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shutils: Speed up cpuidle_wake_all_cpus

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This can currently take several hundred milliseconds on slow targets with many
CPUs. To speed it up, use '&' to spawn the perturbations in paralell.
This commit is contained in:
Brendan Jackman 2017-04-20 15:38:46 +01:00
parent 391e95cc75
commit e276abfcb4
1 changed files with 1 additions and 1 deletions
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2
devlib/bin/scripts/shutils.in
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@ -54,7 +54,7 @@ cpufreq_trace_all_frequencies() {
cpuidle_wake_all_cpus() { cpuidle_wake_all_cpus() {
CPU_PATHS=/sys/devices/system/cpu/cpu[0-9]* CPU_PATHS=/sys/devices/system/cpu/cpu[0-9]*
MASK=0x1; for F in $CPU_PATHS; do MASK=0x1; for F in $CPU_PATHS; do
$BUSYBOX taskset $MASK true $BUSYBOX taskset $MASK true &
MASK=$($BUSYBOX printf '0x%x' $((MASK * 2))) MASK=$($BUSYBOX printf '0x%x' $((MASK * 2)))
done done
} }