On Monday, September 5, 2016, Warner Losh <i...@bsdimp.com <javascript:_e(%7B%7D,'cvml','i...@bsdimp.com');>> wrote:
> On Mon, Sep 5, 2016 at 1:43 AM, Slawa Olhovchenkov <s...@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? > > 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. > Try to set kern.sched.preempt_thresh sysctl to 224 to get back your > console.. > 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 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" > _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
