From: Alejandro Lucero <alejandro.lucero@netronome.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 0/5] net/nfp logging fixes
Date: Thu, 26 Apr 2018 19:14:24 +0100 [thread overview]
Message-ID: <CAD+H991ZfVVdjNRD+TrSF8HudzU3SHpf5XWySEzvrLZcvYkegA@mail.gmail.com> (raw)
In-Reply-To: <20180426084253.1a615c82@xeon-e3>
On Thu, Apr 26, 2018 at 4:42 PM, Stephen Hemminger <
stephen@networkplumber.org> wrote:
> On Thu, 26 Apr 2018 13:52:53 +0100
> Alejandro Lucero <alejandro.lucero@netronome.com> wrote:
>
> > Hi Stephen,
> >
> > Thanks for this patch set.
> >
> > I'm happy with it although I have some concerns regarding how the dynamic
> > logs work, or maybe I have a wrong understanding about it. I have tried
> to
> > read some doc about how it works, and I found the original patch from
> > Olivier the best source, so maybe things have changed a bit and my
> concerns
> > are unfounded.
> >
> > I think it is OK to specifically add something like
> >
> > --log-level='pmd\.i40e.*,8'
> >
> > if you want to debug a PMD, but if you are an user and you just want to
> > know why the app is not finding any port, finding out the right string is
> > not trivial. For example, with an PF, the NFP PMD goes through a process
> > where the NFP device (no the NIC) is accessed first through a complex
> > interface, then firmware is uploaded, DPDK ports created (for multiport
> > devices), etc. I think any error in that process should be output if the
> > right loglevel is there and not just if the right log type was
> specifically
> > enabled. Is this what would happen with your patchset?
>
> Most drivers set default log level to NOTICE. Then if they see something
> obviously wrong it will show up if the right log level is used.
> For the case of finding out why no drivers are found then doing
> something like
> --log-level='pmd.*:info'
> would be useful.
>
> Latest version makes regex optional and allows symbolic levels.
>
>
> > I have suffered silent configuration problems, like the NFP card being in
> > the wrong NUMA socket, and although I can solve that quickly because I
> have
> > the knowledge, other people using NFP with DPDK require someone to help
> > because they do not know what is going on. And this is usually bad
> because
> > they have another NIC card in the same host (in the right NUMA socket)
> and
> > the app just works smoothly then, leaving our NIC with a bad press. So I
> > think, some errors should always appear with the right loglevel
> configured.
>
> Driver should definitely use level > INFO for things that are wrong.
>
>
Uhmm, yes. I think I need to submit some changes to the level of most of
the PMD messages.
Thanks for the heads up.
I have reviewed and tested the patches and they all seem all right.
Acked-by: Alejandro Lucero <alejandro.lucero@netronome.com>
Tested-by: Alejandro Lucero <alejandro.lucero@netronome.com>
next prev parent reply other threads:[~2018-04-26 18:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-25 15:45 Stephen Hemminger
2018-04-25 15:45 ` [dpdk-dev] [PATCH 1/5] net/nfp: use correct logtype for init messages Stephen Hemminger
2018-04-25 15:45 ` [dpdk-dev] [PATCH 2/5] net/nfp: add implied new line to PMD_DRV_LOG Stephen Hemminger
2018-04-25 15:45 ` [dpdk-dev] [PATCH 3/5] net/nfp: fix double space in init log Stephen Hemminger
2018-04-25 15:45 ` [dpdk-dev] [PATCH 4/5] net/nfl: add newline in PMD_RX/TX_LOG macros Stephen Hemminger
2018-04-25 15:45 ` [dpdk-dev] [PATCH 5/5] net/nfp: use dynamic logging everywhere Stephen Hemminger
2018-04-26 12:52 ` [dpdk-dev] [PATCH 0/5] net/nfp logging fixes Alejandro Lucero
2018-04-26 15:42 ` Stephen Hemminger
2018-04-26 18:14 ` Alejandro Lucero [this message]
2018-04-26 21:52 ` Ferruh Yigit
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