getting particular thread cpu time
julian at elischer.org
Wed Feb 1 11:20:18 PST 2006
Daniel Eischen wrote:
>On Wed, 1 Feb 2006, Ilya E Veretenkin wrote:
>>I am writing a multi-threaded application and want to see the cpu
>>usage of each thread of this application.
>>I know that 'ps -H' outputs cpu usage information for threads, but how
>>can I found out the correspondence between particular thread in 'ps-H'
>>output and particular thread ID in my application?
>You can't, unless:
> 1) Every thread is system scope; or
> 2) You use libthr where every thread maps 1:1 to a kernel thread
>Even then, I don't know whether CPU usage is maintained correctly
>yet by the kernel for a multi-threaded process. Someone has been
>working on it recently.
>Libpthread is M:N by default, so the kernel doesn't know about
though we might think about ways that we can get that information..
maybe a way that the user thread scheduler can be asked for the info?
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