| 1 | |
| 2 | |
| 3 |
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| 4 | usage() {
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| 5 | echo Extract any RCU CPU stall warnings present in specified file.
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| 6 | echo Filter out clocksource lines. Note that preceding-lines excludes the
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| 7 | echo initial line of the stall warning but trailing-lines includes it.
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| 8 | echo
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| 9 | echo Usage: $(basename $0) dmesg-file [ preceding-lines [ trailing-lines ] ]
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| 10 | echo
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| 11 | echo Error: $1
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| 12 | }
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| 13 |
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| 14 | |
| 15 |
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| 16 | if test -f "$1" && test -r "$1"
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| 17 | then
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| 18 | :
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| 19 | else
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| 20 | usage "Console log file \"$1\" missing or unreadable."
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| 21 | exit 1
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| 22 | fi
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| 23 |
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| 24 | echo $1
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| 25 | preceding_lines="${2-3}"
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| 26 | trailing_lines="${3-10}"
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| 27 |
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| 28 | awk -v preceding_lines="$preceding_lines" -v trailing_lines="$trailing_lines" '
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| 29 | suffix <= 0 {
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| 30 | for (i = preceding_lines; i > 0; i--)
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| 31 | last[i] = last[i - 1];
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| 32 | last[0] = $0;
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| 33 | }
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| 34 |
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| 35 | suffix > 0 {
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| 36 | print $0;
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| 37 | suffix--;
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| 38 | if (suffix <= 0)
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| 39 | print "";
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| 40 | }
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| 41 |
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| 42 | suffix <= 0 && /detected stall/ {
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| 43 | for (i = preceding_lines; i >= 0; i--)
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| 44 | if (last[i] != "")
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| 45 | print last[i];
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| 46 | suffix = trailing_lines;
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| 47 | }' < "$1" | tr -d '\015' | grep -v clocksource
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| 48 |
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