pipe_test.sh (1393B)
1#!/bin/sh 2# perf pipe recording and injection test 3# SPDX-License-Identifier: GPL-2.0 4 5# skip if there's no compiler 6if ! [ -x "$(command -v cc)" ]; then 7 echo "failed: no compiler, install gcc" 8 exit 2 9fi 10 11file=$(mktemp /tmp/test.file.XXXXXX) 12data=$(mktemp /tmp/perf.data.XXXXXX) 13 14cat <<EOF | cc -o ${file} -x c - 15#include <signal.h> 16#include <stdlib.h> 17#include <unistd.h> 18 19volatile int done; 20 21void sigalrm(int sig) { 22 done = 1; 23} 24 25__attribute__((noinline)) void noploop(void) { 26 while (!done) 27 continue; 28} 29 30int main(int argc, char *argv[]) { 31 int sec = 1; 32 33 if (argc > 1) 34 sec = atoi(argv[1]); 35 36 signal(SIGALRM, sigalrm); 37 alarm(sec); 38 39 noploop(); 40 return 0; 41} 42EOF 43 44 45if ! perf record -e task-clock:u -o - ${file} | perf report -i - --task | grep test.file; then 46 echo "cannot find the test file in the perf report" 47 exit 1 48fi 49 50if ! perf record -e task-clock:u -o - ${file} | perf inject -b | perf report -i - | grep noploop; then 51 echo "cannot find noploop function in pipe #1" 52 exit 1 53fi 54 55perf record -e task-clock:u -o - ${file} | perf inject -b -o ${data} 56if ! perf report -i ${data} | grep noploop; then 57 echo "cannot find noploop function in pipe #2" 58 exit 1 59fi 60 61perf record -e task-clock:u -o ${data} ${file} 62if ! perf inject -b -i ${data} | perf report -i - | grep noploop; then 63 echo "cannot find noploop function in pipe #3" 64 exit 1 65fi 66 67 68rm -f ${file} ${data} ${data}.old 69exit 0