64 lines
1.6 KiB
Bash
64 lines
1.6 KiB
Bash
#!/bin/bash
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# Copyright (c) 2021 Johnny on Flame.
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#
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# Provided under the MIT license for the PortMaster packaging system
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# See LICENSE for more details. This is free software.
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# Docs:
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# This script provides the $TASKSET variable when taskset is present, and all
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# sanity checks were passed, otherwise, $TASKSET is left empty.
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# The $TASKSET parameter uses `taskset` to pin your legacy port to the fastest
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# available cores in the system in order to work around any issues arising from
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# possibly unfortunate core scheduling on older kernels.
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#
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# Usage:
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# source $controlfolder/tasksetter.sh
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# $TASKSET ./game
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get_taskset () {
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MAXMHZ_PERF=0
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PERF_CORES=
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TASKSET=
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# Check if we have taskset installed
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if ! command -v taskset &> /dev/null
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then
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echo "taskset not found, bailing..."
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return
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fi
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# Query cpu info
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cpus="$(lscpu -p=CPU,MAXMHZ)"
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if [[ $? != 0 ]]; then
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echo "lscpu failure, bailing... (TASKSET won't be available)"
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return
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fi
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# Iterate over the known cpu cores
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while IFS=, read -r CPU MAXMHZ; do
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if [[ "${CPU::1}" == '#' ]]; then
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continue
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fi
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# Remember the largest seen cpu frequency
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if [[ $MAXMHZ > $MAXMHZ_PERF ]]; then
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MAXMHZ_PERF=$MAXMHZ
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PERF_CORES=$CPU
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elif [[ $MAXMHZ == $MAXMHZ_PERF ]]; then
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PERF_CORES="$PERF_CORES,$CPU"
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fi
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done <<< "$cpus"
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# Do final sanity check
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if [[ "x${PERF_CORES}" == x || ${MAXMHZ_PERF} == 0 ]]; then
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echo "PERFCORES or MAXMHZ were not initialized somehow, bailing... (TASKSET won't be available)"
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return
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fi
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TASKSET="taskset -c ${PERF_CORES} "
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echo "p-cores: $PERF_CORES (@${MAXMHZ_PERF}mhz)"
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}
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get_taskset
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echo "cmd: $TASKSET"
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