On Wed, 21 Jul 2010 14:17:23 +0900, Bruno Randolf <b...@einfach.org> wrote: > but that's for all tracepoints all over the kernel... i think it's natural > that this takes some CPU time. note that on these boards even the 22Mbps are > limited by the CPU processing power. > The key word here is some. The numbers that you pointed out suggest that the effect here is quite large. I find it hard to believe that something isn't going wrong here. A single branch instruction really shouldn't be this onerous unless it's in a fast path, in which case it should probably be a compile-time option. What is the difference in image size between kernels with and without tracing?
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