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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2016 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2019 University of Houston. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "opal/datatype/opal_convertor.h"
#include "opal/datatype/opal_datatype_cuda.h"
#include "opal/mca/common/cuda/common_cuda.h"
#include "opal/util/sys_limits.h"
#include "opal/mca/allocator/allocator.h"
#include "opal/mca/allocator/base/base.h"
#include "common_ompio.h"
#include "common_ompio_buffer.h"
static opal_mutex_t mca_common_ompio_buffer_mutex; /* lock for thread safety */
static mca_allocator_base_component_t* mca_common_ompio_allocator_component=NULL;
static mca_allocator_base_module_t* mca_common_ompio_allocator=NULL;
//static opal_atomic_int32_t mca_common_ompio_buffer_init = 0;
static int32_t mca_common_ompio_buffer_init = 0;
static int32_t mca_common_ompio_pagesize=4096;
static void* mca_common_ompio_buffer_alloc_seg ( void *ctx, size_t *size );
static void mca_common_ompio_buffer_free_seg ( void *ctx, void *buf );
#if OPAL_CUDA_SUPPORT
void mca_common_ompio_check_gpu_buf ( ompio_file_t *fh, const void *buf, int *is_gpu,
int *is_managed)
{
opal_convertor_t convertor;
*is_gpu=0;
*is_managed=0;
convertor.flags=0;
if ( opal_cuda_check_one_buf ( (char *)buf, &convertor ) ) {
*is_gpu = 1;
if ( convertor.flags & CONVERTOR_CUDA_UNIFIED ){
*is_managed =1;
}
}
return;
}
#endif
static void* mca_common_ompio_buffer_alloc_seg ( void*ctx, size_t *size )
{
char *buf=NULL;
size_t realsize, numpages;
numpages = (*size + mca_common_ompio_pagesize -1 )/mca_common_ompio_pagesize;
realsize = numpages * mca_common_ompio_pagesize;
buf = malloc ( realsize);
#if OPAL_CUDA_SUPPORT
if ( NULL != buf ) {
mca_common_cuda_register ( ( char *)buf, realsize, NULL );
}
#endif
*size = realsize;
return buf;
}
static void mca_common_ompio_buffer_free_seg ( void *ctx, void *buf )
{
if ( NULL != buf ) {
#if OPAL_CUDA_SUPPORT
mca_common_cuda_unregister ( (char *) buf, NULL );
#endif
free ( buf );
}
return;
}
int mca_common_ompio_buffer_alloc_init ( void )
{
bool thread_safe=true;
if(OPAL_THREAD_ADD_FETCH32(&mca_common_ompio_buffer_init, 1) > 1)
return OMPI_SUCCESS;
/* initialize static objects */
OBJ_CONSTRUCT(&mca_common_ompio_buffer_mutex, opal_mutex_t);
OPAL_THREAD_LOCK (&mca_common_ompio_buffer_mutex );
/* lookup name of the allocator to use */
if(NULL == (mca_common_ompio_allocator_component = mca_allocator_component_lookup("basic"))) {
OPAL_THREAD_UNLOCK(&mca_common_ompio_buffer_mutex);
return OMPI_ERR_BUFFER;
}
/* create an instance of the allocator */
mca_common_ompio_allocator = mca_common_ompio_allocator_component->allocator_init(thread_safe,
mca_common_ompio_buffer_alloc_seg,
mca_common_ompio_buffer_free_seg,
NULL);
if(NULL == mca_common_ompio_allocator) {
OPAL_THREAD_UNLOCK(&mca_common_ompio_buffer_mutex);
return OMPI_ERR_BUFFER;
}
mca_common_ompio_pagesize = opal_getpagesize();
OPAL_THREAD_UNLOCK(&mca_common_ompio_buffer_mutex);
return OMPI_SUCCESS;
}
int mca_common_ompio_buffer_alloc_fini ( void )
{
if ( NULL != mca_common_ompio_allocator ) {
OPAL_THREAD_LOCK (&mca_common_ompio_buffer_mutex);
mca_common_ompio_allocator->alc_finalize(mca_common_ompio_allocator);
mca_common_ompio_allocator=NULL;
OPAL_THREAD_UNLOCK (&mca_common_ompio_buffer_mutex);
OBJ_DESTRUCT (&mca_common_ompio_buffer_mutex);
}
return OMPI_SUCCESS;
}
void *mca_common_ompio_alloc_buf ( ompio_file_t *fh, size_t bufsize )
{
char *tmp=NULL;
if ( !mca_common_ompio_buffer_init ){
mca_common_ompio_buffer_alloc_init ();
}
OPAL_THREAD_LOCK (&mca_common_ompio_buffer_mutex);
tmp = mca_common_ompio_allocator->alc_alloc (mca_common_ompio_allocator,
bufsize, 0 );
OPAL_THREAD_UNLOCK (&mca_common_ompio_buffer_mutex);
return tmp;
}
void mca_common_ompio_release_buf ( ompio_file_t *fh, void *buf )
{
if ( !mca_common_ompio_buffer_init ){
/* Should not happen. You can not release a buf without
** having it allocated first.
*/
opal_output (1, "error in mca_common_ompio_release_buf: allocator not initialized\n");
}
OPAL_THREAD_LOCK (&mca_common_ompio_buffer_mutex);
mca_common_ompio_allocator->alc_free (mca_common_ompio_allocator,
buf);
OPAL_THREAD_UNLOCK (&mca_common_ompio_buffer_mutex);
return;
}
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