Neko 0.9.99
A portable framework for high-order spectral element flow simulations
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fusedcg_kernel.h
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1#ifndef __KRYLOV_FUSEDCG_KERNEL_H__
2#define __KRYLOV_FUSEDCG_KERNEL_H__
3/*
4 Copyright (c) 2021-2024, The Neko Authors
5 All rights reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
9 are met:
10
11 * Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13
14 * Redistributions in binary form must reproduce the above
15 copyright notice, this list of conditions and the following
16 disclaimer in the documentation and/or other materials provided
17 with the distribution.
18
19 * Neither the name of the authors nor the names of its
20 contributors may be used to endorse or promote products derived
21 from this software without specific prior written permission.
22
23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
28 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
29 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
31 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
33 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 POSSIBILITY OF SUCH DAMAGE.
35*/
36
38
42template< typename T >
44 const T * __restrict__ z,
45 const T * __restrict__ po,
46 const T beta,
47 const int n) {
48
49 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
50 const int str = blockDim.x * gridDim.x;
51
52 for (int i = idx; i < n; i+= str) {
53 p[i] = beta*po[i] + z[i];
54 }
55
56}
57
61template< typename T >
63 const T ** p,
64 const T * __restrict__ alpha,
65 const int p_cur,
66 const int n) {
67
68 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
69 const int str = blockDim.x * gridDim.x;
70
71 for (int i = idx; i < n; i+= str) {
72 T tmp = 0.0;
73 for (int j = 0; j < p_cur; j ++) {
74 tmp += p[j][i] * alpha[j];
75 }
76 x[i] += tmp;
77 }
78
79}
80
84template< typename T>
86 const T * __restrict__ b,
87 const T * __restrict__ c,
88 const T alpha,
89 T * buf_h,
90 const int n) {
91
92 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
93 const int str = blockDim.x * gridDim.x;
94
95 const unsigned int lane = threadIdx.x % warpSize;
96 const unsigned int wid = threadIdx.x / warpSize;
97
98 __shared__ T buf[32];
99 T tmp = 0.0;
100
101 for (int i = idx; i < n; i+= str) {
102 T rt = a[i] - alpha * c[i];
103 tmp = tmp + rt * b[i] * rt;
104 a[i] = rt;
105 }
106
107 tmp = reduce_warp<T>(tmp);
108 if (lane == 0) {
109 buf[wid] = tmp;
110 }
112
113 tmp = (threadIdx.x < blockDim.x / warpSize) ? buf[lane] : 0;
114 if (wid == 0) {
115 tmp = reduce_warp<T>(tmp);
116 }
117
118 if (threadIdx.x == 0) {
119 buf_h[blockIdx.x] = tmp;
120 }
121}
122
123
124#endif // __KRYLOV_FUSEDCG_KERNEL_H__
const int i
const int j
__syncthreads()
__global__ void const T *__restrict__ x
__global__ void dirichlet_apply_scalar_kernel(const int *__restrict__ msk, T *__restrict__ x, const T g, const int m)
__global__ void fusedcg_update_p_kernel(T *__restrict__ p, const T *__restrict__ z, const T *__restrict__ po, const T beta, const int n)
__global__ void fusedcg_part2_kernel(T *__restrict__ a, const T *__restrict__ b, const T *__restrict__ c, const T alpha, T *buf_h, const int n)
__global__ void fusedcg_update_x_kernel(T *__restrict__ x, const T **p, const T *__restrict__ alpha, const int p_cur, const int n)
real * buf
Definition pipecg_aux.cu:42