Date: Wed, 7 Sep 2016 00:03:50 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Warner Losh <imp@bsdimp.com> Cc: hiren panchasara <hiren@strugglingcoder.info>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: 11.0 stuck on high network load Message-ID: <20160906210349.GL34394@zxy.spb.ru> In-Reply-To: <CANCZdfoOqVGxiytKRhpFgT6N1EbKyP3qqyj2QQzTbUSPzAQW0A@mail.gmail.com> References: <20160904215739.GC22212@zxy.spb.ru> <20160905014612.GA42393@strugglingcoder.info> <20160905074348.GE34394@zxy.spb.ru> <CANCZdfoOqVGxiytKRhpFgT6N1EbKyP3qqyj2QQzTbUSPzAQW0A@mail.gmail.com>
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On Mon, Sep 05, 2016 at 10:14:59AM -0600, Warner Losh wrote: > On Mon, Sep 5, 2016 at 1:43 AM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > > On Sun, Sep 04, 2016 at 06:46:12PM -0700, hiren panchasara wrote: > > > >> On 09/05/16 at 12:57P, Slawa Olhovchenkov wrote: > >> > I am try using 11.0 on Dual E5-2620 (no X2APIC). > >> > Under high network load and may be addtional conditional system go to > >> > unresponsible state -- no reaction to network and console (USB IPMI > >> > emulation). INVARIANTS give to high overhad. Is this exist some way to > >> > debug this? > >> > >> Can you panic it from console to get to db> to get backtrace and other > >> info when it goes unresponsive? > > > > no > > no reaction > > So the canonical 'ipmitool chassis power diag' doesn't send an NMI to > get you to the debugger? This supermicro MB don't interact with ipmitool over lan :( either chassis power diag and sol > I've seen this at Netflix on one variant of our flash offload box with > a Intel e5-2697v2 running with the Chelsio driver. We're working > around it by having fewer receive threads than CPUs in the system. The > only way the boxes would come back was with watchdog. The load was > streaming video > ~36Gbps out 4 lagged 10G ports. Console is totally > unresponsive as well. This is on our FreeBSD-10 stable based fork. > >From my debugging, we go from totally fine as far as I can tell from > ps, etc in the moments leading to the hang to being totally wedged. It > seems a very sudden-onset condition. Sound at all familiar? > > Warner
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