mirror of
https://github.com/blakeblackshear/frigate.git
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115 lines
4.2 KiB
C++
115 lines
4.2 KiB
C++
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <migraphx/analyze_streams.hpp>
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#include <migraphx/program.hpp>
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#include <migraphx/iterator_for.hpp>
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#include <migraphx/ranges.hpp>
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#include <migraphx/instruction.hpp>
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#include <migraphx/errors.hpp>
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namespace migraphx {
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inline namespace MIGRAPHX_INLINE_NS {
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bool happens_before(const std::vector<std::size_t>& e1, const std::vector<std::size_t>& e2)
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{
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return std::equal(e1.begin(), e1.end(), e2.begin(), e2.end(), std::less_equal<>{}) and
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not std::equal(e1.begin(), e1.end(), e2.begin(), e2.end(), std::greater_equal<>{});
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}
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std::vector<stream_race> analyze_streams(const module& m, const stream_model& strmm)
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{
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using vector_clock = std::vector<std::size_t>;
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std::vector<stream_race> races;
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auto nstream = strmm.get_nstream();
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std::vector<vector_clock> vclock(nstream, vector_clock(nstream));
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std::unordered_map<instruction_ref, vector_clock> timestamp;
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std::unordered_map<std::size_t, vector_clock> events;
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for(auto ins : iterator_for(m))
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{
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if(not strmm.has_stream(ins))
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continue;
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std::size_t s = strmm.get_stream(ins);
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assert(s < nstream);
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assert(vclock.size() == nstream);
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assert(vclock[s].size() == nstream);
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if(strmm.is_record(ins))
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{
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vclock[s][s]++;
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auto event = strmm.get_event_id(ins);
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events[event] = vclock[s];
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}
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else if(strmm.is_wait(ins))
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{
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auto event = strmm.get_event_id(ins);
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if(not contains(events, event))
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MIGRAPHX_THROW("Event is waited on before being recorded: " +
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std::to_string(event));
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auto payload = events.at(event);
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assert(vclock[s].size() == payload.size());
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std::transform(vclock[s].begin(),
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vclock[s].end(),
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payload.begin(),
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vclock[s].begin(),
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[&](auto x, auto y) { return std::max(x, y); });
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vclock[s][s]++;
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}
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else
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{
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vclock[s][s]++;
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}
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timestamp[ins] = vclock[s];
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}
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for(auto ins : iterator_for(m))
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{
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if(not strmm.has_stream(ins))
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continue;
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if(ins->inputs().empty())
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continue;
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std::size_t s = strmm.get_stream(ins);
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// Find inputs from different streams
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std::vector<instruction_ref> inputs;
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fix([&](auto self, auto start) {
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for(auto input : start->inputs())
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{
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if(not strmm.has_stream(input))
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self(input);
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else if(strmm.get_stream(input) != s)
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inputs.push_back(input);
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}
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})(ins);
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auto it = std::find_if(inputs.begin(), inputs.end(), [&](auto input) {
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return not happens_before(timestamp.at(input), timestamp.at(ins));
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});
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if(it != inputs.end())
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{
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races.push_back({ins, *it});
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}
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}
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return races;
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}
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} // namespace MIGRAPHX_INLINE_NS
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} // namespace migraphx
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