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Date:      Sun, 29 Apr 2012 18:06:09 +0200
From:      Oliver Pinter <oliver.pntr@gmail.com>
To:        Alexander Motin <mav@freebsd.org>
Cc:        freebsd-stable@freebsd.org, Alex Kozlov <spam@rm-rf.kiev.ua>
Subject:   Re: High load event idl.
Message-ID:  <CAPjTQNHR0gx8mEi6_1CXV60bw5Y-3WyraWRhN7zRPHC2V6BFwA@mail.gmail.com>
In-Reply-To: <4F9D4491.2060007@FreeBSD.org>
References:  <20120427213459.GA61125@pcjas.obspm.fr> <4F9B946D.3030607@FreeBSD.org> <CAPjTQNGts290DyjORNfir8_rZ5S_vdog%2BJMEBA9mc2vJhUa=jg@mail.gmail.com> <4F9CCEF2.6050609@FreeBSD.org> <20120429155512.M91148@sola.nimnet.asn.au> <4F9CDE91.1060300@FreeBSD.org> <CAPjTQNF=0Hgq_7BxeK_8o6DRQ%2BUJ_r94Y3PqwF8f_ccDeA_hHQ@mail.gmail.com> <4F9D2F0C.4050501@FreeBSD.org> <20120429122714.GA56829@ravenloft.kiev.ua> <4F9D3DF8.9000800@FreeBSD.org> <20120429133056.GA58422@ravenloft.kiev.ua> <4F9D4491.2060007@FreeBSD.org>

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On 4/29/12, Alexander Motin <mav@freebsd.org> wrote:
> On 04/29/12 16:30, Alex Kozlov wrote:
>> On Sun, Apr 29, 2012 at 04:11:20PM +0300, Alexander Motin wrote:
>>> On 04/29/12 15:27, Alex Kozlov wrote:
>>>> On Sun, Apr 29, 2012 at 03:07:40PM +0300, Alexander Motin wrote:
>>>>> On 04/29/12 15:04, Oliver Pinter wrote:
>>>>>> Removing dummynet from kernel don't chanage anything, that is
>>>>>> releated
>>>>>> to load average. The loadavg hold to 0.70 +/- 0.2. (single user : sh
>>>>>> +
>>>>>> top)
>>>>>
>>>>> New ktr dump?
>>>> I have similar issue on one of my laptops. Should I provide ktr dump?
>>>> http://lists.freebsd.org/pipermail/freebsd-current/2011-September/027133.html
>>> In your case HPET also shares interrupt with other devices. I suspect
>>> that may be a reason. Every time when swi thread runs loadavg, other CPU
>>> runs shared interrupt handler, that is accounted as result. Please show
>>> your verbose dmesg.
>> Attached.
>
> In your case HPET could solely use IRQ22 that seems free now. After
> recent changes in ACPI code it is detected before PCI devices and so
> doesn't avoids sharing. You may try to hint it specific IRQ by adding to
> loader,conf line:
> hint.hpet.0.allowed_irqs="0x00400000"
>
> --
> Alexander Motin

The hint.hpet.0.allowed_irqs="0x00400000" fixed the issue, thanks.

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