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function test122
%TEST122 performance tests for GrB_assign
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('test120:------------------- C(I,J)<!M> += A:\n') ;
[save save_chunk] = nthreads_get ;
chunk = 4096 ;
rng ('default') ;
n = 4000 ; ;
k = 3000 ;
% I0.begin = 0 ;
% I0.inc = 1 ;
% I0.end = k-1 ;
I1 = randperm (k) ;
I0 = uint64 (I1) - 1 ;
d.mask = 'complement' ;
ncores = feature_numcores ;
for dc = [2 0 1e-6 1e-5 1e-4 1e-3 1e-2 0.1 1]
if (dc == 2)
C0 = sparse (rand (n)) ;
else
C0 = sprand (n, n, dc) ;
end
for da = [2 0 1e-6 1e-5 1e-4 1e-3 1e-2 0.1 1]
if (da == 2)
A = sparse (rand (k)) ;
else
A = sprandn (k, k, da) ;
end
for dm = [2 0 1e-6 1e-5 1e-4 1e-3 1e-2 0.1 1]
if (dm == 2)
M = sparse (ones (k)) ;
else
M = spones (sprand (k, k, dm)) ;
end
Mbool = logical (M) ;
fprintf ('\n--------------------------------------\n') ;
fprintf ('dc = %g, dm = %g, da = %g\n', dc, dm, da) ;
% fprintf ('dc = %g nnz(C) %8.4f million\n', dc, nnz(C0)/1e6) ;
% fprintf ('dm = %g nnz(M) %8.4f million\n', dm, nnz(M)/1e6) ;
% fprintf ('da = %g nnz(A) %8.4f million\n', da, nnz(A)/1e6) ;
tm = inf ;
if (n < 500)
% built-in methods are exceedingly slow for this case
tic
C1 = C0 ;
% Csub = C1 (1:k, 1:k) ;
Csub = C1 (I1, I1) ;
Csub (~Mbool) = Csub (~Mbool) + A (~Mbool) ;
% C1 (1:k, 1:k) = Csub ;
C1 (I1, I1) = Csub ;
tm = toc ;
end
for nthreads = [1 2 4 8 16 20 32 40 64]
if (nthreads > 2*ncores)
break ;
end
if (nthreads > 1 && t1 < 0.01)
break ;
end
nthreads_set (nthreads, chunk) ;
C2 = GB_mex_subassign (C0, M, 'plus', A, I0, I0, d) ;
tic
C2 = GB_mex_subassign (C0, M, 'plus', A, I0, I0, d) ;
tg = toc ;
if (n < 500)
assert (isequal (C1, C2.matrix)) ;
end
if (nthreads == 1)
t1 = tg ;
end
fprintf ('%3d : builtin: %10.4f GB: %8.4f', nthreads, tm, tg) ;
fprintf (' speedup %10.4f %10.4f\n', tm / tg, t1/tg) ;
end
end
end
end
nthreads_set (save, save_chunk) ;
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