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/*
* Copyright 2019 Xilinx Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "./device_scheduler_imp.hpp"
#include <glog/logging.h>
#include <algorithm>
#include <iostream>
#include <numeric>
using namespace std;
#include <vector>
namespace {
DeviceSchedulerImp::DeviceSchedulerImp(int count)
: DeviceScheduler(), busy_time_((size_t)count), mtx_{} {
CHECK_EQ(busy_time_.size(), (size_t)count);
LOG(INFO) << "name = null";
}
DeviceSchedulerImp::DeviceSchedulerImp(const char* name, int count)
: DeviceScheduler(), busy_time_((size_t)count), mtx_{} {
CHECK_EQ(busy_time_.size(), (size_t)count);
LOG(INFO) << "name = " << name;
}
int DeviceSchedulerImp::next() {
std::lock_guard<std::mutex> lock(mtx_);
auto it = std::min_element(busy_time_.begin(), busy_time_.end());
CHECK(it != busy_time_.end());
auto v = *it;
// try to avoid round trip
for (auto& x : busy_time_) {
x = x - v;
}
*it = (*it) + 1;
int ret = (int) std::distance(busy_time_.begin(), it);
return ret;
}
void DeviceSchedulerImp::mark_busy_time(int device_id, int time) {
std::lock_guard<std::mutex> lock(mtx_);
CHECK_GE(busy_time_[device_id], 0);
busy_time_[device_id] = busy_time_[device_id] + time;
CHECK_GE(busy_time_[device_id], 0);
}
void DeviceSchedulerImp::initialize() {
c = c + 1;
if (c != 1) {
std::cerr << __FILE__ << ":" << __LINE__ << ": [" << __FUNCTION__ << "]" //
<< "error! initialize twice";
abort();
}
}
} // namespace
DECLARE_INJECTION(vart::dpu::DeviceScheduler, DeviceSchedulerImp, //
int&&);
DECLARE_INJECTION(vart::dpu::DeviceScheduler, DeviceSchedulerImp, //
const char*&&, int&&);
DECLARE_INJECTION_IN_SHARED_LIB(vart::dpu::DeviceScheduler,
DeviceSchedulerImp, //
const char*&&, int&&);
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