Re: looking for a function

[Chris Snook <csnook@redhat.com>]

Xu Yang wrote:
> Hi Bernd,
> 
> thanks for you reply.
> 
> yes, I know the thread migrates all the time, this is exactly what I
> would like to observe. I would like to learn about the thread
> migration of some specific scheduling algorithm. so ....
> 
> any idea about the function?
> 
> Best regards,
> 
> Yang

getcpu() should do what you want.

-- Chris

> 2008/9/16, Bernd Petrovitsch <bernd@firmix.at>:
>> Hi!
>>
>> On Tue, 2008-09-16 at 14:50 +0200, Xu Yang wrote:
>>> Hi guys,
>>>
>>> I am looking for a function that can show me the current thread is
>>> running on which cpu.
>>> e.g I am using pthread to write a multithreaded program, in each
>>> thread I would like to insert such kind of function so that I can know
>>> on which cpu this thread is running on.
>> That doesn't make much sense as the same thread can run on a different
>> CPU after each scheduling decision. And - as it is in userspace -
>> scheduling can happen before any assembler op.
>>
>>        Bernd
>> --
>> Firmix Software GmbH                   http://www.firmix.at/
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>>          Embedded Linux Development and Services
>>
>>
>>
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