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From: Vinicius Costa Gomes <vinicius.gomes@intel.com>
To: Davidlohr Bueso <dave@stgolabs.net>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: WARNING: at net/sched/sch_generic.c:448
Date: Fri, 25 Oct 2019 15:26:06 -0700	[thread overview]
Message-ID: <875zkcxy0x.fsf@linux.intel.com> (raw)
In-Reply-To: <20191024204134.egc5mdtz2o2tsxyz@linux-p48b>

Hi,

Davidlohr Bueso <dave@stgolabs.net> writes:

> I am able to trigger this a few seconds into running pi_stress (from
> rt-tests, quite a non network workload). But this is not the only one.
> I'm going through some logs to see what other test is triggering it.

Looking at the at the caveats section of pi_stress(8), this is expected:

"The pi_stress test threads run as SCHED_FIFO or SCHED_RR threads, which
means that they can starve critical system threads. It is advisable to
change the scheduling policy of critical system threads to be SCHED_FIFO
prior to running pi_stress and use a priority of 10 or higher, to
prevent those threads from being starved by the stress test."

Are the other workloads similar to pi_stress?


Cheers,
--
Vinicius



      reply	other threads:[~2019-10-25 22:24 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-24  3:21 WARNING: at net/sched/sch_generic.c:448 Davidlohr Bueso
2019-10-24 19:50 ` Vinicius Costa Gomes
2019-10-24 20:41   ` Davidlohr Bueso
2019-10-25 22:26     ` Vinicius Costa Gomes [this message]

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