1e02ab9eb3
Script to strace processes at high priority. Script should be run at high priority, like nice value of -19, to help get a trace of a run-away process consuming high CPU. eg. $ nice -n -19 ./strace-brick.sh glusterfsd 50 will strace glusterfsd processes for 60 seconds which are consuming a minimum of 50% CPU. Change-Id: I6374054c7342b19122a3588d982388199f955930 BUG: 1427397 Signed-off-by: Milind Changire <mchangir@redhat.com>
56 lines
1.5 KiB
Bash
Executable File
56 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# Usage:
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# nice -n -19 strace-brick.sh glusterfsd 50
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brick_process_name=$1
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min_watch_cpu=$2
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if [ ! $brick_process_name ]; then
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brick_process_name=glusterfsd
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fi
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if [ ! $min_watch_cpu ]; then
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min_watch_cpu=50
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fi
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echo "min_watch_cpu: $min_watch_cpu"
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break=false
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while ! $break;
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do
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mypids=( $(pgrep $brick_process_name) )
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echo "mypids: ${mypids[*]}"
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pid_args=$(echo ${mypids[*]} | sed -e 's/ / -p /g;s/^/-p /')
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echo "pid_args: $pid_args"
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pcpu=( $(ps $pid_args -o pcpu -h ) )
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echo "pcpu: ${pcpu[*]}"
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wait_longer=false
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for i in $( seq 0 $((${#pcpu[*]} - 1)) )
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do
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echo "i: $i"
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echo "mypids[$i]: ${mypids[$i]}"
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int_pcpu=$(echo ${pcpu[$i]} | cut -f 1 -d '.')
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echo "int_pcpu: $int_pcpu"
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if [ ! $int_pcpu ] || [ ! $min_watch_cpu ]; then
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break=true
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echo "breaking"
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fi
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if [ $int_pcpu -ge $min_watch_cpu ]; then
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wait_longer=true
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mydirname="${brick_process_name}-${mypids[$i]}-$(date --utc +'%Y%m%d-%H%M%S.%N')"
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$(mkdir $mydirname && cd $mydirname && timeout --kill-after=5 --signal=KILL 60 nice -n -19 strace -p ${mypids[$i]} -ff -tt -T -o $brick_process_name) &
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fi
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done
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if $wait_longer; then
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sleep 90
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else
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sleep 15
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fi
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done
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