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Date:      Wed, 14 Sep 2016 15:04:20 -0700
From:      hiren panchasara <hiren@strugglingcoder.info>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        freebsd-stable@FreeBSD.org
Subject:   Re: 11.0 stuck on high network load
Message-ID:  <20160914220420.GW9397@strugglingcoder.info>
In-Reply-To: <20160914215714.GK2840@zxy.spb.ru>
References:  <20160904215739.GC22212@zxy.spb.ru> <20160905014612.GA42393@strugglingcoder.info> <20160914213503.GJ2840@zxy.spb.ru> <20160914214306.GU9397@strugglingcoder.info> <20160914215714.GK2840@zxy.spb.ru>

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On 09/15/16 at 12:57P, Slawa Olhovchenkov wrote:
> On Wed, Sep 14, 2016 at 02:43:06PM -0700, hiren panchasara wrote:
>=20
> > On 09/15/16 at 12:35P, Slawa Olhovchenkov wrote:
> > > On Sun, Sep 04, 2016 at 06:46:12PM -0700, hiren panchasara wrote:
> > >=20
> > > > 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 g=
o to
> > > > > unresponsible state -- no reaction to network and console (USB IP=
MI
> > > > > emulation). INVARIANTS give to high overhad. Is this exist some w=
ay to
> > > > > debug this?
> > > >=20
> > > > Can you panic it from console to get to db> to get backtrace and ot=
her
> > > > info when it goes unresponsive?
> > >=20
> > > ipmi console don't respond (chassis power diag don't react)
> > > login on sol console stuck on *tcp.
> >=20
> > I assume you tried ~^b (tilda followed by ctrl+b) without success?
>=20
> ~B, as in man ipmitool

No, not shift-b but ctrl-b.

I am not aware of ipmitool reference. On unresponsive console, try
~^b (tilda followed by ctrl+b)

>=20
> > That usually drops into db>
>=20
> May be now need some sysctl for enable this?

There is a sysctl for this too but on console, the keystrokes I said
should work, imo.

Cheers,
Hiren

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