Florin Papa added the comment: I ran perf to use calibration and there is no difference in stability compared to the unpatched version.
With patch: python perf.py -b json_dump_v2 -v --csv=out1.csv --affinity=2 ../cpython/python ../cpython/python INFO:root:Automatically selected timer: perf_counter [1/1] json_dump_v2... Calibrating INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 1 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 2 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 4 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 8 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 16 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 1 -l 32 --timer perf_counter` Calibrating => num_runs=10, num_loops=32 (0.50 sec < 0.87 sec) INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 10 -l 32 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 10 -l 32 --timer perf_counter` Report on Linux centos 3.10.0-229.7.2.el7.x86_64 #1 SMP Tue Jun 23 22:06:11 UTC 2015 x86_64 x86_64 Total CPU cores: 18 ### json_dump_v2 ### Min: 0.877497 -> 0.886482: 1.01x slower <---------- Avg: 0.878150 -> 0.888351: 1.01x slower Not significant Stddev: 0.00054 -> 0.00106: 1.9481x larger Without patch: python perf.py -b json_dump_v2 -v --csv=out1.csv --affinity=2 ../cpython/python ../cpython/python INFO:root:Automatically selected timer: perf_counter [1/1] json_dump_v2... INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 50 --timer perf_counter` INFO:root:Running `taskset --cpu-list 2 ../cpython/python performance/bm_json_v2.py -n 50 --timer perf_counter` Report on Linux centos 3.10.0-229.7.2.el7.x86_64 #1 SMP Tue Jun 23 22:06:11 UTC 2015 x86_64 x86_64 Total CPU cores: 18 ### json_dump_v2 ### Min: 2.755514 -> 2.764131: 1.00x slower <---------- (almost) same as above Avg: 2.766546 -> 2.775587: 1.00x slower Not significant Stddev: 0.00538 -> 0.00382: 1.4069x smaller ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26275> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
