python's thread problem on Linux platform

[devdoer at 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?