From: "Wiles, Keith" <keith.wiles@intel.com>
To: Olivier Matz <olivier.matz@6wind.com>
Cc: Thomas Monjalon <thomas.monjalon@6wind.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"david.marchand@6wind.com" <david.marchand@6wind.com>
Subject: Re: [dpdk-dev] [PATCH] log: do not drop debug logs at compile time
Date: Mon, 3 Oct 2016 15:27:56 +0000 [thread overview]
Message-ID: <D18F01AF-30AB-4433-B769-651ACF75F004@intel.com> (raw)
In-Reply-To: <f6563886-b2f5-112b-2264-0e1a6c2be001@6wind.com>
Regards,
Keith
> On Oct 3, 2016, at 10:02 AM, Olivier Matz <olivier.matz@6wind.com> wrote:
>
> Hi Keith,
>
> On 09/30/2016 05:48 PM, Wiles, Keith wrote:
>>> On Sep 30, 2016, at 4:33 AM, Thomas Monjalon <thomas.monjalon@6wind.com> wrote:
>>>
>>> 2016-09-16 09:43, Olivier Matz:
>>>> Today, all logs whose level is lower than INFO are dropped at
>>>> compile-time. This prevents from enabling debug logs at runtime using
>>>> --log-level=8.
>>>>
>>>> The rationale was to remove debug logs from the data path at
>>>> compile-time, avoiding a test at run-time.
>>>>
>>>> This patch changes the behavior of RTE_LOG() to avoid the compile-time
>>>> optimization, and introduces the RTE_LOG_DP() macro that has the same
>>>> behavior than the previous RTE_LOG(), for the rare cases where debug
>>>> logs are in the data path.
>>>>
>>>> So it is now possible to enable debug logs at run-time by just
>>>> specifying --log-level=8. Some drivers still have special compile-time
>>>> options to enable more debug log. Maintainers may consider to
>>>> remove/reduce them.
>>>>
>>>> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
>>>
>>> I think it is a good change.
>>> However I'm not sure we should take it for 16.11 as it was sent late and
>>> there is no review comment.
>>> It is neither really a fix nor really a feature.
>>> If there are some +1, and no opinions against, it will go in 16.11.
>>> Note that some drivers would need some changes to fully benefit of
>>> debug logs enabled at run-time.
>>
>> Would this be easier to add a new LOG level instead say DEBUG_DATAPATH and then change the RTE_LOG to exclude the new log level?
>>
>>
>
> The log levels are quite standard, I don't feel it would be very clear
> to have a new level for that. It would also prevent to have different
> log level inside data path.
I am not following you here. Having one more log level for DEBUG in the data path is not a big change and you can still have any other log level in the data or anyplace else for that matter.
>
> Regards,
> Olivier
next prev parent reply other threads:[~2016-10-03 15:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-16 7:43 Olivier Matz
2016-09-30 9:33 ` Thomas Monjalon
2016-09-30 15:48 ` Wiles, Keith
2016-10-03 15:02 ` Olivier Matz
2016-10-03 15:27 ` Wiles, Keith [this message]
2016-10-03 15:37 ` Olivier Matz
2016-10-03 16:27 ` Wiles, Keith
2016-10-04 8:28 ` David Marchand
2016-10-05 12:01 ` Olivier Matz
2016-10-04 8:26 ` David Marchand
2016-10-05 11:57 ` Olivier Matz
2016-11-23 15:34 ` [dpdk-dev] [PATCH v2] " Olivier Matz
2016-12-05 14:08 ` Thomas Monjalon
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