From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: "Legacy, Allain" <Allain.Legacy@windriver.com>
Cc: "mtetsuyah@gmail.com" <mtetsuyah@gmail.com>,
"maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Peters, Matt" <Matt.Peters@windriver.com>,
Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [dpdk-dev] [PATCH] vhost: change mbuf allocation logs to debug
Date: Wed, 29 Mar 2017 15:01:50 +0800 [thread overview]
Message-ID: <20170329070150.GF18844@yliu-dev.sh.intel.com> (raw)
In-Reply-To: <70A7408C6E1BFB41B192A929744D8523968F8CC8@ALA-MBC.corp.ad.wrs.com>
On Tue, Mar 28, 2017 at 11:39:37AM +0000, Legacy, Allain wrote:
> > -----Original Message-----
> > From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> > Sent: Tuesday, March 28, 2017 2:49 AM
> <...>
> > > In order to prevent this condition, but
> > > still enable debugging, the logs are being changed to debug logs to ensure
> > > they are not emitted unless the CONFIG_RTE_LIBRTE_VHOST_DEBUG
> > option is
> > > enabled.
> >
> > That basically means you will never see them in real life. I'm suggesting
> > to add a new log API, RTE_LOG_ONCE. Sounds good?
>
>
> Rather than a log what is really needed here is a stat/counter, but this library does not have the infrastructure in place to support reporting datapath errors via stats back to the application.
Right. It's supposed to be done in vhost-pmd, while the real Rx implementation
is at vhost lib.
> Are there any plans to add a stats infrastructure or a desired design for what that would look like?
We could have such counter support once we move virtio_net.c to vhost-pmd.
Unluckily, I don't think it will happen soon.
OTOH, it's still good to have RTE_LOG_ONCE. It explicitly tells you something
is wrong, then you could dump those stats for more info.
--yliu
next prev parent reply other threads:[~2017-03-29 7:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-27 16:29 Allain Legacy
2017-03-28 6:48 ` Yuanhan Liu
2017-03-28 11:39 ` Legacy, Allain
2017-03-29 7:01 ` Yuanhan Liu [this message]
2017-03-29 22:45 ` Legacy, Allain
2017-03-30 1:49 ` Yuanhan Liu
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