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Date:      Sat, 28 Mar 2015 10:43:07 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
Subject:   Re: irq cpu binding
Message-ID:  <CAJ-VmokpWNy-arZ_=4hNbyAvzBYgDWu4F=vYSDwqPgpjaGHk=w@mail.gmail.com>
In-Reply-To: <20150328154031.GA23643@zxy.spb.ru>
References:  <20150328112035.GZ23643@zxy.spb.ru> <CAJ-Vmo=sxtLgn1HABbWchu1Hm8kZ4Qy%2BscPeD7ezkkBzr%2BQijA@mail.gmail.com> <20150328154031.GA23643@zxy.spb.ru>

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On 28 March 2015 at 08:40, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
> On Sat, Mar 28, 2015 at 08:20:08AM -0700, Adrian Chadd wrote:
>
>> On 28 March 2015 at 04:20, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
>> > Can someone describe how on FreeBSD/amd64 do interrupt handling?
>> > Can be interrupt handler (hardware interrupt) direct dispatch to
>> > specific CPU core (and only to this core)?
>> > Can be all work be only on this core (ithread, device driver interrupt
>> > handler, finalise)?
>>
>> Yes - you can use cpuset on the interrupt to get them bound that way.
>>
>> John and I are trying to make that whole process more automated and
>> NUMA friendly. I'm debugging some of his work at the moment.
>
> cpuset don't work as expected -- I see irq handling on other cpu.

Well, when you see "irq handling on other cpu", what do you mean?

How are you using cpuset to move things around?



-a



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