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Date: Sat, 21 May 2016 14:01:51 +0200 From: Jiri Olsa <jolsa@...hat.com> To: Andi Kleen <andi@...stfloor.org> Cc: acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com> Subject: Re: [PATCH] perf, tools, report: Add srcline_from/to branch sort keys On Fri, May 20, 2016 at 01:15:08PM -0700, Andi Kleen wrote: > From: Andi Kleen <ak@...ux.intel.com> > > Add srcline_from and srcline_to branch sort keys that allow > to show the source lines of a branch. That makes it much easier > to track down where particular branches happen in the program, > for example to examine branch mispredictions, or to associate > it with cycle counts: > > % perf record -b -e cycles:p ./tcall > % perf report --sort srcline_from,srcline_to,mispredict > ... > 15.10% tcall.c:18 tcall.c:10 N > 14.83% tcall.c:11 tcall.c:5 N > 14.12% tcall.c:7 tcall.c:12 N > 14.04% tcall.c:12 tcall.c:5 N > 12.42% tcall.c:17 tcall.c:18 N > 12.39% tcall.c:7 tcall.c:13 N > 12.27% tcall.c:13 tcall.c:17 N > ... > > % perf report --sort srcline_from,srcline_to,cycles > ... > 17.12% tcall.c:18 tcall.c:11 1 > 17.01% tcall.c:12 tcall.c:6 1 > 16.98% tcall.c:11 tcall.c:6 1 > 15.91% tcall.c:17 tcall.c:18 1 > 6.38% tcall.c:7 tcall.c:17 7 > 4.80% tcall.c:7 tcall.c:12 8 > 4.21% tcall.c:7 tcall.c:17 8 > 2.67% tcall.c:7 tcall.c:12 7 > 2.62% tcall.c:7 tcall.c:12 10 > 2.10% tcall.c:7 tcall.c:17 9 > 1.58% tcall.c:7 tcall.c:12 6 > 1.44% tcall.c:7 tcall.c:12 5 > 1.38% tcall.c:7 tcall.c:12 9 > 1.06% tcall.c:7 tcall.c:17 13 > 1.05% tcall.c:7 tcall.c:12 4 > 1.01% tcall.c:7 tcall.c:17 6 > > Open issues: > - Some kernel symbols get misresolved. Acked-by: Jiri Olsa <jolsa@...nel.org> thanks, jirka
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