kernel thread as real threads..

Scott Long scottl at
Fri Jan 20 11:23:55 PST 2006

Julian Elischer wrote:

> Kris Kennaway wrote:
>> Correct me if I'm wrong, but the stats aren't accounted to the parent
>> process either.  I'm pretty sure I've seen situations where a thread
>> was using a lot of CPU, but if you believe top(1) then every process
>> in the system is idle (except for the fact that the system is 0%
>> idle).  In this situation there's no way to tell which threaded
>> process is using resources.
> you may be right.. I plan to examine stats over the next week as part of 
> the kernel threads work.
> I may be able to improve the situation.

Um, would this be considered a security flaw, since process time limits
likely aren't being enforced?

> my aim is that for threads that are doing M:N work the stats will 
> accumulate on the thread
> for a short while and then be collected to the KSEG when ther eis reason 
> to think that
> the kernel thread has changed purpose or exits (both of which happen a 
> lot in KSE).
> for 1:1 threads, they will continue to accumulate on the thread, since 
> no "KSE events" will
> occur.
> The KSEGRPs stats will be collected to the process when asked for.
> I will probably also change the way that 'ps' shows these (and threads). 
> I'm not sure what to do about top yet. we really need to be able to show a
> process name AND a thread name when the threads are shown and have names.
>> Kris

Does pthreads allow the programmer to name threads in a user and/or
kernel visible way?  Is this something that is really all that


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