Neko 0.9.99
A portable framework for high-order spectral element flow simulations
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pipecg_kernel.h
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1#ifndef __KRYLOV_PIPECG_KERNEL_H__
2#define __KRYLOV_PIPECG_KERNEL_H__
3/*
4 Copyright (c) 2021-2022, 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
37#include <math/bcknd/device/hip/math_kernel.h>
38
42template< typename T >
43__global__ void cg_update_xp_kernel(T * __restrict__ x,
44 T * __restrict__ p,
45 T ** __restrict__ u,
46 const T * alpha,
47 const T * beta,
48 const int p_cur,
49 const int p_space,
50 const int n) {
51
52 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
53 const int str = blockDim.x * gridDim.x;
54
55
56 for (int i = idx; i < n; i+= str) {
57 T tmp = 0.0;
58 int p_prev = p_space;
59 for (int j = 0; j < p_cur; j ++) {
60 p[i] = beta[j]*p[i] + u[p_prev][i];
61 tmp += alpha[j]*p[i];
62 p_prev = j;
63 }
64 x[i] += tmp;
65 u[p_space][i] = u[p_space-1][i];
66 }
67}
68
72template< typename T >
73__global__ void pipecg_vecops_kernel(T * __restrict__ p,
74 T * __restrict__ q,
75 T * __restrict__ r,
76 T * __restrict__ s,
77 T * __restrict__ u1,
78 T * __restrict__ u2,
79 T * __restrict__ w,
80 T * __restrict__ z,
81 T * __restrict__ ni,
82 T * __restrict__ mi,
83 const T alpha,
84 const T beta,
85 const T * mult,
86 T * buf_h1,
87 T * buf_h2,
88 T * buf_h3,
89 const int n) {
90
91 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
92 const int str = blockDim.x * gridDim.x;
93
94 const unsigned int lane = threadIdx.x % warpSize;
95 const unsigned int wid = threadIdx.x / warpSize;
96
97 __shared__ T buf1[64];
98 __shared__ T buf2[64];
99 __shared__ T buf3[64];
100 T tmp1 = 0.0;
101 T tmp2 = 0.0;
102 T tmp3 = 0.0;
103
104 for (int i = idx; i < n; i+= str) {
105 z[i] = beta * z[i] + ni[i];
106 q[i] = beta * q[i] + mi[i];
107 s[i] = beta * s[i] + w[i];
108 r[i] = r[i] - alpha * s[i];
109 u2[i] = u1[i] - alpha * q[i];
110 w[i] = w[i] - alpha * z[i];
111 tmp1 = tmp1 + r[i] * mult[i] * u2[i];
112 tmp2 = tmp2 + w[i] * mult[i] * u2[i];
113 tmp3 = tmp3 + r[i] * mult[i] * r[i];
114
115 }
116
117 tmp1 = reduce_warp<T>(tmp1);
118 tmp2 = reduce_warp<T>(tmp2);
119 tmp3 = reduce_warp<T>(tmp3);
120 if (lane == 0) {
121 buf1[wid] = tmp1;
122 buf2[wid] = tmp2;
123 buf3[wid] = tmp3;
124 }
125 __syncthreads();
126
127 tmp1 = (threadIdx.x < blockDim.x / warpSize) ? buf1[lane] : 0;
128 tmp2 = (threadIdx.x < blockDim.x / warpSize) ? buf2[lane] : 0;
129 tmp3 = (threadIdx.x < blockDim.x / warpSize) ? buf3[lane] : 0;
130 if (wid == 0) {
131 tmp1 = reduce_warp<T>(tmp1);
132 tmp2 = reduce_warp<T>(tmp2);
133 tmp3 = reduce_warp<T>(tmp3);
134 }
135
136 if (threadIdx.x == 0) {
137 buf_h1[blockIdx.x] = tmp1;
138 buf_h2[blockIdx.x] = tmp2;
139 buf_h3[blockIdx.x] = tmp3;
140 }
141
142}
143
144#endif // __KRYLOV_PIPECG_KERNEL_H__
w
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ w
Definition ax_helm_full_kernel.h:48
i
const int i
Definition ax_helm_full_kernel.h:95
u
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ u
Definition ax_helm_full_kernel.h:46
j
const int j
Definition ax_helm_full_kernel.h:94
__syncthreads
__syncthreads()
x
__global__ void const T *__restrict__ x
Definition cdtp_kernel.h:106
dirichlet_apply_scalar_kernel
__global__ void dirichlet_apply_scalar_kernel(const int *__restrict__ msk, T *__restrict__ x, const T g, const int m)
Definition dirichlet_kernel.h:42
pipecg_vecops_kernel
__global__ void pipecg_vecops_kernel(T *__restrict__ p, T *__restrict__ q, T *__restrict__ r, T *__restrict__ s, T *__restrict__ u1, T *__restrict__ u2, T *__restrict__ w, T *__restrict__ z, T *__restrict__ ni, T *__restrict__ mi, const T alpha, const T beta, const T *mult, T *buf_h1, T *buf_h2, T *buf_h3, const int n)
Definition pipecg_kernel.h:72
cg_update_xp_kernel
__global__ void cg_update_xp_kernel(T *__restrict__ x, T *__restrict__ p, T **__restrict__ u, const T *alpha, const T *beta, const int p_cur, const int p_space, const int n)
Definition pipecg_kernel.h:43
math_kernel.h