From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH 0/2] adding tracepoints to vhost
Date: Tue, 10 Apr 2012 15:42:51 +0300
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To: Stefan Hajnoczi <stefanha@gmail.com>
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On Tue, Apr 10, 2012 at 12:40:50PM +0100, Stefan Hajnoczi wrote:
> On Tue, Apr 10, 2012 at 3:58 AM, Jason Wang <jasowang@redhat.com> wrote:
> > To help in vhost analyzing, the following series adding basic tracepoin=
ts to
> > vhost. Operations of both virtqueues and vhost works were traced in cur=
rent
> > implementation, net code were untouched. A top-like satistics displayin=
g script
> > were introduced to help the troubleshooting.
> >
> > TODO:
> > - net specific tracepoints?
> >
> > ---
> >
> > Jason Wang (2):
> > =A0 =A0 =A0vhost: basic tracepoints
> > =A0 =A0 =A0tools: virtio: add a top-like utility for displaying vhost s=
atistics
> >
> >
> > =A0drivers/vhost/trace.h =A0 | =A0153 ++++++++++++++++++++
> > =A0drivers/vhost/vhost.c =A0 | =A0 17 ++
> > =A0tools/virtio/vhost_stat | =A0360 +++++++++++++++++++++++++++++++++++=
++++++++++++
> > =A03 files changed, 528 insertions(+), 2 deletions(-)
> > =A0create mode 100644 drivers/vhost/trace.h
> > =A0create mode 100755 tools/virtio/vhost_stat
> =

> Perhaps this can replace the vhost log feature?  I'm not sure if
> tracepoints support the right data types but it seems like vhost
> debugging could be done using tracing with less code.
> =

> Stefan

vhost log is not a debugging tool, it logs memory accesses for
migration.