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Date:      Sun, 15 Apr 2012 22:11:16 +0200
From:      "Ronald Klop" <ronald-freebsd8@klop.yi.org>
To:        freebsd-stable@freebsd.org
Subject:   Re: 157k interrupts per second causing 60% CPU load on idle system
Message-ID:  <op.wcto02x28527sy@pinky>
In-Reply-To: <CACM2%2B-7_ybJQFpK95fk3MbivLwFb-2rBMEoaygLCTtiyW2bT5Q@mail.gmail.com>
References:  <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com> <4F6A67C0.7000909@sentex.net> <CACM2%2B-6BubOF1uWtXcBQyZqeiuqhvXazL9564CwN9uhJVNe2_w@mail.gmail.com> <4F6B3B46.4060105@sentex.net> <CACM2%2B-6J%2BkaV3aCudDNztDFefo602kTJZ-S99HB%2Bjhxe-tu5XA@mail.gmail.com> <CACM2%2B-7DrENh5ZBs-6vkSrH1szMqnYKi2acmzByAOgXdZvHZMg@mail.gmail.com> <CAOjFWZ5nhT5NPLnn_Bh7oDa0fC5KbfDE1aHA_e%2BX9iebxkLEaA@mail.gmail.com> <CACM2%2B-5ujs-kz9SNV7jwEU4Df5un5H=%2BqY%2B3Z0WSxj=7v8f8uQ@mail.gmail.com> <CACM2%2B-4_3p3-q74=PJMNbD65fiijf-9KYfzUTdEhsawwAQYRRw@mail.gmail.com> <CACM2%2B-6o4D0=dohhHLONzF7_fs9tkgrC7vOFUcbA_RusMmZeBQ@mail.gmail.com> <op.wcss1tvt8527sy@pinky> <CACM2%2B-7_ybJQFpK95fk3MbivLwFb-2rBMEoaygLCTtiyW2bT5Q@mail.gmail.com>

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On Sun, 15 Apr 2012 15:09:34 +0200, Matt Thyer <matt.thyer@gmail.com>  
wrote:

> On Apr 15, 2012 6:27 PM, "Ronald Klop" <ronald-freebsd8@klop.yi.org>  
> wrote:
>>
>>> The problem does not occur with 9-STABLE.
>>>
>>> Who knows what the problem was ? USB maybe ?
>>
>>
>> Do you still have the same hardware on the same interrupts on 9-STABLE?
>> Are there changes in the use of MSI(-X)?
>>
> I made no hardware or BIOS changes and I'm running a GENERIC kernel in  
> all
> testing.

That does not mean FreeBSD 9 can't put devices on other interrupts than 8  
did.
'dmesg | grep irq' like you did before might show a difference with your  
previous output.
I'm just guessing here for a clue on the result you are seeing, but  
without any data I cannot answer you (and I guess nobody can).

Ronald.



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