Unix Programming - t1 for task-1; t2 for task-2; Non-MT process takes t1+t2; Will MT process take max of

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t1 for task-1; t2 for task-2; Non-MT process takes t1+t2; Will MT process take max of

qazmlp1209@rediffmail.com

2006-08-25, 4:00 am

Assume the processing-1 takes 10 ms and processing-2 takes 10 ms.
Processing-1 and processing-2 can be done independantly.
If I have a process with only a main thread, it takes 20 ms to finish
the processing-1 and processing-2 in sequence. Now, I want to switch it
to a multithreaded process, where the thread-1(i.e. the main thread)
will do the processing-1 and thread-2 will perform the processing-2.
How much time now the process is expected to take?
Will it be 10 ms, or slightly more than in the range of 11-19
ms(considering the time required for context-switching between
threads)?

I understand that this depends on various factors like the number of
CPUs etc.. But, I would like to know the typical time that we can
expect.

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