Python Multithreading (not all threads progress) - 


-- launch 10 threads -- threads share queue.queue(). -- each thread gets item queue      -- each thread communicates first external webserver     -- processes data coming ext. webserver     -- communicates internal db     -- gets next item queue     -- repeats until queue finishes     -- @ point threads joined , main thread exits      -- in code, in main thread populate queue.queue() 500 items     -- each thread gets first item in queue.

i observe that:

-- (that means when each thread processing first item) 10 threads starts , proceeds -- however, second item onwards, 2 10 threads progress. -- since there multiple network, i/o operations involved, assume threads should interleave , cpu time.

could please explain behavior? pointers documentation or asked question on stack helpful.

sysctl hw.ncpu (mac os) hw.ncpu: 2

regards,


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