On 2019年6月17日 13:44:29 -0500 Tim Peters <[email protected]> wrote: > > To illustrate, I reverted that change in my PR and ran exactly same > thing. Wow - _then_ the 1M-arena-16K-pool PR reclaimed 1135(!) arenas > instead of none. Almost all worse than uselessly. The only one that > "paid" was the last: the run ended with 3361 arenas still in use > instead of 3362. Because with the change, one entirely empty arena > remained on the usable_arenas list. > > So, word to the wise: when looking at _debugmallocstats() output, like: > > # arenas allocated total = 4,496 > # arenas reclaimed = 1,135 > # arenas highwater mark = 3,362 > # arenas allocated current = 3,361 > 3361 arenas * 1048576 bytes/arena = 3,524,263,936 > > the number "reclaimed" isn't really telling us much: before 3.9, it > may be telling us only how many times obmalloc wasted time on useless > arena thrashing.
That's a very nice improvement :-) Regards Antoine. _______________________________________________ Python-Dev mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/[email protected]/message/BS4XUDVOVTB7CECA6UHWWXCUFECGAWAV/