cavis/libnd4j/include/memory/cpu/Workspace.cpp

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2019-06-06 14:21:15 +02:00
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
//
// CPU workspaces implementation
//
// @author raver119@gmail.com
//
#include <op_boilerplate.h>
#include <atomic>
#include <stdio.h>
#include <stdlib.h>
#include "../Workspace.h"
#include <helpers/logger.h>
#include <templatemath.h>
#include <cstring>
namespace nd4j {
namespace memory {
Workspace::Workspace(ExternalWorkspace *external) {
if (external->sizeHost() > 0) {
_ptrHost = (char *) external->pointerHost();
_ptrDevice = (char *) external->pointerDevice();
_initialSize = external->sizeHost();
_currentSize = external->sizeHost();
_offset = 0L;
_offsetSecondary = 0L;
this->_cycleAllocations = 0;
this->_spillsSize = 0;
_externalized = true;
}
};
Workspace::Workspace(Nd4jLong initialSize, Nd4jLong secondaryBytes) {
if (initialSize > 0) {
this->_ptrHost = (char *) malloc(initialSize);
CHECK_ALLOC(this->_ptrHost, "Failed to allocate new workspace", initialSize);
memset(this->_ptrHost, 0, initialSize);
this->_allocatedHost = true;
} else
this->_allocatedHost = false;
this->_initialSize = initialSize;
this->_currentSize = initialSize;
this->_offset = 0;
this->_offsetSecondary = 0;
this->_cycleAllocations = 0;
this->_spillsSize = 0;
}
void Workspace::init(Nd4jLong bytes, Nd4jLong secondaryBytes) {
if (this->_currentSize < bytes) {
if (this->_allocatedHost && !_externalized)
free((void *)this->_ptrHost);
this->_ptrHost =(char *) malloc(bytes);
CHECK_ALLOC(this->_ptrHost, "Failed to allocate new workspace", bytes);
memset(this->_ptrHost, 0, bytes);
this->_currentSize = bytes;
this->_allocatedHost = true;
}
}
void Workspace::expandBy(Nd4jLong numBytes, Nd4jLong secondaryBytes) {
this->init(_currentSize + numBytes, _currentSizeSecondary + secondaryBytes);
}
void Workspace::expandTo(Nd4jLong numBytes, Nd4jLong secondaryBytes) {
this->init(numBytes, secondaryBytes);
}
void Workspace::freeSpills() {
_spillsSize = 0;
if (_spills.size() < 1)
return;
for (auto v:_spills)
free(v);
_spills.clear();
}
Workspace::~Workspace() {
if (this->_allocatedHost && !_externalized)
free((void *)this->_ptrHost);
freeSpills();
}
Nd4jLong Workspace::getUsedSize() {
return getCurrentOffset();
}
Nd4jLong Workspace::getCurrentSize() {
return _currentSize;
}
Nd4jLong Workspace::getCurrentOffset() {
return _offset.load();
}
void* Workspace::allocateBytes(Nd4jLong numBytes) {
if (numBytes < 1)
throw allocation_exception::build("Number of bytes for allocation should be positive", numBytes);
//numBytes += 32;
void* result = nullptr;
this->_cycleAllocations += numBytes;
this->_mutexAllocation.lock();
if (_offset.load() + numBytes > _currentSize) {
nd4j_debug("Allocating %lld bytes in spills\n", numBytes);
this->_mutexAllocation.unlock();
void *p = malloc(numBytes);
CHECK_ALLOC(p, "Failed to allocate new workspace", numBytes);
_mutexSpills.lock();
_spills.push_back(p);
_mutexSpills.unlock();
_spillsSize += numBytes;
return p;
}
result = (void *)(_ptrHost + _offset.load());
_offset += numBytes;
//memset(result, 0, (int) numBytes);
nd4j_debug("Allocating %lld bytes from workspace; Current PTR: %p; Current offset: %lld\n", numBytes, result, _offset.load());
this->_mutexAllocation.unlock();
return result;
}
Nd4jLong Workspace::getAllocatedSize() {
return getCurrentSize() + getSpilledSize();
}
void Workspace::scopeIn() {
freeSpills();
init(_cycleAllocations.load());
_cycleAllocations = 0;
}
void Workspace::scopeOut() {
_offset = 0;
_offsetSecondary = 0;
}
Nd4jLong Workspace::getSpilledSize() {
return _spillsSize.load();
}
void* Workspace::allocateBytes(nd4j::memory::MemoryType type, Nd4jLong numBytes) {
if (type == DEVICE)
throw std::runtime_error("CPU backend doesn't have device memory");
return this->allocateBytes(numBytes);
}
Nd4jLong Workspace::getAllocatedSecondarySize() {
return 0L;
}
Nd4jLong Workspace::getCurrentSecondarySize() {
return 0L;
}
Nd4jLong Workspace::getCurrentSecondaryOffset() {
return 0L;
}
Nd4jLong Workspace::getSpilledSecondarySize() {
return 0L;
}
Nd4jLong Workspace::getUsedSecondarySize() {
return 0L;
}
Workspace* Workspace::clone() {
// for clone we take whatever is higher: current allocated size, or allocated size of current loop
return new Workspace(nd4j::math::nd4j_max<Nd4jLong >(this->getCurrentSize(), this->_cycleAllocations.load()));
}
}
}