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A portable framework for high-order spectral element flow simulations
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cfl_kernel.h
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1#ifndef __MATH_CFL_KERNEL_H__
2#define __MATH_CFL_KERNEL_H__
3/*
4 Copyright (c) 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
41template< typename T>
42__inline__ __device__ T cfl_reduce_warp(T val) {
43 val = fmax(val, __shfl_down_sync(0xffffffff, val, 16));
44 val = fmax(val, __shfl_down_sync(0xffffffff, val, 8));
45 val = fmax(val, __shfl_down_sync(0xffffffff, val, 4));
46 val = fmax(val, __shfl_down_sync(0xffffffff, val, 2));
47 val = fmax(val, __shfl_down_sync(0xffffffff, val, 1));
48 return val;
49}
50
54template< typename T >
55__global__ void cfl_reduce_kernel(T * bufred, const int n) {
56
57 T cfl = 0;
58 const int idx = blockIdx.x * blockDim.x + threadIdx.x;
59 const int str = blockDim.x * gridDim.x;
60 for (int i = idx; i<n ; i += str)
61 {
62 cfl = fmax(cfl, bufred[i]);
63 }
64
65 __shared__ T shared[32];
66 unsigned int lane = threadIdx.x % warpSize;
67 unsigned int wid = threadIdx.x / warpSize;
68
69 cfl = cfl_reduce_warp<T>(cfl);
70 if (lane == 0)
71 shared[wid] = cfl;
72 __syncthreads();
73
74 cfl = (threadIdx.x < blockDim.x / warpSize) ? shared[lane] : 0;
75 if (wid == 0)
76 cfl = cfl_reduce_warp<T>(cfl);
77
78 if (threadIdx.x == 0)
79 bufred[blockIdx.x] = cfl;
80}
81
86template< typename T, const int LX, const int CHUNKS >
87__global__ void cfl_kernel(const T dt,
88 const T * __restrict__ u,
89 const T * __restrict__ v,
90 const T * __restrict__ w,
91 const T * __restrict__ drdx,
92 const T * __restrict__ dsdx,
93 const T * __restrict__ dtdx,
94 const T * __restrict__ drdy,
95 const T * __restrict__ dsdy,
96 const T * __restrict__ dtdy,
97 const T * __restrict__ drdz,
98 const T * __restrict__ dsdz,
99 const T * __restrict__ dtdz,
100 const T * __restrict__ dr_inv,
101 const T * __restrict__ ds_inv,
102 const T * __restrict__ dt_inv,
103 const T * __restrict__ jacinv,
104 T * __restrict__ cfl_h) {
105
106 int i,j,k;
107
108 const int e = blockIdx.x;
109 const int iii = threadIdx.x;
110 const int nchunks = (LX * LX * LX - 1) / CHUNKS + 1;
111 const unsigned int lane = threadIdx.x % warpSize;
112 const unsigned int wid = threadIdx.x / warpSize;
113
114 __shared__ T shu[LX * LX * LX];
115 __shared__ T shv[LX * LX * LX];
116 __shared__ T shw[LX * LX * LX];
117
118 __shared__ T shdr_inv[LX];
119 __shared__ T shds_inv[LX];
120 __shared__ T shdt_inv[LX];
121
122 __shared__ T shjacinv[LX * LX * LX];
123
124 __shared__ T shared[32];
125
126 if (iii < LX) {
127 shdr_inv[iii] = dr_inv[iii];
128 shds_inv[iii] = ds_inv[iii];
129 shdt_inv[iii] = dt_inv[iii];
130 }
131
132 j = iii;
133 while(j < (LX * LX * LX)) {
134 shu[j] = u[j + e * LX * LX * LX];
135 shv[j] = v[j + e * LX * LX * LX];
136 shw[j] = w[j + e * LX * LX * LX];
137
138 shjacinv[j] = jacinv[j + e * LX * LX * LX];
139
140 j = j + CHUNKS;
141 }
142
143 __syncthreads();
144
145 T cfl_tmp = 0.0;
146 for (int n = 0; n < nchunks; n++) {
147 const int ijk = iii + n * CHUNKS;
148 const int jk = ijk / LX;
149 i = ijk - jk * LX;
150 k = jk / LX;
151 j = jk - k * LX;
152 if ( i < LX && j < LX && k < LX) {
153 const T cflr = fabs( dt * ( ( shu[ijk] * drdx[ijk + e * LX * LX * LX]
154 + shv[ijk] * drdy[ijk + e * LX * LX * LX]
155 + shw[ijk] * drdz[ijk + e * LX * LX * LX]
156 ) * shjacinv[ijk]) * shdr_inv[i]);
157 const T cfls = fabs( dt * ( ( shu[ijk] * dsdx[ijk + e * LX * LX * LX]
158 + shv[ijk] * dsdy[ijk + e * LX * LX * LX]
159 + shw[ijk] * dsdz[ijk + e * LX * LX * LX]
160 ) * shjacinv[ijk]) * shds_inv[j]);
161 const T cflt = fabs( dt * ( ( shu[ijk] * dtdx[ijk + e * LX * LX * LX]
162 + shv[ijk] * dtdy[ijk + e * LX * LX * LX]
163 + shw[ijk] * dtdz[ijk + e * LX * LX * LX]
164 ) * shjacinv[ijk]) * shdt_inv[k]);
165
166 cfl_tmp = fmax(cflr + cfls + cflt, cfl_tmp);
167
168 }
169 }
170
171 cfl_tmp = cfl_reduce_warp<T>(cfl_tmp);
172 if (lane == 0)
173 shared[wid] = cfl_tmp;
174 __syncthreads();
175
176 cfl_tmp = (threadIdx.x < blockDim.x / warpSize) ? shared[lane] : 0;
177 if (wid == 0)
178 cfl_tmp = cfl_reduce_warp<T>(cfl_tmp);
179
180 if (threadIdx.x == 0)
181 cfl_h[blockIdx.x] = cfl_tmp;
182}
183
184
185#endif // __MATH_CFL_KERNEL_H__
ale_add_kinematics_kernel
__global__ void ale_add_kinematics_kernel(const int n, T *__restrict__ wx, T *__restrict__ wy, T *__restrict__ wz, const T *__restrict__ x_ref, const T *__restrict__ y_ref, const T *__restrict__ z_ref, const T *__restrict__ phi, const T *__restrict__ x, const T *__restrict__ y, const T *__restrict__ z, const kinematics_params_t kin_params)
Definition ale_kinematics_kernel.h:52
drdy
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ drdy
Definition ax_helm_full_kernel.h:54
shu
__shared__ T shu[LX *LX]
Definition ax_helm_full_kernel.h:69
drdz
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ drdz
Definition ax_helm_full_kernel.h:55
dsdz
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dsdz
Definition ax_helm_full_kernel.h:58
shw
__shared__ T shw[LX *LX]
Definition ax_helm_full_kernel.h:77
dsdy
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dsdy
Definition ax_helm_full_kernel.h:57
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
dtdy
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dtdy
Definition ax_helm_full_kernel.h:60
u
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ u
Definition ax_helm_full_kernel.h:46
e
const int e
Definition ax_helm_full_kernel.h:93
drdx
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ drdx
Definition ax_helm_full_kernel.h:53
dtdz
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dtdz
Definition ax_helm_full_kernel.h:61
dsdx
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dsdx
Definition ax_helm_full_kernel.h:56
v
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ v
Definition ax_helm_full_kernel.h:47
j
const int j
Definition ax_helm_full_kernel.h:94
dtdx
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dtdx
Definition ax_helm_full_kernel.h:59
__syncthreads
__syncthreads()
shv
__shared__ T shv[LX *LX]
Definition ax_helm_full_kernel.h:73
jacinv
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ jacinv
Definition ax_helm_full_kernel.h:62
dt
__global__ void const T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ dt
Definition cdtp_kernel.h:109
cfl_kernel
__global__ void cfl_kernel(const T dt, const T *__restrict__ u, const T *__restrict__ v, const T *__restrict__ w, const T *__restrict__ drdx, const T *__restrict__ dsdx, const T *__restrict__ dtdx, const T *__restrict__ drdy, const T *__restrict__ dsdy, const T *__restrict__ dtdy, const T *__restrict__ drdz, const T *__restrict__ dsdz, const T *__restrict__ dtdz, const T *__restrict__ dr_inv, const T *__restrict__ ds_inv, const T *__restrict__ dt_inv, const T *__restrict__ jacinv, T *__restrict__ cfl_h)
Definition cfl_kernel.h:87
cfl_reduce_kernel
__global__ void cfl_reduce_kernel(T *bufred, const int n)
Definition cfl_kernel.h:55
cfl_reduce_warp
__inline__ __device__ T cfl_reduce_warp(T val)
Definition cfl_kernel.h:42
bufred
real * bufred
Definition math.cu:679