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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
tenths=date\ +%s%1N
# Wait for PID $1 to have $2 number of threads started
# Time out after $3 tenths of a second or 5 seconds if $3 is ""
wait_for_threads()
{
tm_out=$3 ; [ -n "${tm_out}" ] || tm_out=50
start_time=$($tenths)
while [ -e "/proc/$1/task" ] ; do
th_cnt=$(find "/proc/$1/task" -mindepth 1 -maxdepth 1 -printf x | wc -c)
if [ "${th_cnt}" -ge "$2" ] ; then
return 0
fi
# Wait at most tm_out tenths of a second
if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then
echo "PID $1 does not have $2 threads"
return 1
fi
done
return 1
}
# Wait for perf record -vvv 2>$2 with PID $1 to start by looking at file $2
# It depends on capturing perf record debug message "perf record has started"
# Time out after $3 tenths of a second or 5 seconds if $3 is ""
wait_for_perf_to_start()
{
tm_out=$3 ; [ -n "${tm_out}" ] || tm_out=50
echo "Waiting for \"perf record has started\" message"
start_time=$($tenths)
while [ -e "/proc/$1" ] ; do
if grep -q "perf record has started" "$2" ; then
echo OK
break
fi
# Wait at most tm_out tenths of a second
if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then
echo "perf recording did not start"
return 1
fi
done
return 0
}
# Wait for process PID %1 to exit
# Time out after $2 tenths of a second or 5 seconds if $2 is ""
wait_for_process_to_exit()
{
tm_out=$2 ; [ -n "${tm_out}" ] || tm_out=50
start_time=$($tenths)
while [ -e "/proc/$1" ] ; do
# Wait at most tm_out tenths of a second
if [ $(($($tenths) - start_time)) -ge $tm_out ] ; then
echo "PID $1 did not exit as expected"
return 1
fi
done
return 0
}
# Check if PID $1 is still running after $2 tenths of a second
# or 0.3 seconds if $2 is ""
is_running()
{
tm_out=$2 ; [ -n "${tm_out}" ] || tm_out=3
start_time=$($tenths)
while [ -e "/proc/$1" ] ; do
# Check for at least tm_out tenths of a second
if [ $(($($tenths) - start_time)) -gt $tm_out ] ; then
return 0
fi
done
echo "PID $1 exited prematurely"
return 1
}
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