Hi everybody:
I am trying to compile kakukogou emscripten (
https://github.com/kakukogou/opencv/tree/opencvjs
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fkakukogou%2Fopencv%2Ftree%2Fopencvjs&sa=D&sntz=1&usg=AFQjCNFXL4Z5ZpMYhoZc_6NjoKsEBZjdkg>)
opencv
library and it compiles fine except these warnings.
WARNING root: ignoring dynamic library libopencv_core.so.3.0.0 because not
compiling to JS or HTML, remember to link it when compiling to JS or HTML
at the end
WARNING root: ignoring dynamic library libopencv_imgproc.so.3.0.0 because
not compiling to JS or HTML, remember to link it when compiling to JS or
HTML at the end
(there are more warnings with the same type, but I write a few).
I think this is emscripten issue because there is no any output to js or
html output.
*But the problem, is when I try to link opencv libraries in facedetection
example, I get this error: *
*fUse: %umul9 = tail call { i16, i1 } @llvm.umul.with.overflow.i16(i16
%61, i16 %59)*
*LLVM ERROR: ExpandArithWithOverflow: At least one argument of
*.with.overflow must be a constant*
*Traceback (most recent call last):*
* File
"/home/VICOMTECH/uelordi/SDK/emsdk_portable/emscripten/master/emcc", line
1301, in <module>*
* shared.Building.llvm_opt(final, link_opts)*
* File
"/home/VICOMTECH/uelordi/SDK/emsdk_portable/emscripten/master/tools/shared.py",
line 1461, in llvm_opt*
* assert os.path.exists(target), 'Failed to run llvm optimizations: ' +
output*
*AssertionError: Failed to run llvm optimizations:*
My script is, the same which is in faceDetection example, and I
add --llvm-opts 0 option, because it seems a clang optimization problem,
but I have the same error.
Thanks in advance.
El miércoles, 31 de diciembre de 2014, 7:51:22 (UTC+1), Tzu-Hao Kuo (Kaku)
escribió:
>
> HI,
>
> I recently evaluate the performance of OpenCV with asm.js.
> Thanks to the OpenCV team, there are already lots of performance tests in
> each OpenCV module.
> What I have done is that compile OpenCV library and its performance tests
> both in native and with asm.js.
> Run the native performance test and the javascript performance test (with the
> Firefox javascript engine).
> And the statistics data could be found in the following Google Sheet
> link:https://docs.google.com/spreadsheets/d/1w8gr1_q_dQclTaGyiMtAhlwj_5_HPVKbHWfwUszPU40/edit?usp=sharing
>
> In summary, there are about 20% tests are faster or equal to the native
> performance and about 60% tests are faster than 3x native performance.
>
> Some patterns are observed.
> First, tests with operations which convert floating point values into integer
> values are much slower.
> Second, in native environment, single operation is much faster when it is
> dealing with integer type data comparing to dealing with floating point
> values;
> however, in javascript environment, the same operation performs equally in
> each data type, which leads to relatively larger performance drop in
> non-floating point data type.
>
>
> By traversing old posts, I found several people have tried to use OpenCV
> in their own projects, however, there is few performance information.
> I post this message here is intending to open a discussion forum which
> could collect information about OpenCV with asm.js and especially the
> performance.
> This message is also posted as a discussion bug in Mozilla Bugzilla, the
> link is, https://bugzilla.mozilla.org/show_bug.cgi?id=1116674.
>
> Tzuhao
>
--
You received this message because you are subscribed to the Google Groups
"emscripten-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
