Tests failing on GPU: Binary format for key='0', ident='' is not recognized about portblas HOT 4 CLOSED

Thanks a lot, that's super clear now.

from portblas.

When using nvidia GPUs, you need to output PTX instead of the default SPIR. You can do this by adding -DCOMPUTECPP_BITCODE=ptx64 to your CMake. There's not really any way for CMake to determine which to output since that entirely depends on which devices are available at runtime, while this decision must be made at compile time.

from portblas.

Ah gotcha! Thanks for the quick reply. The tests work now for me.

What I do see during compilation with ninja

make -GNinja ../ -DComputeCpp_DIR=$PWD/../../ComputeCpp-CE-2.1.0-x86_64-linux-gnu/ -DCMAKE_INSTALL_PREFIX=$PWD/../local -DBLAS_ENABLE_TESTING=ON  -DCOMPUTECPP_BITCODE=ptx64
ninja

is a ton of warnings of the sort

warning: [Computecpp:CC0035]: Intrinsic llvm.fmuladd.v4f32 has been generated in function _ZN4blas4GemmINS_10MatrixViewIfN2cl4sycl8accessorIfLi1ELNS3_6access4modeE2ELNS5_6targetE1ELNS5_11placeholderE1EEEiNS_9col_majorEEESB_Lb0ELb0ELb0ELi64ENS_4TileILi2ELi2ELi4ELi4ELi1ELi1ELi4ELi4EEELb0ELb1EfLb0ELi1ELi1ELi2ELi4ELi1EE13compute_panelILb1EZNSE_4evalE__ns1NS3_7nd_itemILi1EEEEUlRKiSJ_E_PU3AS1fSM_EE__ns1vSK_iiiiiSM_SM_SM_ which is illegal in SPIR and may result in a compilation failure [-Wsycl-undef-func]

Is that related to the more moderate compute capabilities of my nvidia gpu?
And maybe more generally, do you have a suggestion for reading material
for this sort of question?

Thanks!

from portblas.

That warning is likely harmless in this case. Anything that happens at compile time has no knowledge of your hardware, so it's not that. I guess we output the warning because it might go wrong at runtime, in which case there will be a record of it in the compilation log (but likely won't). If you do have failures when trying to run these new binaries, please let us know here!

For reading material, the particular error you had does have a few results on Google, and some of those point to another Codeplay repository and hopefully also our support site. Our site has material about compiling for different devices, which should include Nvidia devices, so that might be what you're looking for!

from portblas.