Re: Performance analysis of Linux Kernel Markers 0.20 for 2.6.17

From: Nicholas Miell
Date: Sat Sep 30 2006 - 15:02:44 EST

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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