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Set CPU frequency governor and frequency before running the benchmarks #6715

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Set CPU frequency governor and frequency before running the benchmarks #6715

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8feb259
Set CPU frequency governor and frequency before running the benchmarks
zeme-wana Nov 28, 2024
6ac616f
Set CPU frequency governor and frequency before running the benchmarks
zeme-wana Nov 28, 2024
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8 changes: 6 additions & 2 deletions nix/shell.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -22,8 +22,12 @@ let
'';


# Underlying benchmarking library used by plutus-benchmark and tasty-papi
papi-pkgs = lib.optional pkgs.hostPlatform.isLinux pkgs.papi;
papi-pkgs = lib.optionals pkgs.hostPlatform.isLinux [
# Needed to fix the frequency and governor of the CPU running the benchmarks
pkgs.cpufrequtils
# Underlying benchmarking library used by plutus-benchmark and tasty-papi
pkgs.papi
];


all-pkgs = [
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4 changes: 4 additions & 0 deletions scripts/ci-plutus-benchmark.sh
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Expand Up @@ -68,6 +68,10 @@ cabal clean
if [[ -z $(which taskset) ]]; then
TASKSET=""
else
echo "[ci-plutus-benchmark]: Setting CPU $CAPABILITY_NUM frequency governor to 'userspace' and frequency to 4.21GHz"
# This makes the benchmark reliable on a single core and addresses the issue of large variance in the results.
cpufreq-set --cpu $CAPABILITY_NUM --governor userspace
cpufreq-set --cpu $CAPABILITY_NUM --related --freq 4.21GHz
TASKSET="taskset -c $CAPABILITY_NUM"
fi

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