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Linux kernel mirror (for testing)
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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}