Commit 3d020f2e authored by James Clark's avatar James Clark Committed by Arnaldo Carvalho de Melo
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perf cs-etm: Test sparse CPU maps 



We only currently test with default (all CPUs) or --per-thread mode.

Different permutations of the "-C" option can affect decoding so add
tests for some of them.

Signed-off-by: default avatarJames Clark <james.clark@linaro.org>
Tested-by: default avatarLeo Yan <leo.yan@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a70493e2

tools/perf/tests/shell/test_arm_coresight.sh

+54 −0
Original line number Diff line number Diff line
@@ -198,6 +198,58 @@ arm_cs_etm_basic_test() { 
	arm_cs_report "CoreSight basic testing with '$*'" $err

}



arm_cs_etm_test_cpu_list() {

	echo "Testing sparse CPU list: $1"

	perf record -o ${perfdata} -e cs_etm//u -C $1 \

		-- taskset --cpu-list $1 true > /dev/null 2>&1

	perf_script_branch_samples true

	err=$?

	arm_cs_report "CoreSight sparse CPUs with '$*'" $err

}



arm_cs_etm_sparse_cpus_test() {

	# Iterate for every ETM device

	cpus=()

	for dev in /sys/bus/event_source/devices/cs_etm/cpu*; do

		# Canonicalize the path

		dev=`readlink -f $dev`



		# Find the ETM device belonging to which CPU

		cpus+=("$(cat $dev/cpu)")

	done



	mapfile -t cpus < <(printf '%s\n' "${cpus[@]}" | sort -n)

	total=${#cpus[@]}



	# Need more than 1 to test

	if [ $total -le 1 ]; then

		return 0

	fi



	half=$((total / 2))



	# First half

	first_half=$(IFS=,; echo "${cpus[*]:0:$half}")

	arm_cs_etm_test_cpu_list $first_half



	# Second half

	second_half=$(IFS=,; echo "${cpus[*]:$half}")

	arm_cs_etm_test_cpu_list $second_half



	# Odd list is the same as halves unless >= 4 CPUs

	if [ $total -lt 4 ]; then

		return 0

	fi



	# Odd indices

	odd_cpus=()

	for ((i=1; i<total; i+=2)); do

		odd_cpus+=("${cpus[$i]}")

	done

	odd_list=$(IFS=,; echo "${odd_cpus[*]}")

	arm_cs_etm_test_cpu_list $odd_list

}



arm_cs_etm_traverse_path_test

arm_cs_etm_system_wide_test

arm_cs_etm_snapshot_test
@@ -211,4 +263,6 @@ arm_cs_etm_basic_test -e cs_etm/timestamp=1/ -a 
arm_cs_etm_basic_test -e cs_etm/timestamp=0/

arm_cs_etm_basic_test -e cs_etm/timestamp=1/



arm_cs_etm_sparse_cpus_test



exit $glb_err