tools/perf/tests/shell/ftrace.sh

   1 #!/bin/sh
   2 # perf ftrace tests
   3 # SPDX-License-Identifier: GPL-2.0
   4
   5 set -e
   6
   7 # perf ftrace commands only works for root
   8 if [ "$(id -u)" != 0 ]; then
   9     echo "perf ftrace test  [Skipped: no permission]"
  10     exit 2
  11 fi
  12
  13 output=$(mktemp /tmp/__perf_test.ftrace.XXXXXX)
  14
  15 cleanup() {
  16   rm -f "${output}"
  17
  18   trap - EXIT TERM INT
  19 }
  20
  21 trap_cleanup() {
  22   cleanup
  23   exit 1
  24 }
  25 trap trap_cleanup EXIT TERM INT
  26
  27 # this will be set in test_ftrace_trace()
  28 target_function=
  29
  30 test_ftrace_list() {
  31     echo "perf ftrace list test"
  32     perf ftrace -F > "${output}"
  33     # this will be used in test_ftrace_trace()
  34     sleep_functions=$(grep 'sys_.*sleep$' "${output}")
  35     echo "syscalls for sleep:"
  36     echo "${sleep_functions}"
  37     echo "perf ftrace list test  [Success]"
  38 }
  39
  40 test_ftrace_trace() {
  41     echo "perf ftrace trace test"
  42     perf ftrace trace --graph-opts depth=5 sleep 0.1 > "${output}"
  43     # it should have some function name contains 'sleep'
  44     grep "^#" "${output}"
  45     grep -F 'sleep()' "${output}"
  46     # find actual syscall function name
  47     for FN in ${sleep_functions}; do
  48         if grep -q "${FN}" "${output}"; then
  49             target_function="${FN}"
  50             echo "perf ftrace trace test  [Success]"
  51             return
  52         fi
  53     done
  54
  55     echo "perf ftrace trace test  [Failure: sleep syscall not found]"
  56     exit 1
  57 }
  58
  59 test_ftrace_latency() {
  60     echo "perf ftrace latency test"
  61     echo "target function: ${target_function}"
  62     perf ftrace latency -T "${target_function}" sleep 0.1 > "${output}"
  63     grep "^#" "${output}"
  64     grep "###" "${output}"
  65     echo "perf ftrace latency test  [Success]"
  66 }
  67
  68 test_ftrace_profile() {
  69     echo "perf ftrace profile test"
  70     perf ftrace profile -m 16M sleep 0.1 > "${output}"
  71     grep ^# "${output}"
  72     grep sleep "${output}"
  73     grep schedule "${output}"
  74     grep execve "${output}"
  75     time_re="[[:space:]]+1[[:digit:]]{5}\.[[:digit:]]{3}"
  76     # 100283.000 100283.000 100283.000          1   __x64_sys_clock_nanosleep
  77     # Check for one *clock_nanosleep line with a Count of just 1 that takes a bit more than 0.1 seconds
  78     # Strip the _x64_sys part to work with other architectures
  79     grep -E "^${time_re}${time_re}${time_re}[[:space:]]+1[[:space:]]+.*clock_nanosleep" "${output}"
  80     echo "perf ftrace profile test  [Success]"
  81 }
  82
  83 test_ftrace_list
  84 test_ftrace_trace
  85 test_ftrace_latency
  86 test_ftrace_profile
  87
  88 cleanup
  89 exit 0