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-rw-r--r-- | tools/rcu/extract-stall.sh | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/rcu/extract-stall.sh b/tools/rcu/extract-stall.sh new file mode 100644 index 000000000000..e565697c9f90 --- /dev/null +++ b/tools/rcu/extract-stall.sh @@ -0,0 +1,34 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0+ +# +# Extract any RCU CPU stall warnings present in specified file. +# Filter out clocksource lines. Note that preceding-lines excludes the +# initial line of the stall warning but trailing-lines includes it. +# +# Usage: extract-stall.sh dmesg-file [ preceding-lines [ trailing-lines ] ] + +echo $1 +preceding_lines="${2-3}" +trailing_lines="${3-10}" + +awk -v preceding_lines="$preceding_lines" -v trailing_lines="$trailing_lines" ' +suffix <= 0 { + for (i = preceding_lines; i > 0; i--) + last[i] = last[i - 1]; + last[0] = $0; +} + +suffix > 0 { + print $0; + suffix--; + if (suffix <= 0) + print ""; +} + +suffix <= 0 && /detected stall/ { + for (i = preceding_lines; i >= 0; i--) + if (last[i] != "") + print last[i]; + suffix = trailing_lines; +}' < "$1" | tr -d '\015' | grep -v clocksource + |