mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 06:01:57 +00:00
236bdb881d
This commit converts extract-stall.sh script's header comment to a usage() function, and adds an argument check. While in the area, make this script be executable. [ paulmck: Strength argument check, remove extraneous comment. ] Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
49 lines
1.0 KiB
Bash
Executable File
49 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
|
|
usage() {
|
|
echo Extract any RCU CPU stall warnings present in specified file.
|
|
echo Filter out clocksource lines. Note that preceding-lines excludes the
|
|
echo initial line of the stall warning but trailing-lines includes it.
|
|
echo
|
|
echo Usage: $(basename $0) dmesg-file [ preceding-lines [ trailing-lines ] ]
|
|
echo
|
|
echo Error: $1
|
|
}
|
|
|
|
# Terminate the script, if the argument is missing
|
|
|
|
if test -f "$1" && test -r "$1"
|
|
then
|
|
:
|
|
else
|
|
usage "Console log file \"$1\" missing or unreadable."
|
|
exit 1
|
|
fi
|
|
|
|
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
|
|
|