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README.cuda.md

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Using Gdev's CUDA

Follow the instruction below to use Gdev's CUDA. You may be required to install additional software packages depending on your environment. e.g., bison, flex, boost, boost-devel

$(TOPDIR) represents your top working directory where you installed the Gdev repository.

1. Gdev's CUDA installation

Gdev currently supports a limited set of CUDA Driver/Runtime API. It is defined as Micro CUDA (uCUDA) in Gdev.

cd $(TOPDIR)/gdev/cuda
mkdir build
cd build
#if you want to disable Runtime API
../configure --disable-runtime
#else if you want to use a PTX parser of GPU Ocelot
../configure --with-ptx
#else
../configure
#endif
make
sudo make install

Gdev also supports CUDA in the operating system. You are required to install kcuda module to use this functionality.

Note: that kcuda supports CUDA Driver API only.

cd $(TOPDIR)/gdev/cuda
mkdir kbuild
cd kbuild
../configure --target=kcuda
make
sudo make install

2. CUDA Driver API test (user-space programs)

cd $(TOPDIR)/test/cuda/user/madd
make
./user_test 256 # a[256] + b[256] = c[256]

3. CUDA Driver API test (kernel-space programs)

Note that you need kcuda to be installed a priori if you want to run CUDA in the OS.

cd $(TOPDIR)/test/cuda/kernel/memcpy
make
sudo insmod ./kernel_test.ko size=10000 # copy 0x10000 size

NOTE: Please be careful when doing this test as it runs a program in module_init(). If you run a very long program as it is, you may crash your system. If you want to run a very long program, you must provide a proper module implementation, e.g., using kernel threads.