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