#!/bin/sh # perf record tests # SPDX-License-Identifier: GPL-2.0 set -e shelldir=$(dirname "$0") . "${shelldir}"/lib/waiting.sh err=0 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) testprog=$(mktemp /tmp/__perf_test.prog.XXXXXX) testsym="test_loop" cleanup() { rm -rf "${perfdata}" rm -rf "${perfdata}".old if [ "${testprog}" != "true" ]; then rm -f "${testprog}" fi trap - EXIT TERM INT } trap_cleanup() { cleanup exit 1 } trap trap_cleanup EXIT TERM INT build_test_program() { if ! [ -x "$(command -v cc)" ]; then # No CC found. Fall back to 'true' testprog=true testsym=true return fi echo "Build a test program" cat <<EOF | cc -o ${testprog} -xc - -pthread #include <stdio.h> #include <stdlib.h> #include <pthread.h> void test_loop(void) { volatile int count = 1000000; while (count--) continue; } void *thfunc(void *arg) { int forever = *(int *)arg; do { test_loop(); } while (forever); return NULL; } int main(int argc, char *argv[]) { pthread_t th; int forever = 0; if (argc > 1) forever = atoi(argv[1]); pthread_create(&th, NULL, thfunc, &forever); test_loop(); pthread_join(th, NULL); return 0; } EOF } test_per_thread() { echo "Basic --per-thread mode test" if ! perf record -o /dev/null --quiet ${testprog} 2> /dev/null then echo "Per-thread record [Skipped event not supported]" return fi if ! perf record --per-thread -o "${perfdata}" ${testprog} 2> /dev/null then echo "Per-thread record [Failed record]" err=1 return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "Per-thread record [Failed missing output]" err=1 return fi # run the test program in background (forever) ${testprog} 1 & TESTPID=$! rm -f "${perfdata}" wait_for_threads ${TESTPID} 2 perf record -p "${TESTPID}" --per-thread -o "${perfdata}" sleep 1 2> /dev/null kill ${TESTPID} if [ ! -e "${perfdata}" ] then echo "Per-thread record [Failed record -p]" err=1 return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "Per-thread record [Failed -p missing output]" err=1 return fi echo "Basic --per-thread mode test [Success]" } test_register_capture() { echo "Register capture test" if ! perf list | grep -q 'br_inst_retired.near_call' then echo "Register capture test [Skipped missing event]" return fi if ! perf record --intr-regs=\? 2>&1 | grep -q 'available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15' then echo "Register capture test [Skipped missing registers]" return fi if ! perf record -o - --intr-regs=di,r8,dx,cx -e br_inst_retired.near_call:p \ -c 1000 --per-thread ${testprog} 2> /dev/null \ | perf script -F ip,sym,iregs -i - 2> /dev/null \ | grep -q "DI:" then echo "Register capture test [Failed missing output]" err=1 return fi echo "Register capture test [Success]" } test_system_wide() { echo "Basic --system-wide mode test" if ! perf record -aB --synth=no -o "${perfdata}" ${testprog} 2> /dev/null then echo "System-wide record [Skipped not supported]" return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "System-wide record [Failed missing output]" err=1 return fi if ! perf record -aB --synth=no -e cpu-clock,cs --threads=cpu \ -o "${perfdata}" ${testprog} 2> /dev/null then echo "System-wide record [Failed record --threads option]" err=1 return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "System-wide record [Failed --threads missing output]" err=1 return fi echo "Basic --system-wide mode test [Success]" } test_workload() { echo "Basic target workload test" if ! perf record -o "${perfdata}" ${testprog} 2> /dev/null then echo "Workload record [Failed record]" err=1 return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "Workload record [Failed missing output]" err=1 return fi if ! perf record -e cpu-clock,cs --threads=package \ -o "${perfdata}" ${testprog} 2> /dev/null then echo "Workload record [Failed record --threads option]" err=1 return fi if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "Workload record [Failed --threads missing output]" err=1 return fi echo "Basic target workload test [Success]" } build_test_program test_per_thread test_register_capture test_system_wide test_workload cleanup exit $err