portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2024-11-10 07:55:35 +00:00
Code Releases Activity

Use mmap

Browse Source
This commit is contained in:
Peter Boyle 2017-08-19 12:53:18 -04:00
parent 9e658de238
commit d6472eda8d
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/communicator/Communicator_base.cc
View File

@ -26,6 +26,10 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
*************************************************************************************/
/* END LEGAL */
#include <Grid/GridCore.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <sys/mman.h>
namespace Grid {
@ -129,8 +133,15 @@ void *CartesianCommunicator::ShmBufferTranslate(int rank,void * local_p) {
return NULL;
}
void CartesianCommunicator::ShmInitGeneric(void){
#if 1
ShmCommBuf =(void *) mmap(NULL, MAX_MPI_SHM_BYTES, PROT_READ | PROT_WRITE, MAP_HUGETLB| MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (ShmCommBuf == (void *)MAP_FAILED) exit(EXIT_FAILURE);
std::cout << "ShmCommBuf "<<ShmCommBuf<<std::endl;
#else
ShmBufStorageVector.resize(MAX_MPI_SHM_BYTES);
ShmCommBuf=(void *)&ShmBufStorageVector[0];
#endif
bzero(ShmCommBuf,MAX_MPI_SHM_BYTES);
}
#endif