Hi, Insipired by Jason’s post [1] explaining how to interpret jemalloc’s size class stats and the resulting table, I threw together a quick script to essentially output the same information from an arbitrary malloc_stats_print output.
I figured this might be useful to others, so it’s at https://github.com/daverigby/scripts/blob/master/jemalloc_analyse.py Example output (*very* similar to Jason’s): —cut— === Stats for Arena 'merged' === small allocation stats: bin size (B) regions pages allocated (B) cur runs % of small % of blame per run per run utilization frag memory (B) 0 8 501 1 5032 3 42% 0% 6992 0% 1 16 252 1 24480 8 76% 0% 7776 0% 2 32 126 1 1428352 360 98% 9% 23168 1% 3 48 84 1 73152 37 49% 0% 76032 2% 4 64 63 1 892096 235 94% 6% 55424 2% 5 80 50 1 198560 54 92% 1% 17440 1% 6 96 84 2 274464 35 97% 2% 7776 0% 7 112 72 2 40320 7 71% 0% 16128 0% 8 128 63 2 157568 24 81% 1% 35968 1% 9 160 51 2 633760 79 98% 4% 10880 0% 10 192 63 3 136704 15 75% 1% 44736 1% 11 224 72 4 80416 9 55% 1% 64736 2% 12 256 63 4 153344 12 79% 1% 40192 1% 13 320 63 5 878720 47 93% 6% 68800 2% 14 384 63 6 133248 9 61% 1% 84480 2% 15 448 63 7 1523648 57 95% 10% 85120 2% 16 512 63 8 963072 38 79% 6% 262656 8% 17 640 51 8 188800 9 64% 1% 104960 3% 18 768 47 9 420864 13 90% 3% 48384 1% 19 896 45 10 1169280 32 91% 7% 120960 3% 20 1024 63 16 355328 9 61% 2% 225280 6% 21 1280 51 16 1602560 27 91% 10% 160000 5% 22 1536 42 16 456192 8 88% 3% 59904 2% 23 1792 38 17 225792 7 47% 1% 250880 7% 24 2048 65 33 1103872 11 75% 7% 360448 10% 25 2560 52 33 737280 10 55% 5% 593920 17% 26 3072 43 33 866304 8 82% 5% 190464 5% 27 3584 39 35 1075200 11 70% 7% 462336 13% total 15.1 MB 3.3 MB utilization = allocated / (size * regions_per_run * cur runs) % of small = allocated / total allocated frag memory = (size * regions_per_run * cur runs) - allocated % of blame = frag memory / total frag memory —cut— Thanks, Dave [1]: http://www.canonware.com/pipermail/jemalloc-discuss/2013-November/000675.html _______________________________________________ jemalloc-discuss mailing list [email protected] http://www.canonware.com/mailman/listinfo/jemalloc-discuss
