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Timing comparisons for multi-kprobe feature
- From: Ananth N Mavinakayanahalli <amavin at redhat dot com>
- To: SystemTAP <systemtap at sources dot redhat dot com>
- Date: Mon, 18 Apr 2005 13:33:12 -0400
- Subject: Timing comparisons for multi-kprobe feature
Hi,
Here is the result of the tests I carried out to determine the cost
of the multiple-kprobes feature. All tests were carried out on a
uni PIII running at 732MHz.
I used Will's timing_kprobe and kprobe_multi modules on linux-2.6.12-rc2
for the tests.
(All values in microseconds)
Vanilla Single Multiple
(2.6.12-rc2) Interface Interfaces
------------------------------------------------------------
kprobe 1.124 1.149 1.149
jprobe 1.891 1.885 1.885
kprobe_multi NA 1.306 1.387
Note:
- Single Interface => linux-2.6.12-rc2 + take3 patch
- Multiple Interfaces => linux-2.6.12-rc2 + take4 patch
- kprobe_multi => averaged values with Will's kprobe_multi testcase
Thanks,
Ananth