openmpi/ompi/mca/btl/usnic/btl_usnic_hwloc.h

/*
 * Copyright (c) 2013 Cisco Systems, Inc.  All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#ifndef BTL_USNIC_HWLOC_H
#define BTL_USNIC_HWLOC_H

#include "ompi_config.h"

#include "btl_usnic_module.h"


#if OPAL_HAVE_HWLOC
int ompi_btl_usnic_hwloc_distance(ompi_btl_usnic_module_t *module);
#endif

#endif /* BTL_USNIC_HWLOC_H */
First commit of the Cisco usNIC BTL. This BTL accesses the Cisco usNIC Linux device via the Linux verbs API via Unreliable Datagram queue pairs. A few noteworthy points: * This BTL does most of its own fragmentation; it tells the PML that it has a very high max_send_size (much higher than the network MTU). * Since UD fragments are, by definition, unreliable, the usnic BTL handles all of its own reliability via a sliding window approach using the opal_hotel construct and many tricks stolen from the corpus of knowledge surrounding efficient TCP. * There is a fun PML latency-metric based optimization for NUMA awareness of short messages. * Note that this is ''not'' a generic UD verbs BTL; it is specific to the Cisco usNIC device. This commit was SVN r28879. 2013-07-20 02:13:58 +04:00			`/*`
			`* Copyright (c) 2013 Cisco Systems, Inc. All rights reserved.`
			`* $COPYRIGHT$`
			`*`
			`* Additional copyrights may follow`
			`*`
			`* $HEADER$`
			`*/`

			`#ifndef BTL_USNIC_HWLOC_H`
			`#define BTL_USNIC_HWLOC_H`

			`#include "ompi_config.h"`

			`#include "btl_usnic_module.h"`


			`#if OPAL_HAVE_HWLOC`
			`int ompi_btl_usnic_hwloc_distance(ompi_btl_usnic_module_t *module);`
			`#endif`

			`#endif /* BTL_USNIC_HWLOC_H */`