Antoine Pitrou <pit...@free.fr> added the comment: > The counter is "stall cycles". > During the 10 second run on my 2.4Ghz cpu, we had instruction cache > miss stalls for 2 billion cycles (2000 samples of 1000000 cycles per > sample). That does account for around 10% of the availible cpu.
Ok, thanks. > 2) The poor performance of competing CPU threads on multicore machines > is due to the instruction cache behaviour of non-overlapping thread > execution on different cores. Have you tried your measurement approach with ccbench? > We can fix 1) easily, even with a much less invasive patch than the > ones I have put in here. I'm a bit surprised at the apparent > disinterest in such an obvious bug / fix. As already said, it's too late for 2.7. And the fix in 3.2 is most probably better. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue8299> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
