On Thu, Aug 16, 2012 at 05:13:33PM -0400, Steven Rostedt wrote: > BTW, we already have a persistent buffering in the kernel. It's used > by ftrace. What about having perf use that buffering for persistent > events? Or is there some other issues about using it.
Not that I know of. I coded this with the perf ring buffer now. If only there was one ring buffer in the kernel.. /me ducks and hides. Ok, with perf I can read out the events programmatically by mmaping the per-CPU buffer with perf_mmap. How do you do that in ftrace? Any code pointers I can stare at? > I'm currently working on having perf read ftrace data, so in the near > future, I plan on having some RFC patches to have perf reading from > this buffer anyway. Are you saying the ftrace buffer would be mmappable too now? Btw, I wanted to hear your opinion on patch 1/4 since it touches ftrace/trace_events code. Can you please look at it and tell me if its ok? Thanks. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
