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, int link_latency,
56 int link_bandwidth_multiplier, int endpoint_bandwidth,
57 ClockedObject *em);
58 Throttle(NodeID node, int 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
74 getLinkBandwidth() const
75 {
76 return m_endpoint_bandwidth * m_link_bandwidth_multiplier;
77 }
78 int getLatency() const { return m_link_latency; }
79
80 const std::vector<std::vector<int> >&
81 getCounters() const
82 {
83 return m_message_counters;
84 }
85
86 void clear();
87
88 void print(std::ostream& out) const;
89
90 private:
91 void init(NodeID node, int link_latency, int link_bandwidth_multiplier,
92 int endpoint_bandwidth);
93 void addVirtualNetwork(MessageBuffer* in_ptr, MessageBuffer* out_ptr,
94 ClockedObject *em);
95 void linkUtilized(double ratio) { m_links_utilized += ratio; }
96
97 // Private copy constructor and assignment operator
98 Throttle(const Throttle& obj);
99 Throttle& operator=(const Throttle& obj);
100
101 std::vector<MessageBuffer*> m_in;
102 std::vector<MessageBuffer*> m_out;
103 std::vector<std::vector<int> > m_message_counters;
104 int m_vnets;
105 std::vector<int> m_units_remaining;
106 int m_sID;
107 NodeID m_node;
108 int m_link_bandwidth_multiplier;
109 int m_link_latency;
110 int m_wakeups_wo_switch;
111 int m_endpoint_bandwidth;
112
113 // For tracking utilization
114 Time m_ruby_start;
115 double m_links_utilized;
116};
117
118inline std::ostream&
119operator<<(std::ostream& out, const Throttle& obj)
120{
121 obj.print(out);
122 out << std::flush;
123 return out;
124}
125
126#endif // __MEM_RUBY_NETWORK_SIMPLE_THROTTLE_HH__