[PATCH 0/4] perf script: Add script per-event-dump support

From: yuzhoujian
Date: Mon Sep 18 2017 - 01:56:02 EST

Introduce a new option to print trace output to files named by the
monitored events and update perf-script documentation accordingly.

Shown below is output of perf script command with the newly introduced

$perf record -e cycles -e context-switches -ag -- sleep 10
$perf script --per-event-dump
$ls /
cycles.stacks context-switches.stacks

Without per-event-dump support, drawing flamegraphs for different events
is really hard. You can only monitor one event at a time for perf record.
Using this option, we can get the trace output files named by the monitored
events, and could draw flamegraphs according to the event's name.

yuzhoujian (4):
Add a new element for the struct perf_tool, and add the
--per-event-dump option for perf script
Makes all those related functions receive the FILE pointer
Add the fp_selection_helper function to set the file pointer for
the related functions
Replace printf with fprintf for all the output functions

tools/perf/builtin-script.c | 451 +++++++++++++++++++++++++-------------------
tools/perf/util/tool.h | 1 +
2 files changed, 253 insertions(+), 199 deletions(-)