The crossbar network generates a network which connects all nodes with only two hops: those to and from the crossbar. More...

#include <crossbar.h>

Inheritance diagram for sstmac::hw::crossbar:

Collaboration diagram for sstmac::hw::crossbar:

Public Member Functions
virtual std::string	to_string () const

virtual	~crossbar ()

virtual void	init_factory_params (sprockit::sim_parameters *params)

int	diameter () const

int	ndimensions () const
	The number of distinct 'dimensions' in the topology. More...

int	ncoords () const

int	num_leaf_switches () const
	Structured topologies can be direct (torus) or indirect (fat tree). More...

virtual void	connect_objects (internal_connectable_map &switches)
	Given a set of connectables, connect them appropriately. More...

void	configure_vc_routing (std::map< routing::algorithm_t, int > &m) const

void	minimal_route_to_switch (switch_id current_sw_addr, switch_id dest_sw_addr, structured_routable::path &path) const
	Implementation of topology::minimal_route_to_switch. More...

void	minimal_route_to_coords (const coordinates &src_coords, const coordinates &dest_coords, structured_routable::path &path) const
	Workhorse function for implementing minimal_route_to_switch and #minimal_route_to_node. More...

int	minimal_distance (const coordinates &src_coords, const coordinates &dest_coords) const
	The function accepts either source or node coordinates. More...

virtual void	productive_path (int dim, const coordinates &src, const coordinates &dst, structured_routable::path &path) const

virtual int	convert_to_port (int dim, int dir) const

switch_id	switch_number (const coordinates &coords) const

virtual int	num_switches () const

Public Member Functions inherited from sstmac::hw::structured_topology
virtual	~structured_topology ()

virtual void	build_internal_connectables (internal_connectable_map &connectables, sprockit::factory< connectable > factory, partition part, int my_rank, sprockit::sim_parameters params, connectable dummy)

virtual void	build_endpoint_connectables (end_point_connectable_map &connectables, sprockit::factory< connectable > factory, partition part, int my_rank, sprockit::sim_parameters *params)

virtual void	build_interface_connectables (int conc, end_point_connectable_map &connectables, sprockit::factory2< connectable > nic_factory, partition part, int my_rank, sprockit::sim_parameters params, sprockit::factory_type interconnect)

virtual void	minimal_routes_to_coords (const coordinates &src_coords, const coordinates &dest_coords, structured_routable::path &current_path, structured_routable::path_set &paths) const

virtual int	endpoints_per_switch (switch_id addr) const
	Given a switch address, return number of nodes connected to it. More...

virtual int	num_nodes () const

virtual int	num_endpoints () const

coordinates	switch_coords (switch_id swid) const
	Compute coordinates (e.g. More...

virtual coordinates	node_coords (node_id nid) const
	Compute coordinates (e.g. More...

coordinates	endpoint_coords (node_id nid) const

virtual switch_id	endpoint_to_ejection_switch (node_id nodeaddr, int &switch_port) const

virtual switch_id	endpoint_to_injection_switch (node_id nodeaddr, int &switch_port) const

virtual int	endpoint_to_ejection_port (node_id addr) const

virtual int	endpoint_to_injection_port (node_id addr) const

virtual int	endpoint_to_switch_port (node_id nid) const

void	finalize_init ()

virtual void	productive_paths (structured_routable::path_set &paths, const coordinates &current, const coordinates &dst)

std::string	label (node_id nid) const

std::string	label (switch_id sid) const

virtual void	minimal_routes_to_switch (switch_id current_sw_addr, switch_id dest_sw_addr, structured_routable::path &current_path, structured_routable::path_set &paths) const

virtual void	eject_paths_on_switch (node_id dest_addr, switch_id sw_addr, structured_routable::path_set &paths) const

virtual int	num_hops_to_node (node_id src, node_id dst) const

virtual std::vector< node_id >	nodes_connected_to_injection_switch (switch_id swaddr) const

virtual std::vector< node_id >	nodes_connected_to_ejection_switch (switch_id swid) const

virtual coordinates	neighbor_at_port (switch_id sid, int port) const

virtual node_id	node_addr (const coordinates &coords) const

virtual node_id	node_addr (const coordinates &sw_coords, int port) const

virtual void	send_partners (traffic_pattern::type_t ty, node_id src_node, std::vector< node_id > &partners) const

virtual void	recv_partners (traffic_pattern::type_t ty, node_id src_node, std::vector< node_id > &partners) const

Protected Member Functions
virtual void	compute_switch_coords (switch_id uid, coordinates &coords) const
	Compute coordinates (e.g. More...

Protected Member Functions inherited from sstmac::hw::structured_topology
void	configure_injection_geometry (std::vector< int > &redundancies)

virtual std::vector< node_id >	nodes_connected_to_switch (switch_id swaddr) const

	structured_topology ()

void	partners (bool get_send_partner, traffic_pattern::type_t ty, node_id src, std::vector< node_id > &partner_list) const

virtual void	nearest_neighbor_partners (const coordinates &src_sw_coords, int port, std::vector< node_id > &partners) const

virtual void	tornado_recv_partners (const coordinates &src_sw_coords, int port, std::vector< node_id > &partners) const

virtual void	tornado_send_partners (const coordinates &src_sw_coords, int port, std::vector< node_id > &partners) const

virtual void	bit_complement_partners (const coordinates &src_sw_coords, int port, std::vector< node_id > &partners) const

Private Attributes
long	size_

Additional Inherited Members
Protected Attributes inherited from sstmac::hw::structured_topology
int	eject_geometric_id_

int	injection_redundancy_

bool	outputgraph_

Detailed Description

The crossbar network generates a network which connects all nodes with only two hops: those to and from the crossbar.

Definition at line 24 of file crossbar.h.

Constructor & Destructor Documentation

virtual sstmac::hw::crossbar::~crossbar ( )

inlinevirtual

Definition at line 32 of file crossbar.h.

References init_factory_params().

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Member Function Documentation

virtual void sstmac::hw::crossbar::compute_switch_coords	(	switch_id	swid,
		coordinates &	coords
	)		const

protectedvirtual

Compute coordinates (e.g.

X,Y,Z for 3D torus)

Parameters

swid	The unique index defining a switch location
coords	[inout] The unique coordinates of the switch

Implements sstmac::hw::structured_topology.

Referenced by num_switches().

void sstmac::hw::crossbar::configure_vc_routing ( std::map< routing::algorithm_t, int > & m ) const

Referenced by num_leaf_switches().

virtual void sstmac::hw::crossbar::connect_objects ( internal_connectable_map & objects )

virtual

Given a set of connectables, connect them appropriately.

Parameters

objects	The set of objects to connect
cloner	If in parallel mode, not all objects may exist. The factory creates missing objects.

Exceptions

value_error If invalid switchid is passed to cloner

Implements sstmac::hw::structured_topology.

Referenced by num_leaf_switches().

virtual int sstmac::hw::crossbar::convert_to_port	(	int	dim,
		int	dir
	)		const

virtual

Referenced by num_leaf_switches().

int sstmac::hw::crossbar::diameter ( ) const

inlinevirtual

Implements sstmac::hw::structured_topology.

Definition at line 38 of file crossbar.h.

virtual void sstmac::hw::crossbar::init_factory_params ( sprockit::sim_parameters * params )

virtual

Reimplemented from sstmac::hw::structured_topology.

Referenced by ~crossbar().

int sstmac::hw::crossbar::minimal_distance	(	const coordinates &	src_coords,
		const coordinates &	dest_coords
	)		const

virtual

The function accepts either source or node coordinates.

This gives the minimal distance counting the number of hops between switches. If node coordinates are given, the last coordinate is just ignored.

Parameters

src_coords.	The source coordinates. This can be either switch or node coordinates.
dest_coords.	The destination coordinates. This can be either switch or node coordinates.

Returns: The number of hops to final destination

Implements sstmac::hw::structured_topology.

Referenced by num_leaf_switches().

void sstmac::hw::crossbar::minimal_route_to_coords	(	const coordinates &	src_coords,
		const coordinates &	dest_coords,
		structured_routable::path &	path
	)		const

virtual

Workhorse function for implementing minimal_route_to_switch and #minimal_route_to_node.

Given source/dest coordinates, find the minimal path.

Parameters

current_sw_addr	The addr of the current switch
dest_sw_addr	The addr of the destination switch
path	[inout] A complete path descriptor to the destination switch

Implements sstmac::hw::structured_topology.

Referenced by num_leaf_switches().

void sstmac::hw::crossbar::minimal_route_to_switch	(	switch_id	current_sw_addr,
		switch_id	dest_sw_addr,
		structured_routable::path &	path
	)		const

virtual

Implementation of topology::minimal_route_to_switch.

For structured topologies, this basically just computes the coordinates of source, dest switch and calls minimal_route_to_coords.

Parameters

current_sw_addr	The addr of the current switch
dest_sw_addr	The addr of the destination switch
path	[inout] A complete path descriptor to the destination switch

Reimplemented from sstmac::hw::structured_topology.

Referenced by num_leaf_switches().

int sstmac::hw::crossbar::ncoords ( ) const

inline

Definition at line 48 of file crossbar.h.

int sstmac::hw::crossbar::ndimensions ( ) const

inlinevirtual

The number of distinct 'dimensions' in the topology.

This can correspond directly to standard X,Y,Z dimensions or the the number of levels in a fat tree. The keyword topology_redundant vector should have this many entries.

Implements sstmac::hw::structured_topology.

Definition at line 43 of file crossbar.h.

int sstmac::hw::crossbar::num_leaf_switches ( ) const

inlinevirtual

Structured topologies can be direct (torus) or indirect (fat tree).

We therefore need to distinguish the total number of switches and the number of leaf switches - i.e. those directly connected to nodes. For direct topologies, num_switches and num_leaf_switches are the same. For indirect, num_leaf_switches < num_switches.

Returns: The number of leaf switches directly connected to compute nodes

Implements sstmac::hw::structured_topology.

Definition at line 53 of file crossbar.h.

References configure_vc_routing(), connect_objects(), convert_to_port(), minimal_distance(), minimal_route_to_coords(), minimal_route_to_switch(), productive_path(), and size_.

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virtual int sstmac::hw::crossbar::num_switches ( ) const

inlinevirtual

Definition at line 97 of file crossbar.h.

References compute_switch_coords(), and size_.

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virtual void sstmac::hw::crossbar::productive_path	(	int	dim,
		const coordinates &	src,
		const coordinates &	dst,
		structured_routable::path &	path
	)		const

virtual

Parameters

dim	The dimension you want to move in. You might need to traverse other dimensions FIRST before you make progress on this dimension.
src	The coordinates of the source switch
dst	The coordinates of the dest switch
path	[inout] The path configuration for making progress on dim

Implements sstmac::hw::structured_topology.

Referenced by num_leaf_switches().

switch_id sstmac::hw::crossbar::switch_number ( const coordinates & coords ) const