On Mon, Jun 03, 2013 at 09:41:21PM +0200, Frederic Weisbecker wrote: > On Mon, Jun 03, 2013 at 02:22:23PM +0200, Ingo Molnar wrote: > > > > * Alexander Gordeev <[email protected]> wrote:
SNIP > How about we define finegrained context on top of perf events themselves? > Like we could tell perf to count a task's instructions only after > tracepoint:irq_entry is hit and stop counting when tracepoint:irq_exit. > > This way we can define any kind of fine grained context, not just irqs. We > are not short on tracepoints, software events, breakpoints, kprobes, uprobes > to play Legos there. agreed, we could do the same as Alex did plus we'd have the generic interface to meassure any place > > I had a branch with a working draft of that: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > perf/custom-ctx-v2-pre > > Frederic Weisbecker (5): > perf: Starter and stopper events > perf: New enable_on_starter attribute > perf: Support for starter and stopper in tools > perf: New --enable-on-starter option > perf: Add TODOs for event defined context > > It needs quite some improvements, (some are listed in the TODO on the last > commit) > especially in both the kernel and user interfaces. > > Jiri had some nice ideas about it. yep, one of them is to to get back to this soon ;-) jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
