[Qemu-devel] Is there more trace-events in vhost module?

[Qemu-devel] Is there more trace-events in vhost module?

[Sam]

hi all，

I'm debuging ovs-2.6.0, dpdk-2.2.0 and qemu-2.6.0. And I run such command:

QEMU_CMD -D qemu-log.log -trace events=qemu-events ...

I want to trace vhost-user protocol process between QEMU and ovs-dpdk.
Ovs-dpdk's log shows lots of infomations of vhost-user protocol, but QEMU's
log shows only a little.

As in qemu-events, there is only 'vhost_user_event' event I could use. Is
there more events or some other method to debug vhost related module in
QEMU?

Re: [Qemu-devel] Is there more trace-events in vhost module?

[Stefan Hajnoczi]

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On Mon, Jun 12, 2017 at 08:21:07PM +0800, Sam wrote:
> I'm debuging ovs-2.6.0, dpdk-2.2.0 and qemu-2.6.0. And I run such command:
> 
> QEMU_CMD -D qemu-log.log -trace events=qemu-events ...
> 
> I want to trace vhost-user protocol process between QEMU and ovs-dpdk.
> Ovs-dpdk's log shows lots of infomations of vhost-user protocol, but QEMU's
> log shows only a little.
> 
> As in qemu-events, there is only 'vhost_user_event' event I could use. Is
> there more events or some other method to debug vhost related module in
> QEMU?

vhost_user_event is the only QEMU trace event that currently exists for
vhost-user.

Guidelines for submitting patches are here if you decide to add more:
http://wiki.qemu.org/Contribute/SubmitAPatch

Stefan

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