1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "FN_multi_function_parallel.hh"
#include "BLI_task.hh"
namespace blender::fn {
ParallelMultiFunction::ParallelMultiFunction(const MultiFunction &fn, const int64_t grain_size)
: fn_(fn), grain_size_(grain_size)
{
this->set_signature(&fn.signature());
threading_supported_ = true;
for (const int param_index : fn.param_indices()) {
const MFParamType param_type = fn.param_type(param_index);
if (param_type.data_type().category() == MFDataType::Vector) {
/* Vector parameters do not support threading yet. */
threading_supported_ = false;
break;
}
}
}
void ParallelMultiFunction::call(IndexMask full_mask, MFParams params, MFContext context) const
{
if (full_mask.size() <= grain_size_ || !threading_supported_) {
fn_.call(full_mask, params, context);
return;
}
threading::parallel_for(full_mask.index_range(), grain_size_, [&](const IndexRange mask_slice) {
Vector<int64_t> sub_mask_indices;
const IndexMask sub_mask = full_mask.slice_and_offset(mask_slice, sub_mask_indices);
if (sub_mask.is_empty()) {
return;
}
const int64_t input_slice_start = full_mask[mask_slice.first()];
const int64_t input_slice_size = full_mask[mask_slice.last()] - input_slice_start + 1;
const IndexRange input_slice_range{input_slice_start, input_slice_size};
MFParamsBuilder sub_params{fn_, sub_mask.min_array_size()};
ResourceScope &scope = sub_params.resource_scope();
/* All parameters are sliced so that the wrapped multi-function does not have to take care of
* the index offset. */
for (const int param_index : fn_.param_indices()) {
const MFParamType param_type = fn_.param_type(param_index);
switch (param_type.category()) {
case MFParamType::SingleInput: {
const GVArray &varray = params.readonly_single_input(param_index);
const GVArray &sliced_varray = scope.construct<GVArray_Slice>(varray, input_slice_range);
sub_params.add_readonly_single_input(sliced_varray);
break;
}
case MFParamType::SingleMutable: {
const GMutableSpan span = params.single_mutable(param_index);
const GMutableSpan sliced_span = span.slice(input_slice_start, input_slice_size);
sub_params.add_single_mutable(sliced_span);
break;
}
case MFParamType::SingleOutput: {
const GMutableSpan span = params.uninitialized_single_output(param_index);
const GMutableSpan sliced_span = span.slice(input_slice_start, input_slice_size);
sub_params.add_uninitialized_single_output(sliced_span);
break;
}
case MFParamType::VectorInput:
case MFParamType::VectorMutable:
case MFParamType::VectorOutput: {
BLI_assert_unreachable();
break;
}
}
}
fn_.call(sub_mask, sub_params, context);
});
}
} // namespace blender::fn
|
