[Python-Dev] Fixing the GIL (with a BFS scheduler) (original) (raw)

Dj Gilcrease digitalxero at gmail.com
Tue May 18 22:26:19 CEST 2010

On Tue, May 18, 2010 at 3:43 PM, "Martin v. Löwis" <martin at v.loewis.de> wrote:

So please join us in considering the issue fixed unless you can provide a really world example that demonstrates the contrary.

The server software I maintain (openrpg) experiences this issue with when I tried porting the server code to 3.2. Granted it was only a 5 to 7% speed drop over single core, though with the old GIL (py2.5) there was a 25% to 30% speed drop (It can be running upto 300 IO bound threads & 30 CPU bound threads) so a net improvement of 20% so I am more than happy with the new GIL.

I think the new GIL should be given a year or so in the wild before you start trying to optimize theoretical issues you may run into. If in a year people come back and have some examples of where a proper scheduler would help improve speed on multi-core systems even more, then we can address the issue at that time.

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