As promised, the I-pipe tracer has been ported to ppc. People working on this architecture are invited to give it a try, it's a great tool to find out where the cycles are actually going.


Just apply the tracer patch on top of the Adeos patch bearing the same revision number, and select the feature from the kernel configuration. If you happen to have some issue while booting the instrumented kernel on embedded setups (e.g. freeze after kernel decompression), try reducing the size of the trace log (CONFIG_IPIPE_TRACE_SHIFT).

http://download.gna.org/adeos/patches/v2.6/ppc/tracer/

--

Philippe.

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