Antoine Pitrou wrote: > Sturla Molden <sturla <at> molden.no> writes: >> It does not crash the interpreter, but it seems it can deadlock. > > Kristján sent me a patch which I applied and is supposed to fix this. > Anyway, thanks for the numbers. The GIL does seem to fare a bit better (zero > latency with the Pi calculation in the background) than under Linux, although > it > may be caused by the limited resolution of time.time() under Windows. > > Regards > > Antoine.
You can use time.clock() instead to get <15ms resolution. Changing all instances of 'time.time' to 'time.clock' gives me this result: (2-core machine, python 2.6.2) $ py ccbench.py --- Throughput --- Pi calculation (Python) threads=1: 675 iterations/s. threads=2: 388 ( 57 %) threads=3: 374 ( 55 %) threads=4: 445 ( 65 %) regular expression (C) threads=1: 588 iterations/s. threads=2: 519 ( 88 %) threads=3: 511 ( 86 %) threads=4: 513 ( 87 %) bz2 compression (C) threads=1: 536 iterations/s. threads=2: 949 ( 176 %) threads=3: 900 ( 167 %) threads=4: 927 ( 172 %) --- Latency --- Background CPU task: Pi calculation (Python) CPU threads=0: 24727 ms. (std dev: 0 ms.) CPU threads=1: 27930 ms. (std dev: 0 ms.) CPU threads=2: 31029 ms. (std dev: 0 ms.) CPU threads=3: 34170 ms. (std dev: 0 ms.) CPU threads=4: 37292 ms. (std dev: 0 ms.) Background CPU task: regular expression (C) CPU threads=0: 40454 ms. (std dev: 0 ms.) CPU threads=1: 43674 ms. (std dev: 21 ms.) CPU threads=2: 47100 ms. (std dev: 165 ms.) CPU threads=3: 50441 ms. (std dev: 304 ms.) CPU threads=4: 53707 ms. (std dev: 377 ms.) Background CPU task: bz2 compression (C) CPU threads=0: 56138 ms. (std dev: 0 ms.) CPU threads=1: 59332 ms. (std dev: 0 ms.) CPU threads=2: 62436 ms. (std dev: 0 ms.) CPU threads=3: 66130 ms. (std dev: 0 ms.) CPU threads=4: 69859 ms. (std dev: 0 ms.) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
