Re: Performance analysis of Linux Kernel Markers 0.20 for 2.6.17

On Sat, 2006-09-30 at 14:01 -0400, Mathieu Desnoyers wrote:
Hi,

Following the huge discussion thread about tracing/static vs dynamic
instrumentation/markers, a consensus seems to emerge about the need for a
marker system in the Linux kernel. The main issues this mechanism addresses are:

- Identify code important to runtime data collection/analysis tools in tree so
that it follows the code changes naturally.
- Be visually appealing to kernel developers.
- Have a very low impact on the system performance.
- Integrate in the standard kernel infrastructure : use C and loadable modules.

The time has come for some performance measurements of the Linux Kernel Markers,
which follows. I attach a PDF with tables and charts which condense these
results.

Has anyone done any performance measurements with the "regular function
call replaced by a NOP" type of marker?

--
Nicholas Miell <nmiell@xxxxxxxxxxx>

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