1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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47#include "mem/ruby/network/Network.hh"
48#include "mem/ruby/system/System.hh"
49
50class MessageBuffer;
51
52class Throttle : public Consumer
53{
54 public:
55 Throttle(int sID, NodeID node, Cycles link_latency,
56 int link_bandwidth_multiplier, int endpoint_bandwidth,
57 ClockedObject *em);
58 Throttle(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
59 int endpoint_bandwidth, ClockedObject *em);
60 ~Throttle() {}
61
62 std::string name()
63 { return csprintf("Throttle-%i", m_sID); }
64
65 void addLinks(const std::vector<MessageBuffer*>& in_vec,
66 const std::vector<MessageBuffer*>& out_vec, ClockedObject *em);
67 void wakeup();
68
69 void printStats(std::ostream& out) const;
70 void clearStats();
71 // The average utilization (a percent) since last clearStats()
72 double getUtilization() const;
73 int getLinkBandwidth() const
74 { return m_endpoint_bandwidth * m_link_bandwidth_multiplier; }
75
76 Cycles getLatency() const { return m_link_latency; }
77 const std::vector<std::vector<int> >&
78 getCounters() const
79 {
80 return m_message_counters;
81 }
82
83 void clear();
84
85 void print(std::ostream& out) const;
86
87 private:
88 void init(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
89 int endpoint_bandwidth);
90 void addVirtualNetwork(MessageBuffer* in_ptr, MessageBuffer* out_ptr,
91 ClockedObject *em);
92 void linkUtilized(double ratio) { m_links_utilized += ratio; }
93
94 // Private copy constructor and assignment operator
95 Throttle(const Throttle& obj);
96 Throttle& operator=(const Throttle& obj);
97
98 std::vector<MessageBuffer*> m_in;
99 std::vector<MessageBuffer*> m_out;
100 std::vector<std::vector<int> > m_message_counters;
101 int m_vnets;
102 std::vector<int> m_units_remaining;
103 int m_sID;
104 NodeID m_node;
105 int m_link_bandwidth_multiplier;
106 Cycles m_link_latency;
107 int m_wakeups_wo_switch;
108 int m_endpoint_bandwidth;
109
110 // For tracking utilization
111 Time m_ruby_start;
112 double m_links_utilized;
113};
114
115inline std::ostream&
116operator<<(std::ostream& out, const Throttle& obj)
117{
118 obj.print(out);
119 out << std::flush;
120 return out;
121}
122
123#endif // __MEM_RUBY_NETWORK_SIMPLE_THROTTLE_HH__