1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3 4tenths=date\ +%s%1N 5 6# Wait for PID $1 to have $2 number of threads started 7# Time out after $3 tenths of a second or 5 seconds if $3 is "" 8wait_for_threads() 9{ 10 tm_out=$3 ; [ -n "${tm_out}" ] || tm_out=50 11 start_time=$($tenths) 12 while [ -e "/proc/$1/task" ] ; do 13 th_cnt=$(find "/proc/$1/task" -mindepth 1 -maxdepth 1 -printf x | wc -c) 14 if [ "${th_cnt}" -ge "$2" ] ; then 15 return 0 16 fi 17 # Wait at most tm_out tenths of a second 18 if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then 19 echo "PID $1 does not have $2 threads" 20 return 1 21 fi 22 done 23 return 1 24} 25 26# Wait for perf record -vvv 2>$2 with PID $1 to start by looking at file $2 27# It depends on capturing perf record debug message "perf record has started" 28# Time out after $3 tenths of a second or 5 seconds if $3 is "" 29wait_for_perf_to_start() 30{ 31 tm_out=$3 ; [ -n "${tm_out}" ] || tm_out=50 32 echo "Waiting for \"perf record has started\" message" 33 start_time=$($tenths) 34 while [ -e "/proc/$1" ] ; do 35 if grep -q "perf record has started" "$2" ; then 36 echo OK 37 break 38 fi 39 # Wait at most tm_out tenths of a second 40 if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then 41 echo "perf recording did not start" 42 return 1 43 fi 44 done 45 return 0 46} 47 48# Wait for process PID %1 to exit 49# Time out after $2 tenths of a second or 5 seconds if $2 is "" 50wait_for_process_to_exit() 51{ 52 tm_out=$2 ; [ -n "${tm_out}" ] || tm_out=50 53 start_time=$($tenths) 54 while [ -e "/proc/$1" ] ; do 55 # Wait at most tm_out tenths of a second 56 if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then 57 echo "PID $1 did not exit as expected" 58 return 1 59 fi 60 done 61 return 0 62} 63 64# Check if PID $1 is still running after $2 tenths of a second 65# or 0.3 seconds if $2 is "" 66is_running() 67{ 68 tm_out=$2 ; [ -n "${tm_out}" ] || tm_out=3 69 start_time=$($tenths) 70 while [ -e "/proc/$1" ] ; do 71 # Check for at least tm_out tenths of a second 72 if [ $(($($tenths) - start_time)) -gt $tm_out ] ; then 73 return 0 74 fi 75 done 76 echo "PID $1 exited prematurely" 77 return 1 78} 79