#include <memrdma.h>
Inheritance diagram for sc::RDMAMemoryGrp:
Public Member Functions | |
RDMAMemoryGrp (const Ref< MessageGrp > &msg) | |
RDMAMemoryGrp (const Ref< KeyVal > &) | |
void * | localdata () |
Returns a pointer to the local data. | |
void | set_localsize (size_t localsize) |
Set the size of locally held memory. | |
void * | obtain_writeonly (distsize_t offset, int size) |
This gives write access to the memory location. No locking is done. | |
void * | obtain_readwrite (distsize_t offset, int size) |
Only one thread can have an unreleased obtain_readwrite at a time. | |
void * | obtain_readonly (distsize_t offset, int size) |
This gives read access to the memory location. No locking is done. | |
void | release_readonly (void *data, distsize_t offset, int size) |
This is called when read access is no longer needed. | |
void | release_writeonly (void *data, distsize_t offset, int size) |
This is called when write access is no longer needed. | |
void | release_readwrite (void *data, distsize_t offset, int size) |
This is called when read/write access is no longer needed. | |
void | sum_reduction (double *data, distsize_t doffset, int dsize) |
void | sum_reduction_on_node (double *data, size_t doffset, int dsize, int node=-1) |
void | print (std::ostream &o=ExEnv::out0()) const |
Prints out information about the object. | |
Protected Member Functions | |
virtual void | retrieve_data (void *, int node, int offset, int size, int lock)=0 |
virtual void | replace_data (void *, int node, int offset, int size, int unlock)=0 |
virtual void | sum_data (double *data, int node, int doffset, int dsize)=0 |
void * | malloc_region (size_t nbyte) |
void | free_region (void *) |
Protected Attributes | |
char * | data_ |
std::vector< Pool * > | pools_ |
size_t | default_pool_size_ |
It uses RDMA to implement global shared memory.
void sc::RDMAMemoryGrp::set_localsize | ( | size_t | ) | [virtual] |
Set the size of locally held memory.
When memory is accessed using a global offset counting starts at node 0 and proceeds up to node n() - 1.
Reimplemented from sc::MsgMemoryGrp.
Reimplemented in sc::ARMCIMemoryGrp.
void* sc::RDMAMemoryGrp::obtain_readwrite | ( | distsize_t | offset, | |
int | size | |||
) | [virtual] |
Only one thread can have an unreleased obtain_readwrite at a time.
The actual memory region locked can be larger than that requested. If the memory region is already locked this will block. For this reason, data should be held as read/write for as short a time as possible.
Implements sc::MemoryGrp.
void sc::RDMAMemoryGrp::release_readwrite | ( | void * | data, | |
distsize_t | offset, | |||
int | size | |||
) | [virtual] |
This is called when read/write access is no longer needed.
The memory will be unlocked.
Implements sc::MemoryGrp.