Messages in this thread | | | Subject | Re: [PATCH v2 0/5] perf report: Show inline stack | From | "Jin, Yao" <> | Date | Wed, 7 Dec 2016 13:38:29 +0800 |
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So sorry, please ignore this v2 patch series.
I missed the Arnaldo other comments which were added in the code.
I will RESEND v2 patch series later.
On 12/7/2016 9:30 PM, Jin Yao wrote: > v2: Thanks so much for Arnaldo's comments! > The modifications are: > > 1. Divide v1 patch "perf report: Find the inline stack for a > given address" into 2 patches: > a. perf report: Refactor common code in srcline.c > b. perf report: Find the inline stack for a given address > > Some function names are changed: > dso_name_get -> dso__name > ilist_apend -> inline_list__append > get_inline_node -> inline__node > free_inline_node -> inline_node__free > > 2. Since the function name are changed, update following patches > accordingly. > a. perf report: Show inline stack in stdio mode > b. perf report: Show inline stack in browser mode > > 3. Rebase to latest perf/core branch. This patch is impacted. > a. perf report: Create a new option "--inline" > > v1: Initial post > > It would be useful for perf to support a mode to query the > inline stack for callgraph addresses. This would simplify > finding the right code in code that does a lot of inlining. > > For example, the c code: > > static inline void f3(void) > { > int i; > for (i = 0; i < 1000;) { > > if(i%2) > i++; > else > i++; > } > printf("hello f3\n"); /* D */ > } > > /* < CALLCHAIN: f2 <- f1 > */ > static inline void f2(void) > { > int i; > for (i = 0; i < 100; i++) { > f3(); /* C */ > } > } > > /* < CALLCHAIN: f1 <- main > */ > static inline void f1(void) > { > int i; > for (i = 0; i < 100; i++) { > f2(); /* B */ > } > } > > /* < CALLCHAIN: main <- TOP > */ > int main() > { > struct timeval tv; > time_t start, end; > > gettimeofday(&tv, NULL); > start = end = tv.tv_sec; > while((end - start) < 5) { > f1(); /* A */ > gettimeofday(&tv, NULL); > end = tv.tv_sec; > } > return 0; > } > > The printed inline stack is: > > 0.05% test2 test2 [.] main > | > ---/home/perf-dev/lck-2867/test/test2.c:27 (inline) > /home/perf-dev/lck-2867/test/test2.c:35 (inline) > /home/perf-dev/lck-2867/test/test2.c:45 (inline) > /home/perf-dev/lck-2867/test/test2.c:61 (inline) > > I tag A/B/C/D in above c code to indicate the source line, > actually the inline stack is equal to: > > 0.05% test2 test2 [.] main > | > ---D > C > B > A > > Jin Yao (5): > perf report: Refactor common code in srcline.c > perf report: Find the inline stack for a given address > perf report: Create a new option "--inline" > perf report: Show inline stack in stdio mode > perf report: Show inline stack in browser mode > > tools/perf/Documentation/perf-report.txt | 4 + > tools/perf/builtin-report.c | 2 + > tools/perf/ui/browsers/hists.c | 98 ++++++++++++++- > tools/perf/ui/stdio/hist.c | 56 ++++++++- > tools/perf/util/hist.c | 5 + > tools/perf/util/sort.h | 1 + > tools/perf/util/srcline.c | 207 ++++++++++++++++++++++++++----- > tools/perf/util/symbol.h | 3 +- > tools/perf/util/util.h | 14 +++ > 9 files changed, 356 insertions(+), 34 deletions(-) >
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