Re: [dpdk-users] How to show debug log in DPDK and DPDK application

[Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp>]

> On Fri, 21 Dec 2018 09:48:04 +0900
> Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp> wrote:
> 
> > Hello 
> > 
> > I am a developer for DPDK application(SPP).
> > And I have a very basic question how to debug by
> > increasing log level.
> > 
> > Q1.Are thre any documents those describe the following?
> > - how to output debug log of DPDK
> > - how to output debut log of DPDK application
> > 
> > As I did quick search on Google, no official documents found.
> > If above is yes.
> > Please let me know how to achieve those.
> > 
> > Thanks in advance for your guidance to newbie!
> > 
> > BR,
> > Hideyuki Yamashita
> > NTT TechnoCross
> > 
> > 
> 
> logging in current DPDK is controlled per subsystem.
> 
> See: rte_log_set_level_pattern and rte_set_level
> 
> This can be set on command line or with API.
> 
> The default log output on DPDK is to stdout of the application.
> This is not useful for a long running service like a daemon,
> but the log can be captured by either opening a file and using:
>  rte_openlog_stream
> 
> Or also by using glibc stdio function open_memstream to make a memory stream
> and pass that. This requires a bit more setup.
Hello Stephen,

Thaks for your guidance.
I will read those.

But at a glance, it looks like those are in API documents and 
I wondered if those are well documented in somewhere
in developers guide so that developers like me can 
easily find the path.

What do you think?

Thanks!

BR,
Hideyuki
NTT TechnoCross