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path: root/src/libsystemd-bus/test-bus-kernel-benchmark.c
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2013-06-05test-bus-kernel-benchmark: corrected output for memfd bisectHarald Hoyer
2013-06-05bus: benchmark - adjust printf and MAX_SIZEKay Sievers
2013-06-04bus-benchmark: add performance data output modeKay Sievers
- for now, comment out munmap() check to enable memfd passing - print tab-separated values and header - add memcpy() to fill the memfd, to produce real-world results $ ./test-bus-kernel-benchmark SIZE COPY MEMFD 4194304 370 370 2097152 810 810 1048576 2130 2130 524288 4090 4090 262144 7080 7080 131072 11380 11380 65536 17140 17140 98304 13930 13930 114688 12890 12890 122880 12350 12350 126976 12150 12150 129024 12170 12170 130048 12040 12040 130560 12080 12080 130816 12010 12010 130944 12020 12020 131008 12040 12040 131040 12050 12050 131056 12010 12010 131064 12060 12060 131068 12040 12040 131070 11310 11310 131069 11420 11420 Copying/memfd are equally fast at 131068 bytes $ ./test-bus-kernel-benchmark chart SIZE COPY MEMFD 1 35570 23690 2 36470 23680 4 36160 23520 8 36600 22220 16 33900 20830 32 33990 21360 64 33480 21280 128 34050 20910 256 32950 21750 512 34730 21900 1024 33810 22890 2048 36280 23110 4096 30790 21610 8192 29380 21100 16384 26880 19820 32768 22510 17980 65536 17270 15180 131072 11400 11420 262144 7140 8270 524288 4090 5050 1048576 2110 2780 2097152 800 1140 4194304 350 580
2013-06-04bus-benchmark: lower loop time to 100ms by default, to ensure "make check" ↵Lennart Poettering
finishes more quickly To get useful results you should however specify a much longer time on the command line.
2013-06-04test: determine number of transactions per second rather than time per ↵Lennart Poettering
transaction This way the measurements are not skewed by twoo short total measurement times, and results become stabler.
2013-05-29bus: rework benchmark test to actually yield useful resultsLennart Poettering
2013-05-22bus: add benchmark tool to determine the right threshold for copying vs. memfdLennart Poettering
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