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ftrace: add support to report function profiling data

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Functions profiling data are reported in a set of files, one for each CPU.

This patch adds the required support to collect these data into a single
JSON formatted file. Data are collected using a shutils routing on the
target side and formatted in JSON on the host side.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This commit is contained in:
Patrick Bellasi
2016-01-26 15:38:44 +00:00
parent 7f5a150b4f
commit 082a82c7c5
2 changed files with 59 additions and 0 deletions
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15
devlib/bin/scripts/shutils.in
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@@ -43,6 +43,18 @@ cpufreq_trace_all_frequencies() {
done
}
################################################################################
# FTrace Utility Functions
################################################################################
ftrace_get_function_stats() {
for CPU in $(ls /sys/kernel/debug/tracing/trace_stat | sed 's/function//'); do
REPLACE_STRING="s/ Function/\n Function (CPU$CPU)/"
cat /sys/kernel/debug/tracing/trace_stat/function$CPU \
| sed "$REPLACE_STRING"
done
}
################################################################################
# Main Function Dispatcher
################################################################################
@@ -63,6 +75,9 @@ cpufreq_get_all_governors)
cpufreq_trace_all_frequencies)
cpufreq_trace_all_frequencies $*
;;
ftrace_get_function_stats)
ftrace_get_function_stats
;;
*)
echo "Command [$CMD] not supported"
exit -1