1function test121 2%TEST121 performance tests for GrB_assign 3 4% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved. 5% SPDX-License-Identifier: Apache-2.0 6 7fprintf ('test121:---------------- C(I,J)+=A performance\n') ; 8 9[save save_chunk] = nthreads_get ; 10chunk = 4096 ; 11 12rng ('default') ; 13n = 1e6 ; 14k = n/10 ; 15 16% I.begin = 0 ; 17% I.inc = 1 ; 18% I.end = k-1 ; 19 I1 = randperm (k) ; 20 I0 = uint64 (I1) - 1 ; 21 22ncores = feature ('numcores') ; 23 24for dc = [ 0 1e-6 1e-5 1e-4 ] 25 26 C0 = sprandn (n, n, dc) ; 27 28 for da = [ 0 1e-6 1e-5 1e-4 1e-3 ] 29 30 A = sprandn (k, k, da) ; 31 32 % warmup 33 C1 = C0 ; 34 C1 (1:k,1:k) = C1 (1:k,1:k) + A ; 35 36 fprintf ('\n--------------------------------------\n') ; 37 fprintf ('dc = %g, da = %g\n', dc, da) ; 38 tic 39 C1 = C0 ; 40 % C1 (1:k,1:k) = C1 (1:k,1:k) + A ; 41 C1 (I1,I1) = C1 (I1,I1) + A ; 42 tm = toc ; 43 44 for nthreads = [1 2 4 8 16 20 32 40 64] 45 if (nthreads > 2*ncores) 46 break ; 47 end 48 nthreads_set (nthreads, chunk) ; 49 if (nthreads > 1 && t1 < 0.01) 50 continue ; 51 end 52 53 C2 = GB_mex_assign (C0, [ ], 'plus', A, I0, I0) ; 54 C2 = GB_mex_assign (C0, [ ], 'plus', A, I0, I0) ; 55 tg = grbresults ; 56 assert (isequal (C1, C2.matrix)) ; 57 if (nthreads == 1) 58 t1 = tg ; 59 end 60 61 fprintf ('%3d : MATLAB: %10.4f GB: %10.4f', nthreads, tm, tg) ; 62 fprintf (' speedup %10.4f %10.4f\n', t1/tg, tm / tg) ; 63 end 64 end 65end 66 67nthreads_set (save, save_chunk) ; 68