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* cleanup prepare script

* native image options

* fix quardaric probing (no change to perf)

* mask to get the last chunk of the name

* extract hash functions

* tweak the probing loop (-100ms)

* fiddle with native image options

* Reorder conditions in hope it makes branch predictor happier

* extracted constant
This commit is contained in:
Roman Musin
2024-01-27 14:17:55 +00:00
committed by GitHub
parent c228633b57
commit f9c58414da
3 changed files with 60 additions and 43 deletions
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21
calculate_average_roman-r-m.sh
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@@ -15,21 +15,16 @@
# limitations under the License.
#
JAVA_OPTS="--enable-preview -XX:+UseTransparentHugePages"
# epsilon GC needs enough memory or it makes things worse
# see https://stackoverflow.com/questions/58087596/why-are-repeated-memory-allocations-observed-to-be-slower-using-epsilon-vs-g1
JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:-EnableJVMCI -XX:+UseEpsilonGC -Xmx1G -Xms1G -XX:+AlwaysPreTouch"
if [ -f target/CalculateAverage_roman_r_m_image ]; then
echo "Picking up existing native image 'target/CalculateAverage_roman_r_m_image', delete the file to select JVM mode." 1>&2
echo "Running native image 'target/CalculateAverage_roman_r_m_image'." 1>&2
target/CalculateAverage_roman_r_m_image
else
JAVA_OPTS="--enable-preview -XX:+UnlockExperimentalVMOptions -XX:+TrustFinalNonStaticFields -dsa -XX:+UseNUMA"
if [[ ! "$(uname -s)" = "Darwin" ]]; then
# On OS/X, my machine, this errors:
JAVA_OPTS="$JAVA_OPTS -XX:+UseTransparentHugePages"
fi
echo "Choosing to run the app in JVM mode as no native image was found, use additional_build_step_roman_r_m.sh to generate." 1>&2
JAVA_OPTS="--enable-preview -XX:+UseTransparentHugePages"
JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:+TrustFinalNonStaticFields -dsa -XX:+UseNUMA"
# epsilon GC needs enough memory or it makes things worse
# see https://stackoverflow.com/questions/58087596/why-are-repeated-memory-allocations-observed-to-be-slower-using-epsilon-vs-g1
JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:-EnableJVMCI -XX:+UseEpsilonGC -Xmx1G -Xms1G -XX:+AlwaysPreTouch"
echo "Running on JVM" 1>&2
java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m
fi