On 08/01/08 12:06 -0500, Bernardo Innocenti wrote: > (cc CP, aleph) > > David Woodhouse wrote: > >>> 1. Did anybody profile the kernel while reading files? Last thing I red >>> on this list is that the profiler does not work on the XO in kernel mode. >>> Did anybody fix that >> I believe that standard kernel profiling (on timer ticks) has always >> worked, and even continues to work even though we use a tickless kernel >> now. I think oprofile also works. > > oprofile works, but for some reason it cannot generate > call graphs. > > It vaguely remember that the problem was that on the Geode we > were using sw timers rather than NMI as a timing source.
Right - but that should only prevent us from benchmarking within interrupts in the kernel - it shouldn't have any effect on our userland benchmarking. I'm no oprofile expert (I couldn't get it working at all when I tried it the other day), but do you have the debug version of libc loaded too? Maybe it can't find the symbols. Jordan -- Jordan Crouse Systems Software Development Engineer Advanced Micro Devices, Inc. _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel