libvips/benchmark/benchmarkn.sh

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#!/bin/sh
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
# 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 [ $? != 0 ]; then
echo "build of test image failed -- out of disc space?"
exit 1
fi
echo -n "test image is" `header -f Xsize temp.v`
echo " by" `header -f Ysize temp.v` "pixels"
echo "starting benchmark ..."
echo "chain=$chain"
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for cpus in 1 2 ; do
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export IM_CONCURRENCY=$cpus
echo IM_CONCURRENCY=$IM_CONCURRENCY
echo time -p vips im_benchmarkn temp.v temp2.v $chain
time -p vips im_benchmarkn temp.v temp2.v $chain
time -p vips im_benchmarkn temp.v temp2.v $chain
if [ $? != 0 ]; then
echo "benchmark failed -- install problem?"
exit 1
fi
# find pixel average ... should be the same for all IM_CONCURRENCY settings
# or we have some kind of terrible bug
echo vips im_avg temp2.v
vips im_avg temp2.v
done