On 02/15/2011 10:53 AM, Julien Desfossez wrote:
> LTTng-UST vs SystemTap userspace tracing benchmarks
>
> February 15th, 2011
>
> Authors: Mathieu Desnoyers <[email protected]>
> Julien Desfossez <[email protected]>
> * SystemTap probe (stap testutrace.stp -F) :
> probe process("./.libs/tracepoint_benchmark").mark("single_trace") {
> printf("%d : %s\n", gettimeofday_ns(), $arg1);
> }
Hi Julien,
How much of the SystemTap overhead is due to the printf() statement in the
probe? What is the run time for the following:
probe process("./.libs/tracepoint_benchmark").mark("single_trace") {}
Is the code for the benchmarks available, so we can take a look at reducing the
overhead of SystemTap?
-Will
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