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Diffstat (limited to 'runtime/probes/bench/README')
| -rw-r--r-- | runtime/probes/bench/README | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/runtime/probes/bench/README b/runtime/probes/bench/README index 5eaded78..04801a74 100644 --- a/runtime/probes/bench/README +++ b/runtime/probes/bench/README @@ -1,15 +1,11 @@ This is a benchmark program for the SystemTap Runtime. -It works by instrumenting sys_read() and sys_write(). It calls each a million -times and times that. Then it puts an empty kprobe on one and jprobe on the -other and times that. Subtracting the difference between the two runs gives +It works by instrumenting sys_uid() and sys_gid(). It calls each a million +times and measures how long it takes. Then it puts an empty kprobe on one and jprobe on the +other and measures that. Subtracting the difference between the two runs gives the kprobe and jprobe overhead. The process is then repeated for more complicated probes. -Any system has some background activity going on that will generate sys_read -and sys_write calls. However, unless some major activity is going on, it -should be statistically insignificant. - To Start: 1. Build the test program. |