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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* The class to implement bandwidth and latency throttle. An instance
* of consumer class that can be woke up. It is only used to control
* bandwidth at output port of a switch. And the throttle is added
* *after* the output port, means the message is put in the output
* port of the PerfectSwitch (a intermediateBuffers) first, then go
* through the Throttle.
*/
#ifndef __MEM_RUBY_NETWORK_SIMPLE_THROTTLE_HH__
#define __MEM_RUBY_NETWORK_SIMPLE_THROTTLE_HH__
#include <iostream>
#include <string>
#include <vector>
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/common/Global.hh"
#include "mem/ruby/network/Network.hh"
#include "mem/ruby/system/System.hh"
class MessageBuffer;
class Throttle : public Consumer
{
public:
Throttle(int sID, NodeID node, Cycles link_latency,
int link_bandwidth_multiplier, int endpoint_bandwidth,
ClockedObject *em);
Throttle(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
int endpoint_bandwidth, ClockedObject *em);
~Throttle() {}
std::string name()
{ return csprintf("Throttle-%i", m_sID); }
void addLinks(const std::vector<MessageBuffer*>& in_vec,
const std::vector<MessageBuffer*>& out_vec, ClockedObject *em);
void wakeup();
void printStats(std::ostream& out) const;
void clearStats();
// The average utilization (a percent) since last clearStats()
double getUtilization() const;
int getLinkBandwidth() const
{ return m_endpoint_bandwidth * m_link_bandwidth_multiplier; }
Cycles getLatency() const { return m_link_latency; }
const std::vector<std::vector<int> >&
getCounters() const
{
return m_message_counters;
}
void clear();
void print(std::ostream& out) const;
private:
void init(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
int endpoint_bandwidth);
void addVirtualNetwork(MessageBuffer* in_ptr, MessageBuffer* out_ptr,
ClockedObject *em);
void linkUtilized(double ratio) { m_links_utilized += ratio; }
// Private copy constructor and assignment operator
Throttle(const Throttle& obj);
Throttle& operator=(const Throttle& obj);
std::vector<MessageBuffer*> m_in;
std::vector<MessageBuffer*> m_out;
std::vector<std::vector<int> > m_message_counters;
int m_vnets;
std::vector<int> m_units_remaining;
int m_sID;
NodeID m_node;
int m_link_bandwidth_multiplier;
Cycles m_link_latency;
int m_wakeups_wo_switch;
int m_endpoint_bandwidth;
// For tracking utilization
Cycles m_ruby_start;
double m_links_utilized;
};
inline std::ostream&
operator<<(std::ostream& out, const Throttle& obj)
{
obj.print(out);
out << std::flush;
return out;
}
#endif // __MEM_RUBY_NETWORK_SIMPLE_THROTTLE_HH__
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