Cuda dim3 constructor12/20/2023 Same as -arch and -code, but may be repeated Generate binary for capability x.y, by default same as -arch Removes output files (with same exact compiler options) Saves intermediate files (e.g., pre-processed) for debugging ![]() List compilation commands, without executing List compilation commands as they are executed #include ĬublasSetVector ( n, elemSize, x_src_host, incx, y_dst_dev, incy ) ĬublasGetVector ( n, elemSize, x_src_dev, incx, y_dst_host, incy ) ĬublasSetVectorAsync( n, elemSize, x_src_host, incx, y_dst_dev, incy, stream ) ĬublasGetVectorAsync( n, elemSize, x_src_dev, incx, y_dst_host, incy, stream ) ĬublasSetMatrix ( rows, cols, elemSize, A_src_host, lda, B_dst_dev, ldb ) ĬublasGetMatrix ( rows, cols, elemSize, A_src_dev, lda, B_dst_host, ldb ) ĬublasSetMatrixAsync( rows, cols, elemSize, A_src_host, lda, B_dst_dev, ldb, stream ) ĬublasGetMatrixAsync( rows, cols, elemSize, A_src_dev, lda, B_dst_host, ldb, stream ) Indices are 1-based this affects result of iamax and iamin. integer indexĬuInit( 0 ) // takes flags for future useĬuDeviceGetName ( name, sizeof(name), dev ) ĬuDeviceComputeCapability( &major, &minor, dev ) ĬuDeviceGetProperties ( &properties, dev ) // max threads, etc. Wall clock cycle counter clock_t clock() Ĭan also return float2 or float4, depending on texRef. Int _ballot( predicate ) // nth thread sets nth bit to predicate Old = atomicCAS ( &addr, compare, value ) // old = *addr *addr = ((old = compare) ? value : old) Old = atomicXor ( &addr, value ) // old = *addr *addr ^= value // compare-and-store Old = atomicOr ( &addr, value ) // old = *addr *addr |= value Old = atomicAnd ( &addr, value ) // old = *addr *addr &= value Old = atomicDec ( &addr, value ) // old = *addr *addr = ((old = 0) or (old > val) ? val : old–1 ) Old = atomicInc ( &addr, value ) // old = *addr *addr = ((old >= value) ? 0 : old+1 ) Old = atomicMax ( &addr, value ) // old = *addr *addr = max( old, value ) // increment up to value, then reset to 0 // decrement down to 0, then reset to value Old = atomicMin ( &addr, value ) // old = *addr *addr = min( old, value ) Old = atomicExch( &addr, value ) // old = *addr *addr = value Old = atomicSub ( &addr, value ) // old = *addr *addr –= value It can be freed in a different kernel, though.Ītomic functions old = atomicAdd ( &addr, value ) // old = *addr *addr += value direction is one of cudaMemcpyHostToDevice or cudaMemcpyDeviceToHostĬudaMemcpy( dst_pointer, src_pointer, size, direction ) ĬudaMemcpyToSymbol ( dev_data, host_data, sizeof(host_data) ) // dev_data = host_dataĬudaMemcpyFromSymbol( host_data, dev_data, sizeof(host_data) ) // host_data = dev_dataĪlso, malloc and free work inside a kernel (2.x), but memory allocated in a kernel must be deallocated in a kernel (not the host). ![]() Memory management _device_ float* pointer Wait until memory accesses are visible to block and device and host (2.x) Wait until memory accesses are visible to block and device Wait until memory accesses are visible to block ) ĭim3 blocks( nx, ny, nz ) // cuda 1.x has 1D and 2D grids, cuda 2.x adds 3D gridsĭim3 threadsPerBlock( mx, my, mz ) // cuda 1.x has 1D, 2D, and 3D blocks ![]() ) ĭim3 can take 1, 2, or 3 argumetns: dim3 blocks1D( 5 ) ), for example: float2 xx = make_float2( 1., 2. Vector types char1, uchar1, short1, ushort1, int1, uint1, long1, ulong1, float1Ĭhar2, uchar2, short2, ushort2, int2, uint2, long2, ulong2, float2Ĭhar3, uchar3, short3, ushort3, int3, uint3, long3, ulong3, float3Ĭhar4, uchar4, short4, ushort4, int4, uint4, long4, ulong4, float4Ĭomponents are accessible as variable.x, variable.y, variable.z, variable.w.Ĭonstructor is make_( x. Most routines return an error code of type cudaError_t. Standard C definition that pointers are not aliased cu files, which contain mixture of host (CPU) and device (GPU) code.ĭeclares kernel, which is called on host and executed on deviceĭeclares device function, which is called and executed on deviceĭeclares host function, which is called and executed on hostĭeclares device variable in global memory, accessible from all threads, with lifetime of applicationĭeclares device variable in constant memory, accessible from all threads, with lifetime of applicationĭeclares device varibale in block's shared memory, accessible from all threads within a block, with lifetime of block
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