Messages in this thread | | | Date | Wed, 17 Nov 2010 16:31:38 -0500 | From | Douglas Santos <> | Subject | Benchmarks of kernel tracing options 2 (ftrace, lttng and perf) |
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Hi all,
This is a response to a benchmark, submitted a few weeks ago, comparing kernel tracing options. http://lkml.org/lkml/2010/10/28/422
We followed the methodology described in the link bellow, but using the shellscripts posted there to reproduce autotest scripts. http://lkml.org/lkml/2010/10/28/261
We disabled the extra syscall tracing on lttng, for a fair comparison. http://lkml.org/lkml/2010/10/28/290
Average results with tracing "on":
lttng: 220 ns ftrace: 260 ns perf: 740 ns
E5405 system kernel 2.6.36
-lttng 0.239 + 0.19.2modules + sys_getuid tracepoint + sys_getuid probe + remove syscall_trace
-ftrace and perf + sys_getuid tracepoint
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