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1 | // -------------------------------------------------------------------------- |
2 | // | |
3 | // Copyright | |
4 | // Markus Wittmann, 2016-2017 | |
5 | // RRZE, University of Erlangen-Nuremberg, Germany | |
6 | // markus.wittmann -at- fau.de or hpc -at- rrze.fau.de | |
7 | // | |
8 | // Viktor Haag, 2016 | |
9 | // LSS, University of Erlangen-Nuremberg, Germany | |
10 | // | |
11 | // This file is part of the Lattice Boltzmann Benchmark Kernels (LbmBenchKernels). | |
12 | // | |
13 | // LbmBenchKernels is free software: you can redistribute it and/or modify | |
14 | // it under the terms of the GNU General Public License as published by | |
15 | // the Free Software Foundation, either version 3 of the License, or | |
16 | // (at your option) any later version. | |
17 | // | |
18 | // LbmBenchKernels is distributed in the hope that it will be useful, | |
19 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | // GNU General Public License for more details. | |
22 | // | |
23 | // You should have received a copy of the GNU General Public License | |
24 | // along with LbmBenchKernels. If not, see <http://www.gnu.org/licenses/>. | |
25 | // | |
26 | // -------------------------------------------------------------------------- | |
27 | #include "BenchKernelD3Q19AaCommon.h" | |
28 | ||
29 | #include "Memory.h" | |
30 | #include "Vtk.h" | |
31 | #include "LikwidIf.h" | |
32 | ||
33 | #include <inttypes.h> | |
34 | #include <math.h> | |
35 | ||
36 | #ifdef _OPENMP | |
37 | #include <omp.h> | |
38 | #endif | |
39 | ||
40 | void FNAME(D3Q19AaKernel)(LatticeDesc * ld, KernelData * kernelData, CaseData * cd) | |
41 | { | |
42 | Assert(ld != NULL); | |
43 | Assert(kernelData != NULL); | |
44 | Assert(cd != NULL); | |
45 | ||
46 | Assert(cd->Omega > 0.0); | |
47 | Assert(cd->Omega < 2.0); | |
48 | ||
49 | KernelData * kd = (KernelData *)kernelData; | |
50 | ||
51 | ||
52 | int nX = ld->Dims[0]; | |
53 | int nY = ld->Dims[1]; | |
54 | int nZ = ld->Dims[2]; | |
55 | ||
56 | int * gDims = kd->GlobalDims; | |
57 | ||
58 | int oX = kd->Offsets[0]; | |
59 | int oY = kd->Offsets[1]; | |
60 | int oZ = kd->Offsets[2]; | |
61 | ||
62 | KernelDataAa * kda = KDA(kd); | |
63 | ||
64 | int blk[3]; | |
65 | blk[0] = kda->Blk[0]; | |
66 | blk[1] = kda->Blk[1]; | |
67 | blk[2] = kda->Blk[2]; | |
68 | ||
69 | PdfT omega = cd->Omega; | |
70 | PdfT omegaEven = omega; | |
71 | PdfT magicParam = 1.0 / 12.0; | |
72 | // 1/4: best stability; | |
73 | // 1/12: removes third-order advection error (best advection); | |
74 | // 1/6: removes fourth-order diffusion error (best diffusion); | |
75 | // 3/16: exact location of bounce back for poiseuille flow | |
76 | ||
77 | PdfT omegaOdd = 1.0/( 0.5 + magicParam/(1.0/omega - 0.5) ); | |
78 | ||
79 | PdfT evenPart = 0.0; | |
80 | PdfT oddPart = 0.0; | |
81 | PdfT dir_indep_trm = 0.0; | |
82 | ||
83 | PdfT w_0 = 1.0 / 3.0; | |
84 | PdfT w_1 = 1.0 / 18.0; | |
85 | PdfT w_2 = 1.0 / 36.0; | |
86 | ||
87 | PdfT w_1_x3 = w_1 * 3.0; PdfT w_1_nine_half = w_1 * 9.0/2.0; PdfT w_1_indep = 0.0; | |
88 | PdfT w_2_x3 = w_2 * 3.0; PdfT w_2_nine_half = w_2 * 9.0/2.0; PdfT w_2_indep = 0.0; | |
89 | ||
90 | PdfT ux, uy, uz, ui; | |
91 | PdfT dens; | |
92 | ||
93 | // Declare pdf_N, pdf_E, pdf_S, pdf_W, ... | |
94 | #define X(name, idx, idxinv, x, y, z) PdfT JOIN(pdf_,name); | |
95 | D3Q19_LIST | |
96 | #undef X | |
97 | ||
98 | PdfT * src = kd->Pdfs[0]; | |
99 | ||
100 | int maxIterations = cd->MaxIterations; | |
101 | ||
102 | #ifdef VTK_OUTPUT | |
103 | if (cd->VtkOutput) { | |
104 | kd->PdfsActive = src; | |
105 | VtkWrite(ld, kd, cd, -1); | |
106 | } | |
107 | #endif | |
108 | ||
109 | #ifdef STATISTICS | |
110 | kd->PdfsActive = src; | |
111 | KernelStatistics(kd, ld, cd, 0); | |
112 | #endif | |
113 | ||
114 | ||
115 | int nThreads = 1; | |
116 | ||
117 | #ifdef _OPENMP | |
118 | nThreads = omp_get_max_threads(); | |
119 | #endif | |
120 | ||
121 | for (int iter = 0; iter < maxIterations; iter += 2) { | |
122 | ||
123 | // -------------------------------------------------------------------- | |
124 | // even time step | |
125 | ||
126 | X_LIKWID_START("aa-even"); | |
127 | ||
128 | // {{{ | |
129 | ||
130 | #ifdef _OPENMP | |
131 | #pragma omp parallel for default(none) \ | |
132 | shared(gDims,src, w_0, w_1, w_2, omegaEven, omegaOdd, \ | |
133 | w_1_x3, w_2_x3, w_1_nine_half, w_2_nine_half, cd, \ | |
134 | oX, oY, oZ, nX, nY, nZ, blk, nThreads, ld) \ | |
135 | private(ux, uy, uz, ui, dens, dir_indep_trm, \ | |
136 | pdf_C, \ | |
137 | pdf_N, pdf_E, pdf_S, pdf_W, \ | |
138 | pdf_NE, pdf_SE, pdf_SW, pdf_NW, \ | |
139 | pdf_T, pdf_TN, pdf_TE, pdf_TS, pdf_TW, \ | |
140 | pdf_B, pdf_BN, pdf_BE, pdf_BS, pdf_BW, \ | |
141 | evenPart, oddPart, w_1_indep, w_2_indep) | |
142 | #endif | |
143 | ||
144 | for (int i = 0; i < nThreads; ++i) { | |
145 | ||
146 | int threadStartX = nX / nThreads * i; | |
147 | int threadEndX = nX / nThreads * (i + 1); | |
148 | ||
149 | if (nX % nThreads > 0) { | |
150 | if (nX % nThreads > i) { | |
151 | threadStartX += i; | |
152 | threadEndX += i + 1; | |
153 | } | |
154 | else { | |
155 | threadStartX += nX % nThreads; | |
156 | threadEndX += nX % nThreads; | |
157 | } | |
158 | } | |
159 | ||
160 | for (int bX = oX + threadStartX; bX < threadEndX + oX; bX += blk[0]) { | |
161 | for (int bY = oY; bY < nY + oY; bY += blk[1]) { | |
162 | for (int bZ = oZ; bZ < nZ + oZ; bZ += blk[2]) { | |
163 | ||
164 | int eX = MIN(bX + blk[0], threadEndX + oX); | |
165 | int eY = MIN(bY + blk[1], nY + oY); | |
166 | int eZ = MIN(bZ + blk[2], nZ + oZ); | |
167 | ||
168 | // printf("%d: %d-%d %d-%d %d-%d %d - %d\n", omp_get_thread_num(), bZ, eZ, bY, eY, bX, eX, threadStartX, threadEndX); | |
169 | ||
170 | for (int x = bX; x < eX; ++x) { | |
171 | for (int y = bY; y < eY; ++y) { | |
172 | for (int z = bZ; z < eZ; ++z) { | |
173 | ||
174 | ||
175 | if (ld->Lattice[L_INDEX_4(ld->Dims, x - oX, y - oY, z - oZ)] == LAT_CELL_OBSTACLE) { | |
176 | continue; | |
177 | } | |
178 | ||
179 | #define I(x, y, z, dir) P_INDEX_5(gDims, (x), (y), (z), (dir)) | |
180 | ||
181 | ||
182 | // Load PDFs of local cell: pdf_N = src[I(x, y, z, D3Q19_N)]; ... | |
183 | #define X(name, idx, idxinv, _x, _y, _z) JOIN(pdf_,name) = src[I(x, y, z, idx)]; | |
184 | D3Q19_LIST | |
185 | #undef X | |
186 | ||
187 | // #define LID_DRIVEN_CAVITY | |
188 | ||
189 | #ifdef LID_DRIVEN_CAVITY | |
190 | ||
191 | if (z == nZ - 4 + oZ && x > 3 + oX && x < (nX - 4 + oX) && y > 3 + oY && y < (nY - 4 + oY)) { | |
192 | ux = 0.1 * 0.577; | |
193 | uy = 0.0; | |
194 | uz = 0.0; | |
195 | ||
196 | } else { | |
197 | #endif | |
198 | ux = pdf_E + pdf_NE + pdf_SE + pdf_TE + pdf_BE - | |
199 | pdf_W - pdf_NW - pdf_SW - pdf_TW - pdf_BW; | |
200 | uy = pdf_N + pdf_NE + pdf_NW + pdf_TN + pdf_BN - | |
201 | pdf_S - pdf_SE - pdf_SW - pdf_TS - pdf_BS; | |
202 | uz = pdf_T + pdf_TE + pdf_TW + pdf_TN + pdf_TS - | |
203 | pdf_B - pdf_BE - pdf_BW - pdf_BN - pdf_BS; | |
204 | #ifdef LID_DRIVEN_CAVITY | |
205 | } | |
206 | #endif | |
207 | ||
208 | dens = pdf_C + | |
209 | pdf_N + pdf_E + pdf_S + pdf_W + | |
210 | pdf_NE + pdf_SE + pdf_SW + pdf_NW + | |
211 | pdf_T + pdf_TN + pdf_TE + pdf_TS + pdf_TW + | |
212 | pdf_B + pdf_BN + pdf_BE + pdf_BS + pdf_BW; | |
213 | ||
214 | dir_indep_trm = dens - (ux * ux + uy * uy + uz * uz)*3.0/2.0; | |
215 | ||
216 | // direction: w_0 | |
217 | src[I(x, y, z, D3Q19_C)] = pdf_C - omegaEven*(pdf_C - w_0*dir_indep_trm); | |
218 | ||
219 | // direction: w_1 | |
220 | w_1_indep = w_1*dir_indep_trm; | |
221 | ||
222 | ui = uy; | |
223 | evenPart = omegaEven*( 0.5*(pdf_N + pdf_S) - ui*ui*w_1_nine_half - w_1_indep ); | |
224 | oddPart = omegaOdd*(0.5*(pdf_N - pdf_S) - ui*w_1_x3 ); | |
225 | src[I(x, y, z, D3Q19_S)] = pdf_N - evenPart - oddPart; | |
226 | src[I(x, y, z, D3Q19_N)] = pdf_S - evenPart + oddPart; | |
227 | ||
228 | ui = ux; | |
229 | evenPart = omegaEven*( 0.5*(pdf_E + pdf_W) - ui*ui*w_1_nine_half - w_1_indep ); | |
230 | oddPart = omegaOdd*(0.5*(pdf_E - pdf_W) - ui*w_1_x3 ); | |
231 | src[I(x, y, z, D3Q19_W)] = pdf_E - evenPart - oddPart; | |
232 | src[I(x, y, z, D3Q19_E)] = pdf_W - evenPart + oddPart; | |
233 | ||
234 | ui = uz; | |
235 | evenPart = omegaEven*( 0.5*(pdf_T + pdf_B) - ui*ui*w_1_nine_half - w_1_indep ); | |
236 | oddPart = omegaOdd*(0.5*(pdf_T - pdf_B) - ui*w_1_x3 ); | |
237 | src[I(x, y, z, D3Q19_B)] = pdf_T - evenPart - oddPart; | |
238 | src[I(x, y, z, D3Q19_T)] = pdf_B - evenPart + oddPart; | |
239 | ||
240 | // direction: w_2 | |
241 | w_2_indep = w_2*dir_indep_trm; | |
242 | ||
243 | ui = -ux + uy; | |
244 | evenPart = omegaEven*( 0.5*(pdf_NW + pdf_SE) - ui*ui*w_2_nine_half - w_2_indep ); | |
245 | oddPart = omegaOdd*(0.5*(pdf_NW - pdf_SE) - ui*w_2_x3 ); | |
246 | src[I(x, y, z, D3Q19_SE)] = pdf_NW - evenPart - oddPart; | |
247 | src[I(x, y, z, D3Q19_NW)] = pdf_SE - evenPart + oddPart; | |
248 | ||
249 | ui = ux + uy; | |
250 | evenPart = omegaEven*( 0.5*(pdf_NE + pdf_SW) - ui*ui*w_2_nine_half - w_2_indep ); | |
251 | oddPart = omegaOdd*(0.5*(pdf_NE - pdf_SW) - ui*w_2_x3 ); | |
252 | src[I(x, y, z, D3Q19_SW)] = pdf_NE - evenPart - oddPart; | |
253 | src[I(x, y, z, D3Q19_NE)] = pdf_SW - evenPart + oddPart; | |
254 | ||
255 | ui = -ux + uz; | |
256 | evenPart = omegaEven*( 0.5*(pdf_TW + pdf_BE) - ui*ui*w_2_nine_half - w_2_indep ); | |
257 | oddPart = omegaOdd*(0.5*(pdf_TW - pdf_BE) - ui*w_2_x3 ); | |
258 | src[I(x, y, z, D3Q19_BE)] = pdf_TW - evenPart - oddPart; | |
259 | src[I(x, y, z, D3Q19_TW)] = pdf_BE - evenPart + oddPart; | |
260 | ||
261 | ui = ux + uz; | |
262 | evenPart = omegaEven*( 0.5*(pdf_TE + pdf_BW) - ui*ui*w_2_nine_half - w_2_indep ); | |
263 | oddPart = omegaOdd*(0.5*(pdf_TE - pdf_BW) - ui*w_2_x3 ); | |
264 | src[I(x, y, z, D3Q19_BW)] = pdf_TE - evenPart - oddPart; | |
265 | src[I(x, y, z, D3Q19_TE)] = pdf_BW - evenPart + oddPart; | |
266 | ||
267 | ui = -uy + uz; | |
268 | evenPart = omegaEven*( 0.5*(pdf_TS + pdf_BN) - ui*ui*w_2_nine_half - w_2_indep ); | |
269 | oddPart = omegaOdd*(0.5*(pdf_TS - pdf_BN) - ui*w_2_x3 ); | |
270 | src[I(x, y, z, D3Q19_BN)] = pdf_TS - evenPart - oddPart; | |
271 | src[I(x, y, z, D3Q19_TS)] = pdf_BN - evenPart + oddPart; | |
272 | ||
273 | ui = uy + uz; | |
274 | evenPart = omegaEven*( 0.5*(pdf_TN + pdf_BS) - ui*ui*w_2_nine_half - w_2_indep ); | |
275 | oddPart = omegaOdd*(0.5*(pdf_TN - pdf_BS) - ui*w_2_x3 ); | |
276 | src[I(x, y, z, D3Q19_BS)] = pdf_TN - evenPart - oddPart; | |
277 | src[I(x, y, z, D3Q19_TN)] = pdf_BS - evenPart + oddPart; | |
278 | ||
279 | #undef I | |
280 | } } } // z, y, x (from inner to outer) | |
281 | } } } // z, y, x (from inner to outer) | |
282 | ||
283 | } // loop over threads | |
284 | ||
285 | // }}} | |
286 | ||
287 | X_LIKWID_STOP("aa-even"); | |
288 | ||
289 | #ifdef STATISTICS | |
290 | kd->PdfsActive = src; | |
291 | KernelStatistics(kd, ld, cd, iter); | |
292 | #endif | |
293 | ||
294 | // Fixup bounce back PDFs. | |
295 | #ifdef _OPENMP | |
296 | #pragma omp parallel for default(none) \ | |
297 | shared(kd, src) | |
298 | #endif | |
299 | for (int i = 0; i < kd->nBounceBackPdfs; ++i) { | |
300 | src[kd->BounceBackPdfsSrc[i]] = src[kd->BounceBackPdfsDst[i]]; | |
301 | } | |
302 | ||
303 | // save current iteration | |
304 | kda->Iteration = iter; | |
305 | ||
306 | #ifdef VERIFICATION | |
307 | kd->PdfsActive = src; | |
308 | KernelAddBodyForce(kd, ld, cd); | |
309 | #endif | |
310 | ||
311 | #ifdef VTK_OUTPUT | |
312 | if (cd->VtkOutput && (iter % cd->VtkModulus) == 0) { | |
313 | kd->PdfsActive = src; | |
314 | VtkWrite(ld, kd, cd, iter); | |
315 | } | |
316 | #endif | |
317 | ||
318 | #ifdef STATISTICS | |
319 | kd->PdfsActive = src; | |
320 | KernelStatistics(kd, ld, cd, iter); | |
321 | #endif | |
322 | ||
323 | // -------------------------------------------------------------------- | |
324 | // odd time step | |
325 | ||
326 | ||
327 | X_LIKWID_START("aa-odd"); | |
328 | ||
329 | // {{{ | |
330 | ||
331 | #ifdef _OPENMP | |
332 | #pragma omp parallel for default(none) \ | |
333 | shared(gDims,src, w_0, w_1, w_2, omegaEven, omegaOdd, \ | |
334 | w_1_x3, w_2_x3, w_1_nine_half, w_2_nine_half, cd, \ | |
335 | oX, oY, oZ, nX, nY, nZ, blk, nThreads) \ | |
336 | private(ux, uy, uz, ui, dens, dir_indep_trm, \ | |
337 | pdf_C, \ | |
338 | pdf_N, pdf_E, pdf_S, pdf_W, \ | |
339 | pdf_NE, pdf_SE, pdf_SW, pdf_NW, \ | |
340 | pdf_T, pdf_TN, pdf_TE, pdf_TS, pdf_TW, \ | |
341 | pdf_B, pdf_BN, pdf_BE, pdf_BS, pdf_BW, \ | |
342 | evenPart, oddPart, w_1_indep, w_2_indep) | |
343 | #endif | |
344 | ||
345 | for (int i = 0; i < nThreads; ++i) { | |
346 | ||
347 | int threadStartX = nX / nThreads * i; | |
348 | int threadEndX = nX / nThreads * (i + 1); | |
349 | ||
350 | if (nX % nThreads > 0) { | |
351 | if (nX % nThreads > i) { | |
352 | threadStartX += i; | |
353 | threadEndX += i + 1; | |
354 | } | |
355 | else { | |
356 | threadStartX += nX % nThreads; | |
357 | threadEndX += nX % nThreads; | |
358 | } | |
359 | } | |
360 | ||
361 | for (int bX = oX + threadStartX; bX < threadEndX + oX; bX += blk[0]) { | |
362 | for (int bY = oY; bY < nY + oY; bY += blk[1]) { | |
363 | for (int bZ = oZ; bZ < nZ + oZ; bZ += blk[2]) { | |
364 | ||
365 | // Must do everything here, else it would break collapse. | |
366 | int eZ = MIN(bZ + blk[2], nZ + oZ); | |
367 | int eY = MIN(bY + blk[1], nY + oY); | |
368 | int eX = MIN(bX + blk[0], threadEndX + oX); | |
369 | ||
370 | for (int x = bX; x < eX; ++x) { | |
371 | for (int y = bY; y < eY; ++y) { | |
372 | for (int z = bZ; z < eZ; ++z) { | |
373 | ||
374 | #define I(x, y, z, dir) P_INDEX_5(gDims, (x), (y), (z), (dir)) | |
375 | ||
376 | // Load PDFs of local cell: pdf_N = src[I(x, y, z, D3Q19_N)]; ... | |
377 | #define X(name, idx, idxinv, _x, _y, _z) JOIN(pdf_,name) = src[I(x - _x, y - _y, z - _z, idxinv)]; | |
378 | D3Q19_LIST | |
379 | #undef X | |
380 | ||
381 | ||
382 | // #define LID_DRIVEN_CAVITY | |
383 | ||
384 | #ifdef LID_DRIVEN_CAVITY | |
385 | ||
386 | if (z == nZ - 4 + oZ && x > 3 + oX && x < (nX - 4 + oX) && y > 3 + oY && y < (nY - 4 + oY)) { | |
387 | ux = 0.1 * 0.577; | |
388 | uy = 0.0; | |
389 | uz = 0.0; | |
390 | ||
391 | } else { | |
392 | #endif | |
393 | ux = pdf_E + pdf_NE + pdf_SE + pdf_TE + pdf_BE - | |
394 | pdf_W - pdf_NW - pdf_SW - pdf_TW - pdf_BW; | |
395 | uy = pdf_N + pdf_NE + pdf_NW + pdf_TN + pdf_BN - | |
396 | pdf_S - pdf_SE - pdf_SW - pdf_TS - pdf_BS; | |
397 | uz = pdf_T + pdf_TE + pdf_TW + pdf_TN + pdf_TS - | |
398 | pdf_B - pdf_BE - pdf_BW - pdf_BN - pdf_BS; | |
399 | #ifdef LID_DRIVEN_CAVITY | |
400 | } | |
401 | #endif | |
402 | ||
403 | dens = pdf_C + | |
404 | pdf_N + pdf_E + pdf_S + pdf_W + | |
405 | pdf_NE + pdf_SE + pdf_SW + pdf_NW + | |
406 | pdf_T + pdf_TN + pdf_TE + pdf_TS + pdf_TW + | |
407 | pdf_B + pdf_BN + pdf_BE + pdf_BS + pdf_BW; | |
408 | ||
409 | dir_indep_trm = dens - (ux * ux + uy * uy + uz * uz)*3.0/2.0; | |
410 | ||
411 | // direction: w_0 | |
412 | src[I(x, y, z, D3Q19_C)] = pdf_C - omegaEven*(pdf_C - w_0*dir_indep_trm); | |
413 | ||
414 | // direction: w_1 | |
415 | w_1_indep = w_1*dir_indep_trm; | |
416 | ||
417 | ui = uy; | |
418 | evenPart = omegaEven*( 0.5*(pdf_N + pdf_S) - ui*ui*w_1_nine_half - w_1_indep ); | |
419 | oddPart = omegaOdd*(0.5*(pdf_N - pdf_S) - ui*w_1_x3 ); | |
420 | src[I(x, y + 1, z, D3Q19_N)] = pdf_N - evenPart - oddPart; | |
421 | src[I(x, y - 1, z, D3Q19_S)] = pdf_S - evenPart + oddPart; | |
422 | ||
423 | ui = ux; | |
424 | evenPart = omegaEven*( 0.5*(pdf_E + pdf_W) - ui*ui*w_1_nine_half - w_1_indep ); | |
425 | oddPart = omegaOdd*(0.5*(pdf_E - pdf_W) - ui*w_1_x3 ); | |
426 | src[I(x + 1, y, z, D3Q19_E)] = pdf_E - evenPart - oddPart; | |
427 | src[I(x - 1, y, z, D3Q19_W)] = pdf_W - evenPart + oddPart; | |
428 | ||
429 | ui = uz; | |
430 | evenPart = omegaEven*( 0.5*(pdf_T + pdf_B) - ui*ui*w_1_nine_half - w_1_indep ); | |
431 | oddPart = omegaOdd*(0.5*(pdf_T - pdf_B) - ui*w_1_x3 ); | |
432 | src[I(x, y, z + 1, D3Q19_T)] = pdf_T - evenPart - oddPart; | |
433 | src[I(x, y, z - 1, D3Q19_B)] = pdf_B - evenPart + oddPart; | |
434 | ||
435 | // direction: w_2 | |
436 | w_2_indep = w_2*dir_indep_trm; | |
437 | ||
438 | ui = -ux + uy; | |
439 | evenPart = omegaEven*( 0.5*(pdf_NW + pdf_SE) - ui*ui*w_2_nine_half - w_2_indep ); | |
440 | oddPart = omegaOdd*(0.5*(pdf_NW - pdf_SE) - ui*w_2_x3 ); | |
441 | src[I(x - 1, y + 1, z, D3Q19_NW)] = pdf_NW - evenPart - oddPart; | |
442 | src[I(x + 1, y - 1, z, D3Q19_SE)] = pdf_SE - evenPart + oddPart; | |
443 | ||
444 | ui = ux + uy; | |
445 | evenPart = omegaEven*( 0.5*(pdf_NE + pdf_SW) - ui*ui*w_2_nine_half - w_2_indep ); | |
446 | oddPart = omegaOdd*(0.5*(pdf_NE - pdf_SW) - ui*w_2_x3 ); | |
447 | src[I(x + 1, y + 1, z, D3Q19_NE)] = pdf_NE - evenPart - oddPart; | |
448 | src[I(x - 1, y - 1, z, D3Q19_SW)] = pdf_SW - evenPart + oddPart; | |
449 | ||
450 | ui = -ux + uz; | |
451 | evenPart = omegaEven*( 0.5*(pdf_TW + pdf_BE) - ui*ui*w_2_nine_half - w_2_indep ); | |
452 | oddPart = omegaOdd*(0.5*(pdf_TW - pdf_BE) - ui*w_2_x3 ); | |
453 | src[I(x - 1, y, z + 1, D3Q19_TW)] = pdf_TW - evenPart - oddPart; | |
454 | src[I(x + 1, y, z - 1, D3Q19_BE)] = pdf_BE - evenPart + oddPart; | |
455 | ||
456 | ui = ux + uz; | |
457 | evenPart = omegaEven*( 0.5*(pdf_TE + pdf_BW) - ui*ui*w_2_nine_half - w_2_indep ); | |
458 | oddPart = omegaOdd*(0.5*(pdf_TE - pdf_BW) - ui*w_2_x3 ); | |
459 | src[I(x + 1, y, z + 1, D3Q19_TE)] = pdf_TE - evenPart - oddPart; | |
460 | src[I(x - 1, y, z - 1, D3Q19_BW)] = pdf_BW - evenPart + oddPart; | |
461 | ||
462 | ui = -uy + uz; | |
463 | evenPart = omegaEven*( 0.5*(pdf_TS + pdf_BN) - ui*ui*w_2_nine_half - w_2_indep ); | |
464 | oddPart = omegaOdd*(0.5*(pdf_TS - pdf_BN) - ui*w_2_x3 ); | |
465 | src[I(x, y - 1, z + 1, D3Q19_TS)] = pdf_TS - evenPart - oddPart; | |
466 | src[I(x, y + 1, z - 1, D3Q19_BN)] = pdf_BN - evenPart + oddPart; | |
467 | ||
468 | ui = uy + uz; | |
469 | evenPart = omegaEven*( 0.5*(pdf_TN + pdf_BS) - ui*ui*w_2_nine_half - w_2_indep ); | |
470 | oddPart = omegaOdd*(0.5*(pdf_TN - pdf_BS) - ui*w_2_x3 ); | |
471 | src[I(x, y + 1, z + 1, D3Q19_TN)] = pdf_TN - evenPart - oddPart; | |
472 | src[I(x, y - 1, z - 1, D3Q19_BS)] = pdf_BS - evenPart + oddPart; | |
473 | ||
474 | ||
475 | #undef I | |
476 | } } } // z, y, x (from inner to outer) | |
477 | } } } // z, y, x (from inner to outer) | |
478 | } // loop over threads | |
479 | ||
480 | // }}} | |
481 | ||
482 | // Stop counters before bounce back. Else computing loop balance will be incorrect. | |
483 | ||
484 | X_LIKWID_STOP("aa-odd"); | |
485 | ||
486 | // Fixup bounce back PDFs. | |
487 | #ifdef _OPENMP | |
488 | #pragma omp parallel for default(none) \ | |
489 | shared(kd, src) | |
490 | #endif | |
491 | for (int i = 0; i < kd->nBounceBackPdfs; ++i) { | |
492 | src[kd->BounceBackPdfsDst[i]] = src[kd->BounceBackPdfsSrc[i]]; | |
493 | } | |
494 | ||
495 | // save current iteration | |
496 | kda->Iteration = iter + 1; | |
497 | ||
498 | #ifdef VERIFICATION | |
499 | kd->PdfsActive = src; | |
500 | KernelAddBodyForce(kd, ld, cd); | |
501 | #endif | |
502 | ||
503 | #ifdef VTK_OUTPUT | |
504 | if (cd->VtkOutput && (iter + 1 % cd->VtkModulus) == 0) { | |
505 | kd->PdfsActive = src; | |
506 | VtkWrite(ld, kd, cd, iter + 1); | |
507 | } | |
508 | #endif | |
509 | ||
510 | #ifdef STATISTICS | |
511 | kd->PdfsActive = src; | |
512 | KernelStatistics(kd, ld, cd, iter + 1); | |
513 | #endif // }}} | |
514 | ||
515 | ||
516 | } // for (int iter = 0; ... | |
517 | ||
518 | #ifdef VTK_OUTPUT | |
519 | ||
520 | if (cd->VtkOutput) { | |
521 | kd->PdfsActive = src; | |
522 | VtkWrite(ld, kd, cd, maxIterations); | |
523 | } | |
524 | ||
525 | #endif | |
526 | ||
527 | return; | |
528 | } | |
529 |