Commit d9bd1d42 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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perf test bpf-counters: Add test for BPF event modifier 



Refactor test to better enable sharing of logic, to give an idea of
progress and introduce test functions. Add test of measuring both
cycles and cycles:b simultaneously.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Song Liu <song@kernel.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416170014.985191-2-irogers@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent eb4d27cf

tools/perf/tests/shell/stat_bpf_counters.sh

+52 −23
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 


set -e



workload="perf bench sched messaging -g 1 -l 100 -t"



# check whether $2 is within +/- 20% of $1

compare_number()

{
@@ -21,25 +23,52 @@ compare_number() 
	fi

}



# skip if --bpf-counters is not supported

if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then

	if [ "$1" = "-v" ]; then

		echo "Skipping: --bpf-counters not supported"

		perf --no-pager stat -e cycles --bpf-counters true || true

	fi

	exit 2

fi

check_counts()

{

	base_cycles=$1

	bpf_cycles=$2



base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')

	if [ "$base_cycles" = "<not" ]; then

		echo "Skipping: cycles event not counted"

		exit 2

	fi

bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')

	if [ "$bpf_cycles" = "<not" ]; then

		echo "Failed: cycles not counted with --bpf-counters"

		exit 1

	fi

}



test_bpf_counters()

{

	printf "Testing --bpf-counters "

	base_cycles=$(perf stat --no-big-num -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}')

	bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- $workload  2>&1 | awk '/cycles/ {print $1}')

	check_counts $base_cycles $bpf_cycles

	compare_number $base_cycles $bpf_cycles

	echo "[Success]"

}



test_bpf_modifier()

{

	printf "Testing bpf event modifier "

	stat_output=$(perf stat --no-big-num -e cycles/name=base_cycles/,cycles/name=bpf_cycles/b -- $workload 2>&1)

	base_cycles=$(echo "$stat_output"| awk '/base_cycles/ {print $1}')

	bpf_cycles=$(echo "$stat_output"| awk '/bpf_cycles/ {print $1}')

	check_counts $base_cycles $bpf_cycles

	compare_number $base_cycles $bpf_cycles

	echo "[Success]"

}



# skip if --bpf-counters is not supported

if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then

	if [ "$1" = "-v" ]; then

		echo "Skipping: --bpf-counters not supported"

		perf --no-pager stat -e cycles --bpf-counters true || true

	fi

	exit 2

fi



test_bpf_counters

test_bpf_modifier



exit 0