parallel_reduce A loop can do a reduction, as in this summation: float SerialSumFoo( float a[], size_t n ) { float sum = 0; for( size_t i=0; i!=n; ++i ) sum += Foo(a[i]); return sum; } If the iterations are ind
parallelReduce同样是处于共识步骤中,LHS 表示初始化的变量,INIT_EXPR是初始化变量的值,DEFINE_BLOCK也是类似于while中可供选择, .invariant(INVARIANT_EXPR)表示循环不变量,每次执行前后都必须为true .while(COND_EXPR)表示循环条件,如果为true开启循环。.case、.api、.timeout和.paySpec组件就像fork语句的相应组件。
_Reduce_type 输入要简化为,可以与输入元素类型的类型不同。 返回值和标识值将具有此类型。 _Range_reduce_fun 大小减少函数的类型。 此类型必须与签名 **_Reduce_type _Range_fun(_Forward_iterator, _Forward_iterator, _Reduce_type)**的函数类型, _Reduce_type 与相同标识类型和减少的结果类型。 _Begin 解...
__global__voiddevice_reduce_stable_kernel_vector4(int*in,int*out,intN){intsum=0;intidx=blockIdx.x*blockDim.x+threadIdx.x;for(inti=idx;i<N/4;i+=blockDim.x*gridDim.x){int4val=reinterpret_cast<int4*>(in)[i];sum+=(val.x+val.y)+(val.z+val.w);}inti=idx+N/4*4;if(i<N...
问Stream.reduce()与Stream.parallel.reduce()EN请注意，替换语义在某些情况下可能会有细微的差别。例如...
1>ptxas info : Function properties for _Z27reduce_gmem_loop_block_256tPK5uint4Pyj 1> 16 bytes stack frame, 0 bytes spill stores, 0 bytes spill loads Notice, unlike the CUDA 4.0 SDK compiler, the 4.1 compiler places uint4 types into local memory. This local memory on Fermi is the L1...
I wonder what would be the best way to split tree to perform parallel reduce. I used the following. But, doesn't work. Thanks in advance. class Range {private:int mygs; // local grainsizepublic:TreeNode *mytree;Range(TreeNode *t, int grainsize) :mytree(t), mygs...
(Nthreads); //TBB parallel_reduce(blocked_range(0,num_steps,GrainSize), step); // parallel_reduce(blocked_range(0,num_steps), step, auto_partitioner()); pi = step.sum*width; stop = clock(); cout << "The value of PI is " << pi << endl; cout << ...
Mapping and historical reconstruction reveal convergent genetic adaptation to reduce flowering time We scored flowering time as days to bolting in plants grown in simulated CVI conditions. We found that plants from both islands flowered significantly earlier than Moroccans (MWW test,W = 1620,p-...
Parallel Pattern 7: ReduceMichael McCool