AbstractController.hh revision 9819 
1/*
2 * Copyright (c) 2009 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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef __MEM_RUBY_SLICC_INTERFACE_ABSTRACTCONTROLLER_HH__
30#define __MEM_RUBY_SLICC_INTERFACE_ABSTRACTCONTROLLER_HH__
31
32#include <iostream>
33#include <string>
34
35#include "base/callback.hh"
36#include "mem/protocol/AccessPermission.hh"
37#include "mem/ruby/buffers/MessageBuffer.hh"
38#include "mem/ruby/common/Address.hh"
39#include "mem/ruby/common/Consumer.hh"
40#include "mem/ruby/common/DataBlock.hh"
41#include "mem/ruby/common/Histogram.hh"
42#include "mem/ruby/network/Network.hh"
43#include "mem/ruby/recorder/CacheRecorder.hh"
44#include "mem/ruby/system/MachineID.hh"
45#include "mem/packet.hh"
46#include "params/RubyController.hh"
47#include "sim/clocked_object.hh"
48
49class Network;
50
51class AbstractController : public ClockedObject, public Consumer
52{
53  public:
54    typedef RubyControllerParams Params;
55    AbstractController(const Params *p);
56    void init();
57    const Params *params() const { return (const Params *)_params; }
58
59    const int & getVersion() const { return m_version; }
60    void initNetworkPtr(Network* net_ptr) { m_net_ptr = net_ptr; }
61
62    // return instance name
63    const std::string getName() const { return m_name; }
64    void blockOnQueue(Address, MessageBuffer*);
65    void unblock(Address);
66
67    virtual MessageBuffer* getMandatoryQueue() const = 0;
68    virtual const std::string toString() const = 0;  // returns text version of
69                                                     // controller type
70    virtual AccessPermission getAccessPermission(const Address& addr) = 0;
71    virtual DataBlock& getDataBlock(const Address& addr) = 0;
72
73    virtual void print(std::ostream & out) const = 0;
74    virtual void printStats(std::ostream & out) const = 0;
75    virtual void wakeup() = 0;
76    virtual void clearStats() = 0;
77    virtual void regStats() = 0;
78
79    virtual void recordCacheTrace(int cntrl, CacheRecorder* tr) = 0;
80    virtual Sequencer* getSequencer() const = 0;
81
82    //! These functions are used by ruby system to read/write the message
83    //! queues that exist with in the controller.
84    //! The boolean return value indicates if the read was performed
85    //! successfully.
86    virtual bool functionalReadBuffers(PacketPtr&) = 0;
87    //! The return value indicates the number of messages written with the
88    //! data from the packet.
89    virtual uint32_t functionalWriteBuffers(PacketPtr&) = 0;
90
91    //! Function for enqueuing a prefetch request
92    virtual void enqueuePrefetch(const Address&, const RubyRequestType&)
93    { fatal("Prefetches not implemented!");}
94
95    //! Function for collating statistics from all the controllers of this
96    //! particular type. This function should only be called from the
97    //! version 0 of this controller type.
98    virtual void collateStats()
99    {fatal("collateStats() should be overridden!");}
100
101  public:
102    MachineID getMachineID() const { return m_machineID; }
103    uint64_t getFullyBusyCycles() const { return m_fully_busy_cycles; }
104    uint64_t getRequestCount() const { return m_request_count; }
105    const std::map<std::string, uint64_t>& getRequestProfileMap() const
106    { return m_requestProfileMap; }
107
108    Histogram& getDelayHist() { return m_delayHistogram; }
109    Histogram& getDelayVCHist(uint32_t index)
110    { return m_delayVCHistogram[index]; }
111
112    MessageBuffer *getPeerQueue(uint32_t pid)
113    {
114        std::map<uint32_t, MessageBuffer *>::iterator it =
115                                        peerQueueMap.find(pid);
116        assert(it != peerQueueMap.end());
117        return (*it).second;
118    }
119
120  protected:
121    //! Profiles original cache requests including PUTs
122    void profileRequest(const std::string &request);
123    //! Profiles the delay associated with messages.
124    void profileMsgDelay(uint32_t virtualNetwork, Cycles delay);
125
126    //! Function for connecting peer controllers
127    void connectWithPeer(AbstractController *);
128    virtual void getQueuesFromPeer(AbstractController *)
129    { fatal("getQueuesFromPeer() should be called only if implemented!"); }
130
131    void stallBuffer(MessageBuffer* buf, Address addr);
132    void wakeUpBuffers(Address addr);
133    void wakeUpAllBuffers(Address addr);
134    void wakeUpAllBuffers();
135
136  protected:
137    int m_transitions_per_cycle;
138    int m_buffer_size;
139    Cycles m_recycle_latency;
140    std::string m_name;
141    NodeID m_version;
142    Network* m_net_ptr;
143    MachineID m_machineID;
144    bool m_is_blocking;
145    std::map<Address, MessageBuffer*> m_block_map;
146    typedef std::vector<MessageBuffer*> MsgVecType;
147    typedef std::map< Address, MsgVecType* > WaitingBufType;
148    WaitingBufType m_waiting_buffers;
149    int m_max_in_port_rank;
150    int m_cur_in_port_rank;
151    int m_number_of_TBEs;
152
153    //! Map from physical network number to the Message Buffer.
154    std::map<uint32_t, MessageBuffer*> peerQueueMap;
155
156    //! Counter for the number of cycles when the transitions carried out
157    //! were equal to the maximum allowed
158    uint64_t m_fully_busy_cycles;
159
160    //! Map for couting requests of different types. The controller should
161    //! call requisite function for updating the count.
162    std::map<std::string, uint64_t> m_requestProfileMap;
163    uint64_t m_request_count;
164
165    //! Histogram for profiling delay for the messages this controller
166    //! cares for
167    Histogram m_delayHistogram;
168    std::vector<Histogram> m_delayVCHistogram;
169
170    //! Callback class used for collating statistics from all the
171    //! controller of this type.
172    class StatsCallback : public Callback
173    {
174      private:
175        AbstractController *ctr;
176
177      public:
178        virtual ~StatsCallback() {}
179
180        StatsCallback(AbstractController *_ctr)
181            : ctr(_ctr)
182        {
183        }
184
185        void process() {ctr->collateStats();}
186    };
187};
188
189#endif // __MEM_RUBY_SLICC_INTERFACE_ABSTRACTCONTROLLER_HH__
190