diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/testers/traffic_gen/traffic_gen.cc | 73 | ||||
| -rw-r--r-- | src/cpu/testers/traffic_gen/traffic_gen.hh | 180 |
2 files changed, 94 insertions, 159 deletions
diff --git a/src/cpu/testers/traffic_gen/traffic_gen.cc b/src/cpu/testers/traffic_gen/traffic_gen.cc index 0aef7e061..3e2dc6eb2 100644 --- a/src/cpu/testers/traffic_gen/traffic_gen.cc +++ b/src/cpu/testers/traffic_gen/traffic_gen.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012 ARM Limited + * Copyright (c) 2012-2013 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -54,10 +54,11 @@ TrafficGen::TrafficGen(const TrafficGenParams* p) : MemObject(p), system(p->system), masterID(system->getMasterId(name())), + nextTransitionTick(0), port(name() + ".port", *this), - stateGraph(*this, port, p->config_file, masterID), - updateStateGraphEvent(this) + updateEvent(this) { + parseConfig(p->config_file, masterID); } TrafficGen* @@ -87,7 +88,7 @@ TrafficGen::init() DPRINTF(TrafficGen, "Timing mode, activating request generator\n"); // enter initial state - stateGraph.enterState(stateGraph.currState); + enterState(currState); } else { DPRINTF(TrafficGen, "Traffic generator is only active in timing mode\n"); @@ -99,8 +100,7 @@ TrafficGen::initState() { // when not restoring from a checkpoint, make sure we kick things off if (system->isTimingMode()) { - Tick nextStateGraphEvent = stateGraph.nextEventTick(); - schedule(updateStateGraphEvent, nextStateGraphEvent); + schedule(updateEvent, nextEventTick()); } else { DPRINTF(TrafficGen, "Traffic generator is only active in timing mode\n"); @@ -121,15 +121,14 @@ TrafficGen::serialize(ostream &os) DPRINTF(Checkpoint, "Serializing TrafficGen\n"); // save ticks of the graph event if it is scheduled - Tick nextStateGraphEvent = updateStateGraphEvent.scheduled() ? - updateStateGraphEvent.when() : 0; + Tick nextEvent = updateEvent.scheduled() ? + updateEvent.when() : 0; - DPRINTF(TrafficGen, "Saving nextStateGraphEvent=%llu\n", - nextStateGraphEvent); + DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", + nextEvent); - SERIALIZE_SCALAR(nextStateGraphEvent); + SERIALIZE_SCALAR(nextEvent); - Tick nextTransitionTick = stateGraph.nextTransitionTick; SERIALIZE_SCALAR(nextTransitionTick); // @todo: also serialise the current state, figure out the best @@ -140,34 +139,39 @@ void TrafficGen::unserialize(Checkpoint* cp, const string& section) { // restore scheduled events - Tick nextStateGraphEvent; - UNSERIALIZE_SCALAR(nextStateGraphEvent); - if (nextStateGraphEvent != 0) { - schedule(updateStateGraphEvent, nextStateGraphEvent); + Tick nextEvent; + UNSERIALIZE_SCALAR(nextEvent); + if (nextEvent != 0) { + schedule(updateEvent, nextEvent); } - Tick nextTransitionTick; UNSERIALIZE_SCALAR(nextTransitionTick); - stateGraph.nextTransitionTick = nextTransitionTick; } void -TrafficGen::updateStateGraph() +TrafficGen::update() { // schedule next update event based on either the next execute // tick or the next transition, which ever comes first - Tick nextStateGraphEvent = stateGraph.nextEventTick(); + Tick nextEvent = nextEventTick(); DPRINTF(TrafficGen, "Updating state graph, next event at %lld\n", - nextStateGraphEvent); - schedule(updateStateGraphEvent, nextStateGraphEvent); + nextEvent); + schedule(updateEvent, nextEvent); // perform the update associated with the current update event - stateGraph.update(); + + // if we have reached the time for the next state transition, then + // perform the transition + if (curTick() >= nextTransitionTick) { + transition(); + } else { + // we are still in the current state and should execute it + states[currState]->execute(); + } } void -TrafficGen::StateGraph::parseConfig(const string& file_name, - MasterID master_id) +TrafficGen::parseConfig(const string& file_name, MasterID master_id) { // keep track of the transitions parsed to create the matrix when // done @@ -178,7 +182,7 @@ TrafficGen::StateGraph::parseConfig(const string& file_name, infile.open(file_name.c_str(), ifstream::in); if (!infile.is_open()) { fatal("Traffic generator %s config file not found at %s\n", - owner.name(), file_name); + name(), file_name); } // read line by line and determine the action based on the first @@ -302,20 +306,7 @@ TrafficGen::StateGraph::parseConfig(const string& file_name, } void -TrafficGen::StateGraph::update() -{ - // if we have reached the time for the next state transition, then - // perform the transition - if (curTick() >= nextTransitionTick) { - transition(); - } else { - // we are still in the current state and should execute it - states[currState]->execute(); - } -} - -void -TrafficGen::StateGraph::transition() +TrafficGen::transition() { // exit the current state states[currState]->exit(); @@ -334,7 +325,7 @@ TrafficGen::StateGraph::transition() } void -TrafficGen::StateGraph::enterState(uint32_t newState) +TrafficGen::enterState(uint32_t newState) { DPRINTF(TrafficGen, "Transition to state %d\n", newState); diff --git a/src/cpu/testers/traffic_gen/traffic_gen.hh b/src/cpu/testers/traffic_gen/traffic_gen.hh index 6793e24b6..a2fcd3bc0 100644 --- a/src/cpu/testers/traffic_gen/traffic_gen.hh +++ b/src/cpu/testers/traffic_gen/traffic_gen.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012 ARM Limited + * Copyright (c) 2012-2013 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -49,12 +49,12 @@ /** * The traffic generator is a master module that generates stimuli for - * the memory system, based on a collection of simple behaviours that - * are either probabilistic or based on traces. It can be used stand - * alone for creating test cases for interconnect and memory - * controllers, or function as a black box replacement for system - * components that are not yet modelled in detail, e.g. a video engine - * or baseband subsystem. + * the memory system, based on a collection of simple generator + * behaviours that are either probabilistic or based on traces. It can + * be used stand alone for creating test cases for interconnect and + * memory controllers, or function as a black box replacement for + * system components that are not yet modelled in detail, e.g. a video + * engine or baseband subsystem. */ class TrafficGen : public MemObject { @@ -62,123 +62,76 @@ class TrafficGen : public MemObject private: /** - * The system used to determine which mode we are currently operating - * in. + * Determine next state and perform the transition. */ - System* system; + void transition(); /** - * MasterID used in generated requests. + * Enter a new state. + * + * @param newState identifier of state to enter */ - MasterID masterID; - - protected: + void enterState(uint32_t newState); /** - * The state graph is responsible for instantiating and keeping - * track of the various generator states and also perform the - * transitions and call the appropriate functions when entering, - * executing and exiting a state. + * Get the tick of the next event, either an execution or a + * transition. + * + * @return tick of the next update event */ - class StateGraph + Tick nextEventTick() { + return std::min(states[currState]->nextExecuteTick(), + nextTransitionTick); + } - public: - - /** - * Create a state graph from an input file. - * - * @param _owner used solely for the name - * @param _port port used to send requests - * @param file_name configuration description to read in - * @param master_id the unique id used for all requests - */ - StateGraph(TrafficGen& _owner, QueuedMasterPort& _port, - const std::string& file_name, MasterID master_id) - : nextTransitionTick(0), owner(_owner), port(_port) - { - parseConfig(file_name, master_id); - } - - /** - * Get the name, used for DPRINTFs. - * - * @return the owner's name - */ - std::string name() const { return owner.name(); } - - /** - * Either perform a state transition or execute the current - * state, depending on the current time. - */ - void update(); - - /** - * Determine next state and perform the transition. - */ - void transition(); - - /** - * Enter a new state. - * - * @param newState identifier of state to enter - */ - void enterState(uint32_t newState); - - /** - * Get the tick of the next event, either an execution or a - * transition. - * - * @return tick of the next state graph event - */ - Tick nextEventTick() - { - return std::min(states[currState]->nextExecuteTick(), - nextTransitionTick); - - } - - /** Time of next transition */ - Tick nextTransitionTick; - - private: - - /** - * Parse the config file and build the state map and - * transition matrix. - * - * @param file_name Config file name to parse - * @param master_id MasterID to use for generated requests - */ - void parseConfig(const std::string& file_name, MasterID master_id); + /** + * Parse the config file and build the state map and + * transition matrix. + * + * @param file_name Config file name to parse + * @param master_id MasterID to use for generated requests + */ + void parseConfig(const std::string& file_name, MasterID master_id); - /** Struct to represent a probabilistic transition during parsing. */ - struct Transition { - uint32_t from; - uint32_t to; - double p; - }; + /** + * Schedules event for next update and executes an update on the + * state graph, either performing a state transition or executing + * the current state, depending on the current time. + */ + void update(); - /** Pointer to owner of request handler */ - TrafficGen& owner; + /** Struct to represent a probabilistic transition during parsing. */ + struct Transition { + uint32_t from; + uint32_t to; + double p; + }; - /** Pointer to request handler */ - QueuedMasterPort& port; + /** + * The system used to determine which mode we are currently operating + * in. + */ + System* system; - /** State transition matrix */ - std::vector<std::vector<double> > transitionMatrix; + /** + * MasterID used in generated requests. + */ + MasterID masterID; - public: + /** Time of next transition */ + Tick nextTransitionTick; - /** Index of the current state */ - uint32_t currState; + /** State transition matrix */ + std::vector<std::vector<double> > transitionMatrix; - /** Map of states */ - m5::hash_map<uint32_t, BaseGen*> states; - }; + /** Index of the current state */ + uint32_t currState; + /** Map of generator states */ + m5::hash_map<uint32_t, BaseGen*> states; - /** Queued handler */ + /** Queued master port */ class TrafficGenPort : public QueuedMasterPort { public: @@ -197,20 +150,11 @@ class TrafficGen : public MemObject }; + /** The instance of master port used by the traffic generator. */ TrafficGenPort port; - /** Request generator state graph */ - StateGraph stateGraph; - - /** - * Schedules event for next update and executes an update on the - * state graph. - */ - void updateStateGraph(); - - /** Event for updating the state graph */ - EventWrapper<TrafficGen, - &TrafficGen::updateStateGraph> updateStateGraphEvent; + /** Event for scheduling updates */ + EventWrapper<TrafficGen, &TrafficGen::update> updateEvent; public: |