35 lines
821 B
Bash
35 lines
821 B
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Extract any RCU CPU stall warnings present in specified file.
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# Filter out clocksource lines. Note that preceding-lines excludes the
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# initial line of the stall warning but trailing-lines includes it.
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#
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# Usage: extract-stall.sh dmesg-file [ preceding-lines [ trailing-lines ] ]
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echo $1
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preceding_lines="${2-3}"
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trailing_lines="${3-10}"
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awk -v preceding_lines="$preceding_lines" -v trailing_lines="$trailing_lines" '
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suffix <= 0 {
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for (i = preceding_lines; i > 0; i--)
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last[i] = last[i - 1];
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last[0] = $0;
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}
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suffix > 0 {
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print $0;
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suffix--;
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if (suffix <= 0)
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print "";
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}
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suffix <= 0 && /detected stall/ {
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for (i = preceding_lines; i >= 0; i--)
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if (last[i] != "")
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print last[i];
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suffix = trailing_lines;
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}' < "$1" | tr -d '\015' | grep -v clocksource
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