libvips/benchmark/benchmarkn.sh

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#!/bin/bash
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uname -a
gcc --version
vips --version
# how large an image do you want to process?
# sample2.v is 290x442 pixels ... replicate this many times horizontally and
# vertically to get a highres image for the benchmark
tile=13
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# how complex an operation do you want to run?
# this sets the number of copies of the benchmark we chain together:
# higher values run more slowly and are more likely to be CPU-bound
chain=1
echo building test image ...
echo "tile=$tile"
vips im_replicate sample2.v temp.v $tile $tile
if [ $? != 0 ]; then
echo "build of test image failed -- out of disc space?"
exit 1
fi
echo -n "test image is" `header -f width temp.v`
echo " by" `header -f height temp.v` "pixels"
max_cpus=`vips im_concurrency_get`
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echo "max cpus = $max_cpus"
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echo "starting benchmark ..."
echo /usr/bin/time -f %e vips \
--vips-concurrency=xx \
im_benchmarkn temp.v temp2.v $chain
echo reported real-time is best of three runs
echo cpus real-time
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for((cpus = 1; cpus <= max_cpus; cpus++)); do
t1=`/usr/bin/time -f %e vips \
--vips-concurrency=$cpus \
im_benchmarkn temp.v temp2.v $chain 2>&1`
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if [ $? != 0 ]; then
echo "benchmark failed -- install problem?"
exit 1
fi
t2=`/usr/bin/time -f %e vips \
--vips-concurrency=$cpus \
im_benchmarkn temp.v temp2.v $chain 2>&1`
t3=`/usr/bin/time -f %e vips \
--vips-concurrency=$cpus \
im_benchmarkn temp.v temp2.v $chain 2>&1`
# echo $t1 $t2 $t3
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if [[ $t2 < $t1 ]]; then
t1=$t2
fi
if [[ $t3 < $t1 ]]; then
t1=$t3
fi
echo $cpus $t1
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done