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Subject: Re: mlx4en, timer irq @100%...
To: Ben RUBSON <ben.rubson@gmail.com>, FreeBSD Net <freebsd-net@freebsd.org>, 
 Gleb Smirnoff <glebius@FreeBSD.org>
References: <BF3A3E47-A726-49FB-B83F-666EFC5C0FF1@gmail.com>
 <72b9de84-5572-3737-b274-34d2c5cdf634@selasky.org>
 <91DCB96E-4C08-44C5-94E7-E7C686DEFE5F@gmail.com>
From: Hans Petter Selasky <hps@selasky.org>
Message-ID: <c3fdf0bb-833d-915f-c246-9459819cd825@selasky.org>
Date: Fri, 4 Aug 2017 19:31:07 +0200
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On 08/04/17 19:13, Ben RUBSON wrote:
>     12 100029 intr             swi4: clock (0)  tcp_tw_2msl_scan pfslowtimo softclock_call_cc softclock intr_event_execute_handlers ithread_loop fork_exit fork_trampoline

Hi,

Can you "procstat -ak" a few times and grep for swi4. If the entry above 
does not disappear this is the culpit. Either the callout list is 
corrupted or there is an issue inside tcp_tw_2msl_scan().


I'm CC'ing Glebius hence he's been involved with timer issues in the 
kernel earlier.


--HPS