel.
> > I would debug this directly, it's just that my setup is somehow
> > different and I do not see
On Thu, Oct 22, 2009 at 11:00:20AM -0700, Sridhar Samudrala wrote:
> On Thu, 2009-10-22 at 19:43 +0200, Michael S. Tsirkin wrote:
>
> >
> > Possibly we'll have to debug this in vhost in host kernel.
> > I would debug this directly, it's just that my setup is somehow
> > different and I do not see
On Thu, 2009-10-22 at 10:56 -0700, Shirley Ma wrote:
> On Thu, 2009-10-22 at 19:47 +0200, Michael S. Tsirkin wrote:
> > What happens if you reset my tree to commit
> > 47e465f031fc43c53ea8f08fa55cc3482c6435c8?
>
> I am going to clean up my upperstream git tree and retest first. Then
> I
> will try
On Thu, 2009-10-22 at 19:43 +0200, Michael S. Tsirkin wrote:
>
> Possibly we'll have to debug this in vhost in host kernel.
> I would debug this directly, it's just that my setup is somehow
> different and I do not see this issue, otherwise I would not
> waste your time.
>
> Can we add some prin
On Thu, 2009-10-22 at 19:47 +0200, Michael S. Tsirkin wrote:
> What happens if you reset my tree to commit
> 47e465f031fc43c53ea8f08fa55cc3482c6435c8?
I am going to clean up my upperstream git tree and retest first. Then I
will try back up this commit.
> Looks like there are 2 issues:
> - upstrea
On Thu, Oct 22, 2009 at 10:44:29AM -0700, Shirley Ma wrote:
> On Thu, 2009-10-22 at 19:36 +0200, Michael S. Tsirkin wrote:
> > Upstream is Avi's qemu-kvm.git?
> > So, for a moment taking vhost out of the equation, it seems that MSI
> > was
> > broken in Avi's tree again, after I forked my tree?
>
On Thu, Oct 22, 2009 at 10:23:44AM -0700, Shirley Ma wrote:
> On Thu, 2009-10-22 at 15:13 +0200, Michael S. Tsirkin wrote:
> > OK, I sent a patch that should fix the errors for you.
> > Could you please confirm, preferably on-list, whether
> > the patch makes the errors go away for you with
> > use
On Thu, 2009-10-22 at 19:36 +0200, Michael S. Tsirkin wrote:
> Upstream is Avi's qemu-kvm.git?
> So, for a moment taking vhost out of the equation, it seems that MSI
> was
> broken in Avi's tree again, after I forked my tree?
The upper stream qemu git tree never worked for me w/i MSI, the boot
hun
On Thu, Oct 22, 2009 at 10:32:55AM -0700, Shirley Ma wrote:
> On Thu, 2009-10-22 at 10:23 -0700, Shirley Ma wrote:
> > Yes, agreed. One observation is when I enable PCI MSI in guest kernel,
> > I
> > found that even without vhost supportin host kernel the network
> > doesn't
> > work either. So I t
On Thu, 2009-10-22 at 10:23 -0700, Shirley Ma wrote:
> Yes, agreed. One observation is when I enable PCI MSI in guest kernel,
> I
> found that even without vhost supportin host kernel the network
> doesn't
> work either. So I think this is nothing related to vhost. I need to
> find
> why PCI MSI do
On Thu, 2009-10-22 at 15:13 +0200, Michael S. Tsirkin wrote:
> OK, I sent a patch that should fix the errors for you.
> Could you please confirm, preferably on-list, whether
> the patch makes the errors go away for you with
> userspace virtio?
Confirmed, your patch has fixed irq handler mismatch e
On Thu, Oct 22, 2009 at 02:34:56PM +0200, Michael S. Tsirkin wrote:
> On Wed, Oct 21, 2009 at 04:59:20PM -0700, Shirley Ma wrote:
> >
> > Hello Michael,
> >
> > >There was a recent bugfix in qemu-kvm I pushed.
> > >Could you please verify that you have
> > cec75e39151e49cc90c849eab5d0d729667c9e68
On Wed, Oct 21, 2009 at 04:59:20PM -0700, Shirley Ma wrote:
>
> Hello Michael,
>
> >There was a recent bugfix in qemu-kvm I pushed.
> >Could you please verify that you have
> cec75e39151e49cc90c849eab5d0d729667c9e68 ?
>
> Yes, I cloned your qemu-kvm and kernel git.
It seems that the errors you
On Wed, Oct 21, 2009 at 04:59:20PM -0700, Shirley Ma wrote:
>
> Hello Michael,
>
> >There was a recent bugfix in qemu-kvm I pushed.
> >Could you please verify that you have
> cec75e39151e49cc90c849eab5d0d729667c9e68 ?
>
> Yes, I cloned your qemu-kvm and kernel git.
> > I am posting the errors fr
To Shirley Ma/Beaverton/i...@ibmus
>[cid] *
> cc David Stevens/Beaverton/i...@ibmus,
> 10/21/2009 01:19 kvm@vger.kernel.org,
> s...@linux.vnet.ibm.com
> PM [cid] *
>
On Wed, Oct 21, 2009 at 12:59:50PM -0700, Shirley Ma wrote:
> Hello Micahel,
>
> I have set up guest kernel 2.6.32-rc5 with MSI configured. Here are errors
> what
> I have got:
>
> 1. First, qemu complained extboot.bin not found, I copied the file from
> optionrom/ dir to pc-bios/ dir, this prob
cc
> AMDavid Stevens/Beaverton/i...@ibmus,
>kvm@vger.kernel.org,
> s...@
Shirley Ma/Beaverton/i...@ibmus
> 10/20/2009 04:34 cc
> AMs...@linux.vnet.ibm.com, David
>Stevens/Beaverton/i...@ibmus,
&
cc David
> Stevens/Beaverton/i...@ibmus, Shirley Ma/
> Beaverton/i...@ibmus
>[cid] *
>Subject Re: vhost-net patches
>
> > > > Hi Michael,
> > > >
> > > > We are trying out your vhost-net patches from your git trees on
> > > > kernel.org.
> > > > I am using mst/vhost.git as host kernel and mst/qemu-kvm.git for qemu.
> > > >
> >
On Sun, 2009-10-18 at 19:32 +0200, Michael S. Tsirkin wrote:
> On Sun, Oct 18, 2009 at 12:53:56PM +0200, Michael S. Tsirkin wrote:
> > On Fri, Oct 16, 2009 at 12:29:29PM -0700, Sridhar Samudrala wrote:
> > > Hi Michael,
> > >
> > > We are trying out your vhos
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