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SystemTap BENCH2 Wed Mar 15 01:00:52 PST 2006
kernel: 2.6.9-34.ELsmp x86_64
Red Hat Enterprise Linux WS release 4 (Nahant Update 3)
tiger: 01:00:52 up 51 min, 1 user, load average: 1.46, 1.29, 0.87
processors: 4 (2 physical) Intel(R) Xeon(TM) CPU 2.80GHz
MemTotal: 1025428 kB MemFree: 750220 kB
----------------------------------------------------------------
For comparison, function call overhead is 721 nsecs.
Times below are nanoseconds per probe and include kprobe overhead.
----------------------------------------------------------------
+--- S = Script, R = Runtime
|+-- * = Relayfs Threads
|| NAME 1 2 4
R : empty probe 1471 737 559
S : empty probe 1556 784 594
S : printf 100 chars 2178 1445 1148
S*: printf 100 chars 2184 1290 1108
R : printf 100 chars 2064 1333 1039
R : printf 5 integers 3793 2006 1589
S : printf 5 integers 3930 2136 1644
SystemTap BENCH2 Wed Mar 15 01:20:41 PST 2006
kernel: 2.6.15-1.1830_FC4.huntsmp i686
Fedora Core release 4 (Stentz)
dragon: 01:20:41 up 17:06, 8 users, load average: 0.01, 0.01, 0.00
processors: 2 (1 physical) Intel(R) Pentium(R) 4 CPU 2.60GHz
MemTotal: 2067716 kB MemFree: 1524232 kB
----------------------------------------------------------------
For comparison, function call overhead is 812 nsecs.
Times below are nanoseconds per probe and include kprobe overhead.
----------------------------------------------------------------
+--- S = Script, R = Runtime
|+-- * = Relayfs Threads
|| NAME 1 2
R : empty probe 1172 884
S : empty probe 1345 1117
S : printf 100 chars 2515 2522
S*: printf 100 chars 1996 1834
R : printf 100 chars 2896 2735
R : printf 5 integers 4919 4316
S : printf 5 integers 5094 4501
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