63 lines
2.1 KiB
Bash
63 lines
2.1 KiB
Bash
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#!/usr/bin/env zsh
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#
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# Pressure Stall Information monitor
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#
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# Copyright © 2023 Trey Blancher $(base64 -d <<< dHJleUBibGFuY2hlci5uZXQK)
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# Submodules may be distributed under a separate software license; see the
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# LICENSE file within each submodule.
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#
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# This script monitors the three pressure stall information files
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# /proc/pressure{cpu,io,memory} and reports if any resource is above threshold
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# for the "some" values. It takes an optional single argument, the threshold at
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# which to alert. If this is not supplied, it defaults to a threshold of 30.0
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# percent.
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#
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local cpu="/proc/pressure/cpu"
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local cpu_ctr=0
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local io="/proc/pressure/io"
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local io_ctr=0
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local mem="/proc/pressure/memory"
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local mem_ctr=0
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local threshold=30.0
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if [[ -n "${1}" ]]; then
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threshold=${1}
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fi
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# main loop
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while true; do
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local cpu_pct=$(grep 'some' ${cpu} | awk '{print $2}' | awk -F'=' '{print $2}')
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local io_pct=$(grep 'some' ${io} | awk '{print $2}' | awk -F'=' '{print $2}')
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local mem_pct=$(grep 'some' ${mem} | awk '{print $2}' | awk -F'=' '{print $2}')
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if (( cpu_pct > threshold )); then
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cpu_ctr=$(( ${cpu_ctr} + 1 ))
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printf "CPU PSI event %d triggered.\n" ${cpu_ctr}
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fi
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if (( io_pct > threshold )); then
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io_ctr=$(( ${io_ctr} + 1 ))
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printf "IO PSI event %d triggered.\n" ${io_ctr}
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fi
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if (( mem_pct > threshold )); then
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mem_ctr=$(( ${mem_ctr} + 1 ))
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printf "MEM PSI event %d triggered.\n" ${mem_ctr}
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fi
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sleep 10
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done
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