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? Cheers, Hiren -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 603 bytes Desc: not available URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20160904/7cad6ad8/attachment.sig>
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> Cheers, > Hiren_______________________________________________ freebsd-stable at freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
On Mon, Sep 5, 2016 at 1:43 AM, Slawa Olhovchenkov <slw at 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 reactionSo 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. This is on our FreeBSD-10 stable based fork.>From my debugging, we go from totally fine as far as I can tell fromps, etc in the moments leading to the hang to being totally wedged. It seems a very sudden-onset condition. Sound at all familiar? Warner
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?ipmi console don't respond (chassis power diag don't react) login on sol console stuck on *tcp.