-/* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef SIMGRID_MC_REGION_SNAPSHOT_HPP
#define SIMGRID_MC_REGION_SNAPSHOT_HPP
-#include <cstddef>
-#include <utility>
+#include "src/mc/remote/RemotePtr.hpp"
+#include "src/mc/sosp/ChunkedData.hpp"
#include <memory>
#include <vector>
-#include "xbt/base.h"
-
-#include "src/mc/AddressSpace.hpp"
-#include "src/mc/remote/RemotePtr.hpp"
-#include "src/mc/sosp/ChunkedData.hpp"
-#include "src/mc/sosp/PageStore.hpp"
-
namespace simgrid {
namespace mc {
enum class RegionType { Unknown = 0, Heap = 1, Data = 2 };
-enum class StorageType { NoData = 0, Flat = 1, Chunked = 2, Privatized = 3 };
-
-class Buffer {
-private:
- enum class Type { Malloc, Mmap };
- void* data_ = nullptr;
- std::size_t size_;
- Type type_ = Type::Malloc;
-
- Buffer(std::size_t size, Type type = Type::Malloc);
- Buffer(void* data, std::size_t size, Type type = Type::Malloc) : data_(data), size_(size), type_(type) {}
-
-public:
- Buffer() = default;
- void clear() noexcept;
- ~Buffer() noexcept { clear(); }
-
- static Buffer malloc(std::size_t size) { return Buffer(size, Type::Malloc); }
- static Buffer mmap(std::size_t size) { return Buffer(size, Type::Mmap); }
-
- // No copy
- Buffer(Buffer const& buffer) = delete;
- Buffer& operator=(Buffer const& buffer) = delete;
-
- // Move
- Buffer(Buffer&& that) noexcept : data_(that.data_), size_(that.size_), type_(that.type_)
- {
- that.data_ = nullptr;
- that.size_ = 0;
- that.type_ = Type::Malloc;
- }
- Buffer& operator=(Buffer&& that) noexcept
- {
- clear();
- data_ = that.data_;
- size_ = that.size_;
- type_ = that.type_;
- that.data_ = nullptr;
- that.size_ = 0;
- that.type_ = Type::Malloc;
- return *this;
- }
-
- void* get() { return data_; }
- const void* get() const { return data_; }
- std::size_t size() const { return size_; }
-};
-
-/** A copy/snapshot of a given memory region
- *
- * Different types of region snapshot storage types exist:
- *
- * * flat/dense snapshots are a simple copy of the region;
- *
- * * sparse/per-page snapshots are snaapshots which shared
- * identical pages.
- *
- * * privatized (SMPI global variable privatization).
- *
- * This is handled with a variant based approach:
- *
- * * `storage_type` identified the type of storage;
- *
- * * an anonymous enum is used to distinguish the relevant types for
- * each type.
- */
+/** A copy/snapshot of a given memory region, where identical pages are stored only once */
class RegionSnapshot {
public:
static const RegionType UnknownRegion = RegionType::Unknown;
static const RegionType HeapRegion = RegionType::Heap;
static const RegionType DataRegion = RegionType::Data;
-private:
- RegionType region_type_;
- StorageType storage_type_;
- simgrid::mc::ObjectInformation* object_info_;
+protected:
+ RegionType region_type_ = UnknownRegion;
+ simgrid::mc::ObjectInformation* object_info_ = nullptr;
/** @brief Virtual address of the region in the simulated process */
- void* start_addr_;
+ void* start_addr_ = nullptr;
/** @brief Size of the data region in bytes */
- std::size_t size_;
-
- /** @brief Permanent virtual address of the region
- *
- * This is usually the same address as the simuilated process address.
- * However, when using SMPI privatization of global variables,
- * each SMPI process has its own set of global variables stored
- * at a different virtual address. The scheduler maps those region
- * on the region of the global variables.
- *
- * */
- void* permanent_addr_;
-
- Buffer flat_data_;
- ChunkedData page_numbers_;
- std::vector<RegionSnapshot> privatized_regions_;
+ std::size_t size_ = 0;
+
+ ChunkedData chunks_;
public:
- RegionSnapshot()
- : region_type_(UnknownRegion)
- , storage_type_(StorageType::NoData)
- , object_info_(nullptr)
- , start_addr_(nullptr)
- , size_(0)
- , permanent_addr_(nullptr)
- {
- }
- RegionSnapshot(RegionType type, void* start_addr, void* permanent_addr, size_t size)
- : region_type_(type)
- , storage_type_(StorageType::NoData)
- , object_info_(nullptr)
- , start_addr_(start_addr)
- , size_(size)
- , permanent_addr_(permanent_addr)
- {
- }
+ RegionSnapshot(RegionType type, void* start_addr, size_t size);
~RegionSnapshot() = default;
- RegionSnapshot(RegionSnapshot const&) = default;
- RegionSnapshot& operator=(RegionSnapshot const&) = default;
+ RegionSnapshot(RegionSnapshot const&) = delete;
+ RegionSnapshot& operator=(RegionSnapshot const&) = delete;
RegionSnapshot(RegionSnapshot&& that)
: region_type_(that.region_type_)
- , storage_type_(that.storage_type_)
, object_info_(that.object_info_)
, start_addr_(that.start_addr_)
, size_(that.size_)
- , permanent_addr_(that.permanent_addr_)
- , flat_data_(std::move(that.flat_data_))
- , page_numbers_(std::move(that.page_numbers_))
- , privatized_regions_(std::move(that.privatized_regions_))
+ , chunks_(std::move(that.chunks_))
{
that.clear();
}
RegionSnapshot& operator=(RegionSnapshot&& that)
{
region_type_ = that.region_type_;
- storage_type_ = that.storage_type_;
object_info_ = that.object_info_;
start_addr_ = that.start_addr_;
size_ = that.size_;
- permanent_addr_ = that.permanent_addr_;
- flat_data_ = std::move(that.flat_data_);
- page_numbers_ = std::move(that.page_numbers_);
- privatized_regions_ = std::move(that.privatized_regions_);
+ chunks_ = std::move(that.chunks_);
that.clear();
return *this;
}
void clear()
{
region_type_ = UnknownRegion;
- storage_type_ = StorageType::NoData;
- privatized_regions_.clear();
- page_numbers_.clear();
- flat_data_.clear();
+ chunks_.clear();
object_info_ = nullptr;
start_addr_ = nullptr;
size_ = 0;
- permanent_addr_ = nullptr;
- }
-
- void clear_data()
- {
- storage_type_ = StorageType::NoData;
- flat_data_.clear();
- page_numbers_.clear();
- privatized_regions_.clear();
}
- void flat_data(Buffer data)
- {
- storage_type_ = StorageType::Flat;
- flat_data_ = std::move(data);
- page_numbers_.clear();
- privatized_regions_.clear();
- }
- const Buffer& flat_data() const { return flat_data_; }
- Buffer& flat_data() { return flat_data_; }
-
- void page_data(ChunkedData page_data)
- {
- storage_type_ = StorageType::Chunked;
- flat_data_.clear();
- page_numbers_ = std::move(page_data);
- privatized_regions_.clear();
- }
- ChunkedData const& page_data() const { return page_numbers_; }
-
- void privatized_data(std::vector<RegionSnapshot> data)
- {
- storage_type_ = StorageType::Privatized;
- flat_data_.clear();
- page_numbers_.clear();
- privatized_regions_ = std::move(data);
- }
- std::vector<RegionSnapshot> const& privatized_data() const { return privatized_regions_; }
- std::vector<RegionSnapshot>& privatized_data() { return privatized_regions_; }
+ ChunkedData const& get_chunks() const { return chunks_; }
simgrid::mc::ObjectInformation* object_info() const { return object_info_; }
void object_info(simgrid::mc::ObjectInformation* info) { object_info_ = info; }
RemotePtr<void> start() const { return remote(start_addr_); }
RemotePtr<void> end() const { return remote((char*)start_addr_ + size_); }
- RemotePtr<void> permanent_address() const { return remote(permanent_addr_); }
std::size_t size() const { return size_; }
- StorageType storage_type() const { return storage_type_; }
RegionType region_type() const { return region_type_; }
bool contain(RemotePtr<void> p) const { return p >= start() && p < end(); }
-};
-RegionSnapshot privatized_region(RegionType region_type, void* start_addr, void* permanent_addr, std::size_t size);
-RegionSnapshot dense_region(RegionType type, void* start_addr, void* data_addr, std::size_t size);
-simgrid::mc::RegionSnapshot sparse_region(RegionType type, void* start_addr, void* data_addr, std::size_t size);
-simgrid::mc::RegionSnapshot region(RegionType type, void* start_addr, void* data_addr, std::size_t size);
+ /** @brief Restore a region from a snapshot */
+ void restore();
+};
} // namespace mc
} // namespace simgrid
-typedef simgrid::mc::RegionSnapshot s_mc_mem_region_t;
-typedef s_mc_mem_region_t* mc_mem_region_t;
#endif
