Date: Wed, 1 Apr 2015 01:59:47 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: irq cpu binding Message-ID: <20150331225947.GC23643@zxy.spb.ru> In-Reply-To: <CAJ-Vmo=R5J=LT9ntgZJ4xHZwn8_WEAUC=3wSqPKn3=z8ki_N6A@mail.gmail.com> References: <20150328112035.GZ23643@zxy.spb.ru> <CAJ-Vmo=sxtLgn1HABbWchu1Hm8kZ4Qy%2BscPeD7ezkkBzr%2BQijA@mail.gmail.com> <20150328154031.GA23643@zxy.spb.ru> <CAJ-VmokpWNy-arZ_=4hNbyAvzBYgDWu4F=vYSDwqPgpjaGHk=w@mail.gmail.com> <20150328181026.GB23643@zxy.spb.ru> <CAJ-Vmok=0=C%2BHLvLXEM5pbYp_zP6C498wudAfEA40s4AVpGa_w@mail.gmail.com> <20150328183147.GC23643@zxy.spb.ru> <CAJ-VmokPdnOSASLcrzHtqs_r6GfUW6Q5ap7r9Tnp1OvKhDh20A@mail.gmail.com> <20150328192505.GD23643@zxy.spb.ru> <CAJ-Vmo=R5J=LT9ntgZJ4xHZwn8_WEAUC=3wSqPKn3=z8ki_N6A@mail.gmail.com>
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On Sat, Mar 28, 2015 at 12:33:52PM -0700, Adrian Chadd wrote:
> That's done deferred by the bus interrupt wiring. That's something
> John's been looking into as part of the general NUMA work (and I'm
> trying to debug right now, on dual-socket boxes with ixgbe. :-)
>
> Look at bus_bind_intr() and the twisty path to intr_event_bind(), then
> x86/x86/intr_machdep.c:intr_assign_cpu(), then intr_shuffle_cpus() at
> boot, versus what happens via calls to pic_assign_cpu to setup the
> wiring.
I am do simple, ugle hack ixgbe driver for let start cpu binding.
I am still see ixgbe in pmc output.
What may be wrong?
What may be miss?
=====
static int ixgbe_start_cpu = 0;
TUNABLE_INT("hw.ix.start_cpu", &ixgbe_start_cpu);
SYSCTL_INT(_hw_ix, OID_AUTO, start_cpu, CTLFLAG_RDTUN, &ixgbe_start_cpu, 0,
"Start CPU for next IRQ binding");
[...]
if (adapter->num_queues > 1)
bus_bind_intr(dev, que->res, i+ixgbe_start_cpu);
#ifndef IXGBE_LEGACY_TX
TASK_INIT(&txr->txq_task, 0, ixgbe_deferred_mq_start, txr);
#endif
TASK_INIT(&que->que_task, 0, ixgbe_handle_que, que);
que->tq = taskqueue_create_fast("ixgbe_que", M_NOWAIT,
taskqueue_thread_enqueue, &que->tq);
taskqueue_start_threads(&que->tq, 1, PI_NET, "%s que",
device_get_nameunit(adapter->dev));
}
ixgbe_start_cpu += adapter->num_queues;
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