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brendangregg/gist:1453467

Created December 9, 2011 21:52
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libmicro mprot_tw128k testing
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gistfile1.txt
[root@smartos18 ~/utils/libMicro-0.4.1/bin]# ./mprotect -N "mprot_tw128k" -l 128k -I 2000 -w -t -f /dev/zero
prc thr usecs/call samples errors cnt/samp size flags
mprot_tw128k 1 1 1.63200 219 0 1 131072 --w-t
[root@smartos18 ~/utils/libMicro-0.4.1/bin]# ./mprotect -N "mprot_tw128k" -l 128k -I 2000 -w -t -f /dev/zero
prc thr usecs/call samples errors cnt/samp size flags
mprot_tw128k 1 1 67.25900 205 0 1 131072 --w-t
[root@smartos18 ~/utils/libMicro-0.4.1/bin]# ./mprotect -N "mprot_tw128k" -l 128k -I 2000 -w -t -f /dev/zero
prc thr usecs/call samples errors cnt/samp size flags
mprot_tw128k 1 1 106.88600 135 0 1 131072 --w-t
^^^^^^^^^ note variance
[root@smartos18 ~/utils/libMicro-0.4.1/bin]# time ./mprotect -N "mprot_tw128k" -l 128k -I 2000 -w -t -f /dev/zero
prc thr usecs/call samples errors cnt/samp size flags
mprot_tw128k 1 1 67.42600 215 0 1 131072 --w-t
real 0m0.042s
user 0m0.013s
sys 0m0.028s
^^^^^^^^ too quick
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