tools/perf/tests/shell/test_arm_callgraph_fp.sh

   1 #!/bin/sh
   2 # Check Arm64 callgraphs are complete in fp mode
   3 # SPDX-License-Identifier: GPL-2.0
   4
   5 shelldir=$(dirname "$0")
   6 # shellcheck source=lib/perf_has_symbol.sh
   7 . "${shelldir}"/lib/perf_has_symbol.sh
   8
   9 lscpu | grep -q "aarch64" || exit 2
  10
  11 skip_test_missing_symbol leafloop
  12
  13 PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
  14 TEST_PROGRAM="perf test -w leafloop"
  15
  16 cleanup_files()
  17 {
  18         rm -f "$PERF_DATA"
  19 }
  20
  21 trap cleanup_files EXIT TERM INT
  22
  23 # Add a 1 second delay to skip samples that are not in the leaf() function
  24 # shellcheck disable=SC2086
  25 perf record -o "$PERF_DATA" --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
  26 PID=$!
  27
  28 echo " + Recording (PID=$PID)..."
  29 sleep 2
  30 echo " + Stopping perf-record..."
  31
  32 kill $PID
  33 wait $PID
  34
  35 # expected perf-script output:
  36 #
  37 # program
  38 #       728 leaf
  39 #       753 parent
  40 #       76c leafloop
  41 # ...
  42
  43 perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4
  44 perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4 | \
  45         awk '{ if ($2 != "") sym[i++] = $2 } END { if (sym[0] != "leaf" ||
  46                                                        sym[1] != "parent" ||
  47                                                        sym[2] != "leafloop") exit 1 }'