1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3
4 tenths=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 ""
8 wait_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 ""
29 wait_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 ""
50 wait_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 ""
66 is_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 }
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