1 #!/bin/sh 1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0+ 2 # SPDX-License-Identifier: GPL-2.0+
3 !! 3 #
4 usage() { !! 4 # Extract any RCU CPU stall warnings present in specified file.
5 echo Extract any RCU CPU stall warning !! 5 # Filter out clocksource lines. Note that preceding-lines excludes the
6 echo Filter out clocksource lines. No !! 6 # initial line of the stall warning but trailing-lines includes it.
7 echo initial line of the stall warning !! 7 #
8 echo !! 8 # Usage: extract-stall.sh dmesg-file [ preceding-lines [ trailing-lines ] ]
9 echo Usage: $(basename $0) dmesg-file <<
10 echo <<
11 echo Error: $1 <<
12 } <<
13 <<
14 # Terminate the script, if the argument is mis <<
15 <<
16 if test -f "$1" && test -r "$1" <<
17 then <<
18 : <<
19 else <<
20 usage "Console log file \"$1\" missing <<
21 exit 1 <<
22 fi <<
23 9
24 echo $1 10 echo $1
25 preceding_lines="${2-3}" 11 preceding_lines="${2-3}"
26 trailing_lines="${3-10}" 12 trailing_lines="${3-10}"
27 13
28 awk -v preceding_lines="$preceding_lines" -v t 14 awk -v preceding_lines="$preceding_lines" -v trailing_lines="$trailing_lines" '
29 suffix <= 0 { 15 suffix <= 0 {
30 for (i = preceding_lines; i > 0; i--) 16 for (i = preceding_lines; i > 0; i--)
31 last[i] = last[i - 1]; 17 last[i] = last[i - 1];
32 last[0] = $0; 18 last[0] = $0;
33 } 19 }
34 20
35 suffix > 0 { 21 suffix > 0 {
36 print $0; 22 print $0;
37 suffix--; 23 suffix--;
38 if (suffix <= 0) 24 if (suffix <= 0)
39 print ""; 25 print "";
40 } 26 }
41 27
42 suffix <= 0 && /detected stall/ { 28 suffix <= 0 && /detected stall/ {
43 for (i = preceding_lines; i >= 0; i--) 29 for (i = preceding_lines; i >= 0; i--)
44 if (last[i] != "") 30 if (last[i] != "")
45 print last[i]; 31 print last[i];
46 suffix = trailing_lines; 32 suffix = trailing_lines;
47 }' < "$1" | tr -d '\015' | grep -v clocksource 33 }' < "$1" | tr -d '\015' | grep -v clocksource
48 34
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