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openmpi/ompi/mca/btl/self/btl_self.c
Nathan Hjelm ccb33ff811 btl: Use C99 sub-object naming when initializing BTL components 
Two things to note:

 - This change will allow us to expand the BTL interface without
   having to worry about modifying BTLs that will not support the new
   interfaces. More on this will come later this year as part of the
   1.9 series.

 - C99 guarantees that uninitialed members of structs declared outside
   of functions (DATA binary section) will be initialized with
   0's. This allows us to drop stuff like .btl_flags = 0, or .btl_get
   = NULL.

This commit was SVN r31388.
2014-04-14 19:29:26 +00:00

401 строка
12 KiB
C
Исходник Ответственный История

/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 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) 2014 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "opal/class/opal_bitmap.h"
#include "opal/datatype/opal_convertor.h"
#include "opal/sys/atomic.h"
#include "ompi/mca/btl/btl.h"
#include "ompi/mca/mpool/base/base.h"
#include "btl_self.h"
#include "btl_self_frag.h"
#include "ompi/proc/proc.h"
mca_btl_base_module_t mca_btl_self = {
.btl_component = &mca_btl_self_component.super,
.btl_add_procs = mca_btl_self_add_procs,
.btl_del_procs = mca_btl_self_del_procs,
.btl_finalize = mca_btl_self_finalize,
.btl_alloc = mca_btl_self_alloc,
.btl_free = mca_btl_self_free,
.btl_prepare_src = mca_btl_self_prepare_src,
.btl_prepare_dst = mca_btl_self_prepare_dst,
.btl_send = mca_btl_self_send,
.btl_put = mca_btl_self_rdma,
.btl_get = mca_btl_self_rdma,
.btl_dump = mca_btl_base_dump,
.btl_ft_event = mca_btl_self_ft_event,
};
int mca_btl_self_add_procs( struct mca_btl_base_module_t* btl,
size_t nprocs,
struct ompi_proc_t **procs,
struct mca_btl_base_endpoint_t **peers,
opal_bitmap_t* reachability )
{
int i;
for( i = 0; i < (int)nprocs; i++ ) {
if( procs[i] == ompi_proc_local_proc ) {
opal_bitmap_set_bit( reachability, i );
break; /* there will always be only one ... */
}
}
return OMPI_SUCCESS;
}
int mca_btl_self_del_procs( struct mca_btl_base_module_t* btl,
size_t nprocs,
struct ompi_proc_t **procs,
struct mca_btl_base_endpoint_t **peers )
{
return OMPI_SUCCESS;
}
/**
* MCA->BTL Clean up any resources held by BTL module
* before the module is unloaded.
*
* @param btl (IN) BTL module.
*
* Prior to unloading a BTL module, the MCA framework will call
* the BTL finalize method of the module. Any resources held by
* the BTL should be released and if required the memory corresponding
* to the BTL module freed.
*
*/
int mca_btl_self_finalize(struct mca_btl_base_module_t* btl)
{
return OMPI_SUCCESS;
}
/**
* Allocate a segment.
*
* @param btl (IN) BTL module
* @param size (IN) Request segment size.
*/
mca_btl_base_descriptor_t* mca_btl_self_alloc(
struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
uint8_t order,
size_t size,
uint32_t flags)
{
mca_btl_self_frag_t* frag = NULL;
if(size <= mca_btl_self.btl_eager_limit) {
MCA_BTL_SELF_FRAG_ALLOC_EAGER(frag);
} else if (size <= btl->btl_max_send_size) {
MCA_BTL_SELF_FRAG_ALLOC_SEND(frag);
}
if( OPAL_UNLIKELY(NULL == frag) ) {
return NULL;
}
frag->segment.seg_len = size;
frag->base.des_flags = flags;
frag->base.des_src = &(frag->segment);
frag->base.des_src_cnt = 1;
return (mca_btl_base_descriptor_t*)frag;
}
/**
* Return a segment allocated by this BTL.
*
* @param btl (IN) BTL module
* @param segment (IN) Allocated segment.
*/
int mca_btl_self_free( struct mca_btl_base_module_t* btl,
mca_btl_base_descriptor_t* des )
{
mca_btl_self_frag_t* frag = (mca_btl_self_frag_t*)des;
frag->base.des_src = NULL;
frag->base.des_src_cnt = 0;
frag->base.des_dst = NULL;
frag->base.des_dst_cnt = 0;
if(frag->size == mca_btl_self.btl_eager_limit) {
MCA_BTL_SELF_FRAG_RETURN_EAGER(frag);
} else if (frag->size == mca_btl_self.btl_max_send_size) {
MCA_BTL_SELF_FRAG_RETURN_SEND(frag);
} else {
MCA_BTL_SELF_FRAG_RETURN_RDMA(frag);
}
return OMPI_SUCCESS;
}
/**
* Prepare data for send/put
*
* @param btl (IN) BTL module
*/
struct mca_btl_base_descriptor_t*
mca_btl_self_prepare_src( struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
mca_mpool_base_registration_t* registration,
struct opal_convertor_t* convertor,
uint8_t order,
size_t reserve,
size_t* size,
uint32_t flags )
{
mca_btl_self_frag_t* frag;
struct iovec iov;
uint32_t iov_count = 1;
size_t max_data = *size;
int rc;
/* non-contigous data */
if( opal_convertor_need_buffers(convertor) ||
max_data < mca_btl_self.btl_max_send_size ||
reserve != 0 ) {
MCA_BTL_SELF_FRAG_ALLOC_SEND(frag);
if(OPAL_UNLIKELY(NULL == frag)) {
return NULL;
}
if(reserve + max_data > frag->size) {
max_data = frag->size - reserve;
}
iov.iov_len = max_data;
iov.iov_base = (IOVBASE_TYPE*)((unsigned char*)(frag+1) + reserve);
rc = opal_convertor_pack(convertor, &iov, &iov_count, &max_data );
if(rc < 0) {
MCA_BTL_SELF_FRAG_RETURN_SEND(frag);
return NULL;
}
frag->segment.seg_addr.pval = frag+1;
frag->segment.seg_len = reserve + max_data;
*size = max_data;
} else {
MCA_BTL_SELF_FRAG_ALLOC_RDMA(frag);
if(OPAL_UNLIKELY(NULL == frag)) {
return NULL;
}
iov.iov_len = max_data;
iov.iov_base = NULL;
/* convertor should return offset into users buffer */
rc = opal_convertor_pack(convertor, &iov, &iov_count, &max_data );
if(rc < 0) {
MCA_BTL_SELF_FRAG_RETURN_RDMA(frag);
return NULL;
}
frag->segment.seg_addr.lval = (uint64_t)(uintptr_t) iov.iov_base;
frag->segment.seg_len = max_data;
*size = max_data;
}
frag->base.des_flags = flags;
frag->base.des_src = &frag->segment;
frag->base.des_src_cnt = 1;
return &frag->base;
}
/**
* Prepare data for receive.
*/
struct mca_btl_base_descriptor_t*
mca_btl_self_prepare_dst( struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
mca_mpool_base_registration_t* registration,
struct opal_convertor_t* convertor,
uint8_t order,
size_t reserve,
size_t* size,
uint32_t flags )
{
mca_btl_self_frag_t* frag;
size_t max_data = *size;
void *ptr;
MCA_BTL_SELF_FRAG_ALLOC_RDMA(frag);
if(OPAL_UNLIKELY(NULL == frag)) {
return NULL;
}
/* setup descriptor to point directly to user buffer */
opal_convertor_get_current_pointer( convertor, &ptr );
frag->segment.seg_addr.lval = (uint64_t)(uintptr_t) ptr;
frag->segment.seg_len = reserve + max_data;
frag->base.des_dst = &frag->segment;
frag->base.des_dst_cnt = 1;
frag->base.des_flags = flags;
return &frag->base;
}
/**
* Initiate a send to the peer.
*
* @param btl (IN) BTL module
* @param peer (IN) BTL peer addressing
*/
int mca_btl_self_send( struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
struct mca_btl_base_descriptor_t* des,
mca_btl_base_tag_t tag )
{
mca_btl_active_message_callback_t* reg;
int btl_ownership = (des->des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
/**
* We have to set the dst before the call to the function and reset them
* after.
*/
des->des_dst = des->des_src;
des->des_dst_cnt = des->des_src_cnt;
/* upcall */
reg = mca_btl_base_active_message_trigger + tag;
reg->cbfunc( btl, tag, des, reg->cbdata );
des->des_dst = NULL;
des->des_dst_cnt = 0;
/* send completion */
if( des->des_flags & MCA_BTL_DES_SEND_ALWAYS_CALLBACK ) {
des->des_cbfunc( btl, endpoint, des, OMPI_SUCCESS );
}
if( btl_ownership ) {
mca_btl_self_free( btl, des );
}
return 1;
}
/**
* Initiate a put to the peer.
*
* @param btl (IN) BTL module
* @param peer (IN) BTL peer addressing
*/
int mca_btl_self_rdma( struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
struct mca_btl_base_descriptor_t* des )
{
mca_btl_base_segment_t* src = des->des_src;
mca_btl_base_segment_t* dst = des->des_dst;
size_t src_cnt = des->des_src_cnt;
size_t dst_cnt = des->des_dst_cnt;
unsigned char* src_addr = (unsigned char *)(uintptr_t) src->seg_addr.lval;
size_t src_len = src->seg_len;
unsigned char* dst_addr = (unsigned char *)(uintptr_t) dst->seg_addr.lval;
size_t dst_len = dst->seg_len;
int btl_ownership = (des->des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
while(src_len && dst_len) {
if(src_len == dst_len) {
memcpy(dst_addr, src_addr, src_len);
/* advance src */
if(--src_cnt != 0) {
src++;
src_addr = (unsigned char*)src->seg_addr.pval;
src_len = src->seg_len;
} else {
src_len = 0;
}
/* advance dst */
if(--dst_cnt != 0) {
dst++;
dst_addr = (unsigned char*)dst->seg_addr.pval;
dst_len = dst->seg_len;
} else {
dst_len = 0;
}
} else {
size_t bytes = src_len < dst_len ? src_len : dst_len;
memcpy(dst_addr, src_addr, bytes);
/* advance src */
src_len -= bytes;
if(src_len == 0) {
if(--src_cnt != 0) {
src++;
src_addr = (unsigned char*)src->seg_addr.pval;
src_len = src->seg_len;
}
} else {
src_addr += bytes;
}
/* advance dst */
dst_len -= bytes;
if(dst_len == 0) {
if(--dst_cnt != 0) {
dst++;
dst_addr = (unsigned char*)src->seg_addr.pval;
dst_len = src->seg_len;
}
} else {
dst_addr += bytes;
}
}
}
/* rdma completion */
des->des_cbfunc( btl, endpoint, des, OMPI_SUCCESS );
if( btl_ownership ) {
mca_btl_self_free( btl, des );
}
return OMPI_SUCCESS;
}
int mca_btl_self_ft_event(int state) {
if(OPAL_CRS_CHECKPOINT == state) {
;
}
else if(OPAL_CRS_CONTINUE == state) {
;
}
else if(OPAL_CRS_RESTART == state) {
;
}
else if(OPAL_CRS_TERM == state ) {
;
}
else {
;
}
return OMPI_SUCCESS;
}
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