diff options
author | morgolock <pablo.tello@arm.com> | 2020-08-20 14:51:39 +0100 |
---|---|---|
committer | Pablo Marquez <pablo.tello@arm.com> | 2020-08-25 13:17:09 +0000 |
commit | 5111264954e2d1a4d3e91d23a0869a0d7105be4c (patch) | |
tree | 57c8db6a8911378129364bc6d826a3c0ef7f9283 /src/runtime/SchedulerUtils.cpp | |
parent | 96a14008af85725d067cdd8247023474581102ea (diff) | |
download | ComputeLibrary-5111264954e2d1a4d3e91d23a0869a0d7105be4c.tar.gz |
COMPMID-3661: Added multidimension support to OMP scheduler.
Change-Id: Iedacf7094896f08d7c2847c8fb99bd7153deba2c
Signed-off-by: morgolock <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3809
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Diffstat (limited to 'src/runtime/SchedulerUtils.cpp')
-rw-r--r-- | src/runtime/SchedulerUtils.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/runtime/SchedulerUtils.cpp b/src/runtime/SchedulerUtils.cpp new file mode 100644 index 0000000000..1c12e3ce58 --- /dev/null +++ b/src/runtime/SchedulerUtils.cpp @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2020 Arm Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "arm_compute/core/Error.h" + +#include <cmath> + +namespace arm_compute +{ +#ifndef BARE_METAL +std::pair<unsigned, unsigned> split_2d(unsigned max_threads, std::size_t m, std::size_t n) +{ + /* + * We want the same ratio of threads in M & N to the ratio of m and n problem size + * + * Therefore: mt/nt == m/n where mt*nt == max_threads + * + * max_threads/nt = mt & (max_threads/nt) * (m/n) = nt + * nt^2 = max_threads * (m/n) + * nt = sqrt( max_threads * (m/n) ) + */ + //ratio of m to n in problem dimensions + double ratio = m / static_cast<double>(n); + + // nt = sqrt(max_threads * (m / n) ) + const unsigned adjusted = std::round( + std::sqrt(max_threads * ratio)); + + //find the nearest factor of max_threads + for(unsigned i = 0; i != adjusted; ++i) + { + //try down + const unsigned adj_down = adjusted - i; + if(max_threads % adj_down == 0) + { + return { adj_down, max_threads / adj_down }; + } + + //try up + const unsigned adj_up = adjusted + i; + if(max_threads % adj_up == 0) + { + return { adj_up, max_threads / adj_up }; + } + } + + //we didn't find anything so lets bail out with maxes biased to the largest dimension + if(m > n) + { + return { std::min<unsigned>(m, max_threads), 1 }; + } + else + { + return { 1, std::min<unsigned>(n, max_threads) }; + } +} +#endif /* #ifndef BARE_METAL */ +} // namespace arm_compute |