Commit 2010776f authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

tools/rcu: Add an extract-stall script 



This commit adds a script that extracts RCU CPU stall warnings
from console output.  The user can optionally specify the number of
lines preceding the stall to output, and also the number of lines of
stall-warning text.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent b380b10b

tools/rcu/extract-stall.sh

0 → 100644
+34 −0
Original line number Diff line number Diff line 
#!/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