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openmpi/ompi/mca/btl/self/btl_self.c
George Bosilca 6310ce955c The first patch related to the Active Message stuff. So far, here is what we have: 
- the registration array is now global instead of one by BTL.
- each framework have to declare the entries in the registration array reserved. Then
  it have to define the internal way of sharing (or not) these entries between all
  components. As an example, the PML will not share as there is only one active PML
  at any moment, while the BTLs will have to. The tag is 8 bits long, the first 3
  are reserved for the framework while the remaining 5 are use internally by each
  framework.
- The registration function is optional. If a BTL do not provide such function,
  nothing happens. However, in the case where such function is provided in the BTL
  structure, it will be called by the BML, when a tag is registered.

Now, it's time for the second step... Converting OB1 from a switch based PML to an
active message one.

This commit was SVN r17140.
2008-01-15 05:32:53 +00:00

410 строки
12 KiB
C
Исходник Ответственный История

/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 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.
* $COPYRIGHT$
*
* 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/threads/mutex.h"
#include "ompi/datatype/convertor.h"
#include "ompi/datatype/datatype.h"
#include "opal/sys/atomic.h"
#include "opal/util/output.h"
#include "opal/util/if.h"
#include "orte/util/proc_info.h"
#include "opal/util/printf.h"
#include "orte/util/sys_info.h"
#include "ompi/class/ompi_fifo.h"
#include "ompi/class/ompi_free_list.h"
#include "ompi/mca/pml/pml.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 = {
&mca_btl_self_component.super,
0, /* btl_eager_limit */
0, /* btl_rndv_eager_limit */
0, /* btl_max_send_size */
0, /* btl_rdma_pipeline_send_length */
0, /* btl_rdma_pipeline_frag_size */
0, /* btl_min_rdma_pipeline_size */
0, /* btl_exclusivity */
0, /* btl_latency */
0, /* btl_bandwidth */
0, /* btl flags */
mca_btl_self_add_procs,
mca_btl_self_del_procs,
NULL,
mca_btl_self_finalize,
mca_btl_self_alloc,
mca_btl_self_free,
mca_btl_self_prepare_src,
mca_btl_self_prepare_dst,
mca_btl_self_send,
mca_btl_self_rdma, /* put */
mca_btl_self_rdma, /* get */
mca_btl_base_dump,
NULL, /* mpool */
NULL, /* register error cb */
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,
ompi_bitmap_t* reachability )
{
int i;
for( i = 0; i < (int)nprocs; i++ ) {
if( procs[i] == ompi_proc_local_proc ) {
ompi_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;
int rc;
if(size <= mca_btl_self.btl_eager_limit) {
MCA_BTL_SELF_FRAG_ALLOC_EAGER(frag,rc);
frag->segment.seg_len = size;
} else if (size <= btl->btl_max_send_size) {
MCA_BTL_SELF_FRAG_ALLOC_SEND(frag,rc);
frag->segment.seg_len = size;
} else {
return NULL;
}
frag->base.des_flags = 0;
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 ompi_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( ompi_convertor_need_buffers(convertor) ||
max_data < mca_btl_self.btl_max_send_size ||
reserve != 0 ) {
MCA_BTL_SELF_FRAG_ALLOC_SEND(frag, rc);
if(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 = ompi_convertor_pack(convertor, &iov, &iov_count, &max_data );
if(rc < 0) {
MCA_BTL_SELF_FRAG_RETURN_SEND(frag);
return NULL;
}
frag->base.des_flags = 0;
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, rc);
if(NULL == frag) {
return NULL;
}
iov.iov_len = max_data;
iov.iov_base = NULL;
/* convertor should return offset into users buffer */
rc = ompi_convertor_pack(convertor, &iov, &iov_count, &max_data );
if(rc < 0) {
MCA_BTL_SELF_FRAG_RETURN_RDMA(frag);
return NULL;
}
frag->segment.seg_addr.pval = iov.iov_base;
frag->segment.seg_len = max_data;
frag->base.des_flags = 0;
*size = max_data;
}
frag->base.des_src = &frag->segment;
frag->base.des_src_cnt = 1;
frag->segment.seg_key.key64 = (uint64_t)(intptr_t)convertor;
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 ompi_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;
int rc;
MCA_BTL_SELF_FRAG_ALLOC_RDMA(frag, rc);
if(NULL == frag) {
return NULL;
}
/* setup descriptor to point directly to user buffer */
ompi_convertor_get_current_pointer( convertor, (void**)&(frag->segment.seg_addr.pval) );
frag->segment.seg_len = reserve + max_data;
frag->segment.seg_key.key64 = (uint64_t)(intptr_t)convertor;
frag->base.des_dst = &frag->segment;
frag->base.des_dst_cnt = 1;
frag->base.des_flags = 0;
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;
/**
* 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 */
des->des_cbfunc(btl,endpoint,des,OMPI_SUCCESS);
return OMPI_SUCCESS;
}
/**
* 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*)src->seg_addr.pval;
size_t src_len = src->seg_len;
unsigned char* dst_addr = (unsigned char*)ompi_ptr_ltop(dst->seg_addr.lval);
size_t dst_len = dst->seg_len;
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);
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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