On Thu, Feb 16, 2012 at 10:58 PM, Armin Rigo <ar...@tunes.org> wrote: > Hi all, > > An update for STM: today I managed to build a pypy using the new "stm > gc". It runs richards.py on tannit: > > in 1 thread: 2320 ms per iteration > in 2 threads: 1410 ms per iteration > in 4 threads: 785 ms per iteration > in 8 threads: 685 ms per iteration > > The small gap between 4 and 8 threads is due to tannit having only 4 > "real" cpus, each one hyperthreaded. The additional gain is thus > smaller than expected. > > For comparison, a "pypy --jit off" runs at 650ms per iteration. So > the single-threaded performance is already at only 3.6x worse, and > moreover there are still a few easy big-win optimizations. I will > confirm it in a few days, but I would say that this shows it's working > quite well. :-) > > At least, it's fun to see in "top" a single pypy process using 397% cpu :-) > > For people interested, it is in the "stm-gc" branch; at least > bba9b03f5e70 works. Linux-only for now: " translate.py -O1 --stm > targetpypystandalone --no-allworkingmodules --withmod-transaction > --withmod-select --withmod-_socket ". The modified version of > richards.py I use is in pypy/translator/stm/test/. > > > A bientôt, > > Armin. > _______________________________________________ > pypy-dev mailing list > pypy-dev@python.org > http://mail.python.org/mailman/listinfo/pypy-dev
Wow great work! Seems like a JIT can do a good job here as well with removing extra overheads. _______________________________________________ pypy-dev mailing list pypy-dev@python.org http://mail.python.org/mailman/listinfo/pypy-dev
