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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/network/Network.hh"
#include "mem/ruby/system/RubySystem.hh"
class MessageBuffer;
class Switch;
class Throttle : public Consumer
{
public:
Throttle(int sID, RubySystem *rs, NodeID node, Cycles link_latency,
int link_bandwidth_multiplier, int endpoint_bandwidth,
Switch *em);
~Throttle() {}
std::string name()
{ return csprintf("Throttle-%i", m_switch_id); }
void addLinks(const std::vector<MessageBuffer*>& in_vec,
const std::vector<MessageBuffer*>& out_vec);
void wakeup();
// The average utilization (a fraction) since last clearStats()
const Stats::Scalar & getUtilization() const
{ return m_link_utilization; }
const Stats::Vector & getMsgCount(unsigned int type) const
{ return m_msg_counts[type]; }
int getLinkBandwidth() const
{ return m_endpoint_bandwidth * m_link_bandwidth_multiplier; }
Cycles getLatency() const { return m_link_latency; }
void clearStats();
void collateStats();
void regStats(std::string name);
void print(std::ostream& out) const;
private:
void init(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
int endpoint_bandwidth);
void operateVnet(int vnet, int &bw_remainin, bool &schedule_wakeup,
MessageBuffer *in, MessageBuffer *out);
// 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;
unsigned int m_vnets;
std::vector<int> m_units_remaining;
const int m_switch_id;
Switch *m_switch;
NodeID m_node;
int m_link_bandwidth_multiplier;
Cycles m_link_latency;
int m_wakeups_wo_switch;
int m_endpoint_bandwidth;
RubySystem *m_ruby_system;
// Statistical variables
Stats::Scalar m_link_utilization;
Stats::Vector m_msg_counts[MessageSizeType_NUM];
Stats::Formula m_msg_bytes[MessageSizeType_NUM];
double m_link_utilization_proxy;
};
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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