On Tue, Aug 19, 2014 at 02:51:31PM +0900, Namhyung Kim wrote: SNIP > IMHO, it's harder to find out the right info. Even if we might add > self/children tag to the callchains, I still think it'd be better just > to trim down irrelavant info from the output. > > After applying this patch, it'll only show the callees of the symbol and > I think this is what most users expect to see: > > + 99.98% 0.00% abc2 libc-2.17.so [.] __libc_start_main > - 79.75% 11.29% abc2 abc2 [.] main > - main > + 38.01% a > + 35.75% c > + 26.22% b > - 53.07% 52.99% abc2 abc2 [.] c > - c > + 100.00% apic_timer_interrupt > - 34.12% 28.75% abc2 abc2 [.] b > - b > 98.85% c > + 1.15% apic_timer_interrupt > - 30.56% 6.78% abc2 abc2 [.] a > - a > + 69.15% c > + 30.80% b > + 0.17% 0.01% abc2 [kernel.kallsyms] [k] apic_timer_interrupt > + 0.15% 0.00% abc2 [kernel.kallsyms] [k] > smp_apic_timer_interrupt > + 0.11% 0.00% abc2 [kernel.kallsyms] [k] hrtimer_interrupt > > > If you want to see the callers of 'c', you may go to above entries (main > and __libc_start_main in this case) and then follow the callchains. If > it's not enough, you can re-run perf report with -g callee option.
but only if you know who called them, like in this simple example IMHO this part of callchain is not confusing enough to be cut, for me it's usefull info for which I'd need to make more steps to get it anyway, this is from review point of view.. as a user I dont use '-g caller' often enough to actually care ;-) thanks, jirka -- 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/
