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Date: Tue, 3 Nov 2015 21:52:07 +0900 From: Namhyung Kim <namhyung@...nel.org> To: Arnaldo Carvalho de Melo <acme@...nel.org> Cc: Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Jiri Olsa <jolsa@...hat.com>, LKML <linux-kernel@...r.kernel.org>, Brendan Gregg <brendan.d.gregg@...il.com>, David Ahern <dsahern@...il.com>, Frederic Weisbecker <fweisbec@...il.com>, Andi Kleen <andi@...stfloor.org>, Kan Liang <kan.liang@...el.com> Subject: [PATCHSET 0/4] perf report: Support folded callchain output (v4) Hello, This is what Brendan requested on the perf-users mailing list [1] to support FlameGraphs [2] more efficiently. This patchset adds a few more callchain options to adjust the output for it. * changes in v4) - add missing doc update - cleanup/fix callchain value print code - add Acked-by from Brendan and Jiri * changes in v3) - put the value before callchains - fix compile error At first, 'folded' output mode was added. The folded output puts the value, a space and all calchain nodes separated by semicolons. Now it only supports --stdio as other UI provides some way of folding and/or expanding callchains dynamically. The value is now can be one of 'percent', 'period', or 'count'. The percent is current default output and the period is the raw number of sample periods. The count is the number of samples for each callchain. Here's an example: $ perf report --no-children --show-nr-samples --stdio -g folded,count ... 39.93% 80 swapper [kernel.vmlinux] [k] intel_idel 57 intel_idle;cpuidle_enter_state;cpuidle_enter;call_cpuidle;cpu_startup_entry;start_secondary 23 intel_idle;cpuidle_enter_state;cpuidle_enter;call_cpuidle;cpu_startup_entry;rest_init;... $ perf report --no-children --stdio -g percent ... 39.93% swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--28.63%-- start_secondary | --11.30%-- rest_init $ perf report --no-children --stdio --show-total-period -g period ... 39.93% 13018705 swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--9334403-- start_secondary | --3684302-- rest_init $ perf report --no-children --stdio --show-nr-samples -g count ... 39.93% 80 swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--57-- start_secondary | --23-- rest_init You can get it from 'perf/callchain-fold-v4' branch on my tree: git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git Any comments are welcome, thanks Namhyung [1] http://www.spinics.net/lists/linux-perf-users/msg02498.html [2] http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html Namhyung Kim (4): perf report: Support folded callchain mode on --stdio perf callchain: Abstract callchain print function perf callchain: Add count fields to struct callchain_node perf report: Add callchain value option tools/perf/Documentation/perf-report.txt | 13 +++-- tools/perf/builtin-report.c | 4 +- tools/perf/ui/browsers/hists.c | 8 +-- tools/perf/ui/gtk/hists.c | 8 +-- tools/perf/ui/stdio/hist.c | 93 ++++++++++++++++++++++++++------ tools/perf/util/callchain.c | 87 +++++++++++++++++++++++++++++- tools/perf/util/callchain.h | 24 ++++++++- tools/perf/util/util.c | 3 +- 8 files changed, 205 insertions(+), 35 deletions(-) -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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