python's thread problem on Linux platform

[devdoer@gmail.com]

I found that multi-threaded program(io-centralize ) runs very slowly
on linux while the same program runs very quickly on windows.If I
change the thread number to one ,the program runs quickly on linux, in
fact the speed is quicker than the multi-threaded version .
It turns out that python's multi-thread support on linux has some
problems.Any comments?

[Irmen de Jong]

Re: python's thread problem on Linux platform

devdoer@gmail.c om wrote:[color=blue]
> I found that multi-threaded program(io-centralize ) runs very slowly
> on linux while the same program runs very quickly on windows.If I
> change the thread number to one ,the program runs quickly on linux, in
> fact the speed is quicker than the multi-threaded version .
> It turns out that python's multi-thread support on linux has some
> problems.Any comments?
>[/color]

Yes. There is a bug in your code.

--Irmen

[robert]

Re: python's thread problem on Linux platform

devdoer@gmail.c om wrote:
[color=blue]
> I found that multi-threaded program(io-centralize ) runs very slowly
> on linux while the same program runs very quickly on windows.If I
> change the thread number to one ,the program runs quickly on linux, in
> fact the speed is quicker than the multi-threaded version .
> It turns out that python's multi-thread support on linux has some
> problems.Any comments?
>[/color]

You are probably looping or have other quirks', over-lock-ing ...

Python's thread/threading/Queue stuff is unfortunately Java-ish/
OS-mindset and not functional. Thus encourages screwing "ego threads".

Maybe you get things organized frictionless with those 2? :

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491281

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/491280

-robert