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Message-ID: <20221207172321.7da162c7@kernel.org>
Date: Wed, 7 Dec 2022 17:23:21 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: <yang.yang29@....com.cn>
Cc: <edumazet@...gle.com>, <davem@...emloft.net>, <pabeni@...hat.com>,
<bigeasy@...utronix.de>, <imagedong@...cent.com>,
<kuniyu@...zon.com>, <petrm@...dia.com>, <liu3101@...due.edu>,
<wujianguo@...natelecom.cn>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <tedheadster@...il.com>
Subject: Re: [PATCH linux-next] net: record times of netdev_budget exhausted
On Thu, 8 Dec 2022 09:12:06 +0800 (CST) yang.yang29@....com.cn wrote:
> > Sorry if this is too direct, but it seems to me like you're trying hard
> > to find something useful to do in this area without a clear use case.
>
> I see maybe this is a too special scenes, not suitable. The motivation
> is we see lots of time_squeeze on our working machines, and want to
> tuning, but our kernel are not ready to use threaded NAPI. And we
Ah, in that cases I indeed misjudged, sorry.
> did see performance difference on different netdev_budget* in
> preliminary tests.
Right, the budget values < 100 are quite impractical. Also as I said
time_squeeze is a terrible metric, if you can find a direct metric
in terms of application latency or max PPS, that's much more valuable.
> > We have coding tasks which would definitely be useful and which nobody
> > has time to accomplish. Please ask if you're trying to find something
> > to do.
>
> We focus on 5G telecom machine, which has huge TIPC packets in the
> intranet. If it's related, we are glad to do it with much appreciate of your
> indicate!
Oh, unfortunately most of the tasks we have are around driver
infrastructure.
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