global interpreter lock

Bryan Olson fakeaddress at nowhere.org
Fri Sep 2 06:47:07 CEST 2005


Mike Meyer wrote:
 > Bryan Olson writes:
 >>With Python threads/queues how do I wait for two queues (or
 >>locks or semaphores) at one call? (I know some methods to
 >>accomplish the same effect, but they suck.)
 >
 > By "not as good as", I meant the model they provide isn't as managable
 > as the one provided by Queue/Threading. Like async I/O,
 > Queue/Threading provides a better model at the cost of
 > generality.

I can't tell why you think that.

 > Instead of making vague assertions, why don't you provide us
 > with facts?

Yeah, I'll keep doing that. You're the one proclaiming a 'model'
to be more manageable with no evidence.

 > I.e. - what are the things you think are obvious that turned
 > out not to be true? Name some software that implements sophisticated
 > services that we can go look out. And so on...

Thought we went over that. Look at the popular relational-
database engines. Implementing such a service with one line of
execution and async I/O is theoretically possible, but I've not
heard of anyone who has managed to do it. MySQL, PostgreSQL,
IBPhoenix, MaxDB, all have multiple simultaneous threads and/or
processes (as do the competitive commercial database engines,
though you can't look under the hood so easily).


-- 
--Bryan



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