Hi
I tried -pthread. My module woks only on Chrome now, it calls "undefined
SharedArrayBuffer" in Firefox when I load my web worker with my module.
(as announced at the end of the page:
https://emscripten.org/docs/porting/pthreads.html
There is no visible performance gain. It was worth give it try, but no
success there. Also i don't understand how this additional
fileName.worker.js file works.
Regards
Adam
W dniu 28.01.2021 o 19:21, 'Thomas Lively' via emscripten-discuss pisze:
Yes, recompiling with -pthread is certainly something you can play
around with. You will probably need to compile all or none of the code
with -pthread, rather than just some of it.
On Thu, Jan 28, 2021 at 02:10 Adam Wnęk <[email protected]
<mailto:[email protected]>> wrote:
Hi
Thanks for advice. I will check this on DevTools. Right now quick
grep search in library src files shows, that there are pthread
header included in several files.
Should I add -pthread flag for compilation of my code? Should i
recompile libraries with -pthread flag?
Regards
Adam
W dniu 28.01.2021 o 00:09, 'Thomas Lively' via emscripten-discuss
pisze:
Ok, thanks for verifying. I'm not familiar with the libraries
you're using. Do they use SIMD or multithreading in the native
versions? That could be a source of large slowdowns if you're not
using those features in the WebAssembly version. You also might
want to profile your application in Chrome's DevTools to see
where it is spending its time and compare that to a profile of
the native build.
On Wed, Jan 27, 2021 at 1:22 PM Adam Wnęk <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I have checked once again. My previous snapshot from make
output was without optimization indeed (different configuration)
Right one looks like that:
/home/adam/Temp/emsdk/upstream/emscripten/em++
-DOCC_CONVERT_SIGNALS
@CMakeFiles/cadModelConverter.dir/includes_CXX.rsp -s WASM=1
-s ALLOW_MEMORY_GROWTH=1 -DNDEBUG -O2 -std=gnu++11 -o
CMakeFiles/cadModelConverter.dir/fileconverter.cpp.o -c
/home/adam/projects/EmscriptenProjects/CadModelConverter/fileconverter.cpp
/home/adam/Temp/emsdk/upstream/emscripten/em++
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/home/adam/Temp/emsdk/upstream/emscripten/em++
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Performance is more or less the same.
Regards
Adam
W dniu 26.01.2021 o 22:28, 'Thomas Lively' via
emscripten-discuss pisze:
Do you see those optimization flags being used in the
verbose make output? For example, in the output in your
original message, you have
/home/adam/Temp/emsdk/upstream/emscripten/em++
-I/home/adam/projects/EmscriptenProjects/CadModelConverter
-I/home/adam/Temp/instal/OCCT_emsdk/include/opencascade
-s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -v -std=gnu++11 -o
CMakeFiles/cadModelConverter.dir/fileconverter.cpp.o -c
/home/adam/projects/EmscriptenProjects/CadModelConverter/fileconverter.cpp
Clearly some flags like " -s WASM=1 -s
ALLOW_MEMORY_GROWTH=1" are being used, but I would have
expected to see optimization flags here as well.
On Tue, Jan 26, 2021 at 1:22 PM Adam Wnęk
<[email protected] <mailto:[email protected]>> wrote:
Hi Thomas,
I'm using -O3 right now. There was no substantial
difference between this and -O2
Adam
W dniu 26.01.2021 o 18:56, 'Thomas Lively' via
emscripten-discuss pisze:
Hi Adam,
I don't see any optimization flags used in your Make
output. Does compiling with `-O2` or `-O3` make
a difference?
Thomas
On Tue, Jan 26, 2021 at 8:17 AM Adam Wnęk
<[email protected] <mailto:[email protected]>> wrote:
Hi
I have small application converting files from IGES
to VRML format. Im using OPENCASCADE librariesto do
so. After compilation in emscripten application
works but it is much slower than the same code
complied using "normal" compilation.
Processing one file takes several seconds then
while doing the same in browser using wasm module
takes several minutes.
In wasm module source file is saved in FS system
than loaded and processed. output data is send back
to JS by value::typed_memory_view. OPENCASCADE
(static) libraries are compiled with emscripten too.
What may be the cause of such huge performance
drop? Im stuck there a bit.
Build platform :Ubuntu
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------------------------------------------------------------------------------------------------------------
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/home/adam/Temp/instal/OCCT_emsdk/include/opencascade
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[ 80%] Linking CXX executable cadModelConverter
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make[2]: Leaving directory
'/home/adam/projects/EmscriptenProjects/CadModelConverter/build'
[100%] Built target cadModelConverter
make[1]: Leaving directory
'/home/adam/projects/EmscriptenProjects/CadModelConverter/build'
/usr/bin/cmake -E cmake_progress_start
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*** Finished ***
---------------------------------------------------------------------------------------
Thanks in advance for any suggestions.
Regards
Adam Wnek
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