libvips/test/test_threading.sh
John Cupitt 976db37f84
Revised threading system (#3105)
* reimplement threadpool

just a set of threads that get recycled

"ninja test" passes and dzsave seems to work, though pytest fails for
some reason

* clean up threading code a bit

move base stuff into thread.c, so we have a simple

	thread -> threadset -> threadpool

layering

* start trying to revert g_threadpool

based on the original commit

* working!

nice low systime again

still need to repply cnages to threadpool.c since 80e0cc3d1

* reapply fixes from master

so threadpool.c is now up to date

* rename VipsThread as VipsWorker

a bit less confusing

* use a semaphore to count workers in a pool

* tidy up

* formatting

* dynamic threadpool sizing

based on counting the number of blocked threads in each pool

it works, but the improvement is not great :(

* add "concurrency" metadata item

so operators can hint threadpool size (dzsave especially)

* don't use thinstrip for small images

* add RGB mode to openslide

since flatten was taking 20% of CPU time for dzsave

* fix up rgb mode

now actually works

* make the tile buffer per thread

in the new openslideload rgb mode

* fix dynamic pool downsize

* mild refactoring

* fix the buffer system

oops, turned it off by mistake

* all done!

* revise changelog

* Update libvips/iofuncs/threadset.c

Co-authored-by: Kleis Auke Wolthuizen <github@kleisauke.nl>

* Update libvips/iofuncs/threadset.c

Co-authored-by: Kleis Auke Wolthuizen <github@kleisauke.nl>

* LSan: add libMagickCore to suppression file

* Revert "Remove mutex lock for VipsThreadStartFn"

This reverts commit 41440491.

* add VIPS_MAX_THREADS

to set a hard limit on the threadset size

* Revert "Revert "Remove mutex lock for VipsThreadStartFn""

This reverts commit 77e8520966ba79194fff3b4e648bbd295cd5c260.

* remove sslock from sink.c

* move fixed threadpool build to init

not first use

* add some doc comments

* revert test suite threshold change

* add a test for MAX_THREADS

and move the test tmp/ area into the builddir

* limit VIPS_MAX_THREADS to sane values

* use tabs rather than spaces

Co-authored-by: Kleis Auke Wolthuizen <github@kleisauke.nl>
2022-10-26 15:25:19 +01:00

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#!/bin/sh
# set -x
. ./variables.sh
exit_code=0
$vips im_benchmarkn || exit_code=$?
if [ $exit_code -ne 0 ]; then
echo "im_benchmark is not available, skipping test"
exit 0
fi
chain=1
# im_benchmark needs a labq
$vips colourspace $image $tmp/t3.v labq
for tile in 10 64 128 512; do
# benchmark includes a dither which will vary with tile size
$vips --vips-concurrency=1 \
--vips-tile-width=$tile --vips-tile-height=$tile \
im_benchmarkn $tmp/t3.v $tmp/t5.v $chain
for cpus in 2 3 4 5 6 7 8 99; do
echo trying cpus = $cpus, tile = $tile ...
$vips --vips-concurrency=$cpus \
--vips-tile-width=$tile --vips-tile-height=$tile \
im_benchmarkn $tmp/t3.v $tmp/t7.v $chain
$vips subtract $tmp/t5.v $tmp/t7.v $tmp/t8.v
$vips abs $tmp/t8.v $tmp/t9.v
max=$($vips max $tmp/t9.v)
if [ $(echo "$max > 0" | bc) -eq 1 ]; then
break
fi
done
if [ $(echo "$max > 0" | bc) -eq 1 ]; then
break
fi
done
if [ $(echo "$max > 0" | bc) -eq 1 ]; then
echo error, max == $max
exit 1
else
echo all benchmark threading tests passed
fi
# setting VIPS_MAX_THREADS low should force a small thread limit
echo -n "checking threadset size limit ... "
VIPS_MAX_THREADS=5 VIPS_CONCURRENCY=3 vips copy $image x.v || exit_code=$?
if [ $exit_code -ne 0 ]; then
echo FAILED
exit 1
fi
echo ok