129 lines
5.0 KiB
Bash
129 lines
5.0 KiB
Bash
#!/bin/bash
|
|
|
|
# Get the procs sorted by the number of inotify watches
|
|
# @author Carl-Erik Kopseng
|
|
# @latest https://github.com/fatso83/dotfiles/blob/master/utils/scripts/inotify-consumers
|
|
# Discussion leading up to answer: https://unix.stackexchange.com/questions/15509/whos-consuming-my-inotify-resources
|
|
#
|
|
#
|
|
########################################## Notice ##########################################
|
|
### Since Fall 2022 you should prefer using the following C++ version ###
|
|
### https://github.com/mikesart/inotify-info ###
|
|
############################################################################################
|
|
#
|
|
#
|
|
# The fastest version of this script is here: https://github.com/fatso83/dotfiles/commit/inotify-consumers-v1-fastest
|
|
# Later PRs introduced significant slowdowns at the cost of better output, but it is insignificant on most machines
|
|
# See this for details: https://github.com/fatso83/dotfiles/pull/10#issuecomment-1122374716
|
|
|
|
main(){
|
|
printf "\n%${WLEN}s %${WLEN}s\n" "INOTIFY" "INSTANCES"
|
|
printf "%${WLEN}s %${WLEN}s\n" "WATCHES" "PER "
|
|
printf "%${WLEN}s %${WLEN}s %s\n" " COUNT " "PROCESS " "PID USER COMMAND"
|
|
printf -- "------------------------------------------------------------\n"
|
|
generateData
|
|
}
|
|
|
|
usage(){
|
|
cat << EOF
|
|
Usage: $0 [--help|--limits]
|
|
-l, --limits Will print the current related limits and how to change them
|
|
-h, --help Show this help
|
|
|
|
FYI: Check out Michael Sartain's C++ take on this script. The resulting native executable
|
|
is much faster, modern and feature rich. It can be found at
|
|
https://github.com/mikesart/inotify-info
|
|
|
|
Requires building, but is well worth the few seconds :)
|
|
EOF
|
|
}
|
|
|
|
limits(){
|
|
printf "\nCurrent limits\n-------------\n"
|
|
sysctl fs.inotify.max_user_instances fs.inotify.max_user_watches
|
|
|
|
cat <<- EOF
|
|
Changing settings permanently
|
|
-----------------------------
|
|
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
|
|
sudo sysctl -p # re-read config
|
|
EOF
|
|
}
|
|
|
|
generateData() {
|
|
local -i PROC
|
|
local -i PID
|
|
local -i CNT
|
|
local -i INSTANCES
|
|
local -i TOT
|
|
local -i TOTINSTANCES
|
|
# read process list into cache
|
|
local PSLIST="$(ps ax -o pid,user=WIDE-COLUMN,command $COLSTRING)"
|
|
local INOTIFY="$(find /proc/[0-9]*/fdinfo -type f 2>/dev/null | xargs grep ^inotify 2>/dev/null)"
|
|
local INOTIFYCNT="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" " -f 3 |uniq -c | sed -e 's/:.*//')"
|
|
# unique instances per process is denoted by number of inotify FDs
|
|
local INOTIFYINSTANCES="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" " -f 3,5 | sed -e 's/:.*//'| uniq |awk '{print $1}' |uniq -c)"
|
|
local INOTIFYUSERINSTANCES="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" " -f 3,5 | sed -e 's/:.*//' | uniq |
|
|
while read PID FD; do echo $PID $FD $(grep -e "^ *${PID} " <<< "$PSLIST"|awk '{print $2}'); done | cut -d" " -f 3 | sort | uniq -c |sort -nr)"
|
|
set -e
|
|
|
|
cat <<< "$INOTIFYCNT" |
|
|
{
|
|
while read -rs CNT PROC; do # count watches of processes found
|
|
echo "${PROC},${CNT},$(echo "$INOTIFYINSTANCES" | grep " ${PROC}$" |awk '{print $1}')"
|
|
done
|
|
} |
|
|
grep -v ",0," | # remove entires without watches
|
|
sort -n -t "," -k 2,3 -r | # sort to begin with highest numbers
|
|
{ # group commands so that $TOT is visible in the printf
|
|
IFS=","
|
|
while read -rs PID CNT INSTANCES; do # show watches and corresponding process info
|
|
printf "%$(( WLEN - 2 ))d %$(( WLEN - 2 ))d %s\n" "$CNT" "$INSTANCES" "$(grep -e "^ *${PID} " <<< "$PSLIST")"
|
|
TOT=$(( TOT + CNT ))
|
|
TOTINSTANCES=$(( TOTINSTANCES + INSTANCES))
|
|
done
|
|
# These stats should be per-user as well, since inotify limits are per-user..
|
|
printf "\n%$(( WLEN - 2 ))d %s\n" "$TOT" "WATCHES TOTAL COUNT"
|
|
# the total across different users is somewhat meaningless, not printing for now.
|
|
# printf "\n%$(( WLEN - 2 ))d %s\n" "$TOTINSTANCES" "TOTAL INSTANCES COUNT"
|
|
}
|
|
echo ""
|
|
echo "INotify instances per user (e.g. limits specified by fs.inotify.max_user_instances): "
|
|
echo ""
|
|
(
|
|
echo "INSTANCES USER"
|
|
echo "----------- ------------------"
|
|
echo "$INOTIFYUSERINSTANCES"
|
|
) | column -t
|
|
echo ""
|
|
exit 0
|
|
}
|
|
|
|
# get terminal width
|
|
declare -i COLS=$(tput cols 2>/dev/null || echo 80)
|
|
declare -i WLEN=10
|
|
declare COLSTRING="--columns $(( COLS - WLEN ))" # get terminal width
|
|
|
|
if [ "$1" = "--limits" -o "$1" = "-l" ]; then
|
|
limits
|
|
exit 0
|
|
fi
|
|
|
|
if [ "$1" = "--help" -o "$1" = "-h" ]; then
|
|
usage
|
|
exit 0
|
|
fi
|
|
|
|
# added this line and moved some declarations to allow for the full display instead of a truncated version
|
|
if [ "$1" = "--full" -o "$1" = "-f" ]; then
|
|
unset COLSTRING
|
|
main
|
|
fi
|
|
|
|
if [ -n "$1" ]; then
|
|
printf "\nUnknown parameter '$1'\n" >&2
|
|
usage
|
|
exit 1
|
|
fi
|
|
main
|