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Number of threads shown in Windows Task Manager?
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 Number of threads shown in Windows Task Manager? - Apr. 2, '05, 6:45:25 PM
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yoldas
Posts: 5
Status: offline
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If I create a thread in a process and if I look at it with
ps axL | grep <process_name>
I see the number of threads for this process as 2, correctly.
Why does Windows Task Manager show 3 threads for that process?
Actually it is always showing one more (2 for 1, 3 for 2, etc.)
Thanks...
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RE: Number of threads shown in Windows Task Manager? - Apr. 3, '05, 12:26:10 AM
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Rodney
Posts: 3714
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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The extra thread is assigned for the delivery of signals to the process.
The signal delivery for Interix 3.5 is similar to the way it's done with Solaris.
(As a side note this is different from Interix 3.0 and earlier versions because
of the change to support Pthreads). The design of having this extra thread for the
signal delivery has to do with Pthreads and how things need to be handled and/or
reacted to correctly. If you are running a threaded Interix process you don't have
control over thread with the pthread API (you'd mess yourself up if you did).
So from the Interix space you see N threads listed because you have control at
maximum of over N threads. Win32 is reporting what the kernel is reporting (N+1)
because in the Win32 world signals are not part of the model.
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