2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * Copyright (c) 2011 Regents of the University of California
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * Authors: Steve Reinhardt
38 #include "arch/tlb.hh"
39 #include "base/loader/symtab.hh"
40 #include "base/cprintf.hh"
41 #include "base/misc.hh"
42 #include "base/output.hh"
43 #include "base/trace.hh"
44 #include "cpu/base.hh"
45 #include "cpu/cpuevent.hh"
46 #include "cpu/profile.hh"
47 #include "cpu/thread_context.hh"
48 #include "debug/SyscallVerbose.hh"
49 #include "params/BaseCPU.hh"
50 #include "sim/process.hh"
51 #include "sim/sim_events.hh"
52 #include "sim/sim_exit.hh"
53 #include "sim/system.hh"
56 #include "sim/stat_control.hh"
60 vector
<BaseCPU
*> BaseCPU::cpuList
;
62 // This variable reflects the max number of threads in any CPU. Be
63 // careful to only use it once all the CPUs that you care about have
65 int maxThreadsPerCPU
= 1;
67 CPUProgressEvent::CPUProgressEvent(BaseCPU
*_cpu
, Tick ival
)
68 : Event(Event::Progress_Event_Pri
), _interval(ival
), lastNumInst(0),
69 cpu(_cpu
), _repeatEvent(true)
72 cpu
->schedule(this, curTick() + _interval
);
76 CPUProgressEvent::process()
78 Counter temp
= cpu
->totalInstructions();
80 double ipc
= double(temp
- lastNumInst
) / (_interval
/ cpu
->ticks(1));
82 DPRINTFN("%s progress event, total committed:%i, progress insts committed: "
83 "%lli, IPC: %0.8d\n", cpu
->name(), temp
, temp
- lastNumInst
,
87 cprintf("%lli: %s progress event, total committed:%i, progress insts "
88 "committed: %lli\n", curTick(), cpu
->name(), temp
,
94 cpu
->schedule(this, curTick() + _interval
);
98 CPUProgressEvent::description() const
100 return "CPU Progress";
104 BaseCPU::BaseCPU(Params
*p
)
105 : MemObject(p
), clock(p
->clock
), instCnt(0), _cpuId(p
->cpu_id
),
106 interrupts(p
->interrupts
),
107 numThreads(p
->numThreads
), system(p
->system
),
110 BaseCPU::BaseCPU(Params
*p
)
111 : MemObject(p
), clock(p
->clock
), _cpuId(p
->cpu_id
),
112 numThreads(p
->numThreads
), system(p
->system
),
116 // currentTick = curTick();
118 // if Python did not provide a valid ID, do it here
120 _cpuId
= cpuList
.size();
123 // add self to global list of CPUs
124 cpuList
.push_back(this);
126 DPRINTF(SyscallVerbose
, "Constructing CPU with id %d\n", _cpuId
);
128 if (numThreads
> maxThreadsPerCPU
)
129 maxThreadsPerCPU
= numThreads
;
131 // allocate per-thread instruction-based event queues
132 comInstEventQueue
= new EventQueue
*[numThreads
];
133 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
)
134 comInstEventQueue
[tid
] =
135 new EventQueue("instruction-based event queue");
138 // set up instruction-count-based termination events, if any
140 if (p
->max_insts_any_thread
!= 0) {
141 const char *cause
= "a thread reached the max instruction count";
142 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
) {
143 Event
*event
= new SimLoopExitEvent(cause
, 0);
144 comInstEventQueue
[tid
]->schedule(event
, p
->max_insts_any_thread
);
148 if (p
->max_insts_all_threads
!= 0) {
149 const char *cause
= "all threads reached the max instruction count";
151 // allocate & initialize shared downcounter: each event will
152 // decrement this when triggered; simulation will terminate
153 // when counter reaches 0
154 int *counter
= new int;
155 *counter
= numThreads
;
156 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
) {
157 Event
*event
= new CountedExitEvent(cause
, *counter
);
158 comInstEventQueue
[tid
]->schedule(event
, p
->max_insts_all_threads
);
162 // allocate per-thread load-based event queues
163 comLoadEventQueue
= new EventQueue
*[numThreads
];
164 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
)
165 comLoadEventQueue
[tid
] = new EventQueue("load-based event queue");
168 // set up instruction-count-based termination events, if any
170 if (p
->max_loads_any_thread
!= 0) {
171 const char *cause
= "a thread reached the max load count";
172 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
) {
173 Event
*event
= new SimLoopExitEvent(cause
, 0);
174 comLoadEventQueue
[tid
]->schedule(event
, p
->max_loads_any_thread
);
178 if (p
->max_loads_all_threads
!= 0) {
179 const char *cause
= "all threads reached the max load count";
180 // allocate & initialize shared downcounter: each event will
181 // decrement this when triggered; simulation will terminate
182 // when counter reaches 0
183 int *counter
= new int;
184 *counter
= numThreads
;
185 for (ThreadID tid
= 0; tid
< numThreads
; ++tid
) {
186 Event
*event
= new CountedExitEvent(cause
, *counter
);
187 comLoadEventQueue
[tid
]->schedule(event
, p
->max_loads_all_threads
);
191 functionTracingEnabled
= false;
192 if (p
->function_trace
) {
193 functionTraceStream
= simout
.find(csprintf("ftrace.%s", name()));
194 currentFunctionStart
= currentFunctionEnd
= 0;
195 functionEntryTick
= p
->function_trace_start
;
197 if (p
->function_trace_start
== 0) {
198 functionTracingEnabled
= true;
200 typedef EventWrapper
<BaseCPU
, &BaseCPU::enableFunctionTrace
> wrap
;
201 Event
*event
= new wrap(this, true);
202 schedule(event
, p
->function_trace_start
);
206 interrupts
->setCPU(this);
209 if (params()->profile
)
210 profileEvent
= new ProfileEvent(this, params()->profile
);
212 tracer
= params()->tracer
;
216 BaseCPU::enableFunctionTrace()
218 functionTracingEnabled
= true;
228 if (!params()->defer_registration
)
229 registerThreadContexts();
236 if (!params()->defer_registration
&& profileEvent
)
237 schedule(profileEvent
, curTick());
240 if (params()->progress_interval
) {
241 Tick num_ticks
= ticks(params()->progress_interval
);
244 event
= new CPUProgressEvent(this, num_ticks
);
252 using namespace Stats
;
255 .name(name() + ".numCycles")
256 .desc("number of cpu cycles simulated")
260 .name(name() + ".numWorkItemsStarted")
261 .desc("number of work items this cpu started")
264 numWorkItemsCompleted
265 .name(name() + ".numWorkItemsCompleted")
266 .desc("number of work items this cpu completed")
269 int size
= threadContexts
.size();
271 for (int i
= 0; i
< size
; ++i
) {
272 stringstream namestr
;
273 ccprintf(namestr
, "%s.ctx%d", name(), i
);
274 threadContexts
[i
]->regStats(namestr
.str());
276 } else if (size
== 1)
277 threadContexts
[0]->regStats(name());
286 Tick next_tick
= curTick() - phase
+ clock
- 1;
287 next_tick
-= (next_tick
% clock
);
293 BaseCPU::nextCycle(Tick begin_tick
)
295 Tick next_tick
= begin_tick
;
296 if (next_tick
% clock
!= 0)
297 next_tick
= next_tick
- (next_tick
% clock
) + clock
;
300 assert(next_tick
>= curTick());
305 BaseCPU::registerThreadContexts()
307 ThreadID size
= threadContexts
.size();
308 for (ThreadID tid
= 0; tid
< size
; ++tid
) {
309 ThreadContext
*tc
= threadContexts
[tid
];
311 /** This is so that contextId and cpuId match where there is a
312 * 1cpu:1context relationship. Otherwise, the order of registration
313 * could affect the assignment and cpu 1 could have context id 3, for
314 * example. We may even want to do something like this for SMT so that
315 * cpu 0 has the lowest thread contexts and cpu N has the highest, but
316 * I'll just do this for now
319 tc
->setContextId(system
->registerThreadContext(tc
, _cpuId
));
321 tc
->setContextId(system
->registerThreadContext(tc
));
323 tc
->getProcessPtr()->assignThreadContext(tc
->contextId());
330 BaseCPU::findContext(ThreadContext
*tc
)
332 ThreadID size
= threadContexts
.size();
333 for (ThreadID tid
= 0; tid
< size
; ++tid
) {
334 if (tc
== threadContexts
[tid
])
343 // panic("This CPU doesn't support sampling!");
345 if (profileEvent
&& profileEvent
->scheduled())
346 deschedule(profileEvent
);
351 BaseCPU::takeOverFrom(BaseCPU
*oldCPU
, Port
*ic
, Port
*dc
)
353 assert(threadContexts
.size() == oldCPU
->threadContexts
.size());
355 _cpuId
= oldCPU
->cpuId();
357 ThreadID size
= threadContexts
.size();
358 for (ThreadID i
= 0; i
< size
; ++i
) {
359 ThreadContext
*newTC
= threadContexts
[i
];
360 ThreadContext
*oldTC
= oldCPU
->threadContexts
[i
];
362 newTC
->takeOverFrom(oldTC
);
364 CpuEvent::replaceThreadContext(oldTC
, newTC
);
366 assert(newTC
->contextId() == oldTC
->contextId());
367 assert(newTC
->threadId() == oldTC
->threadId());
368 system
->replaceThreadContext(newTC
, newTC
->contextId());
370 /* This code no longer works since the zero register (e.g.,
371 * r31 on Alpha) doesn't necessarily contain zero at this
374 ThreadContext::compare(oldTC, newTC);
377 Port
*old_itb_port
, *old_dtb_port
, *new_itb_port
, *new_dtb_port
;
378 old_itb_port
= oldTC
->getITBPtr()->getPort();
379 old_dtb_port
= oldTC
->getDTBPtr()->getPort();
380 new_itb_port
= newTC
->getITBPtr()->getPort();
381 new_dtb_port
= newTC
->getDTBPtr()->getPort();
383 // Move over any table walker ports if they exist
384 if (new_itb_port
&& !new_itb_port
->isConnected()) {
385 assert(old_itb_port
);
386 Port
*peer
= old_itb_port
->getPeer();;
387 new_itb_port
->setPeer(peer
);
388 peer
->setPeer(new_itb_port
);
390 if (new_dtb_port
&& !new_dtb_port
->isConnected()) {
391 assert(old_dtb_port
);
392 Port
*peer
= old_dtb_port
->getPeer();;
393 new_dtb_port
->setPeer(peer
);
394 peer
->setPeer(new_dtb_port
);
399 interrupts
= oldCPU
->interrupts
;
400 interrupts
->setCPU(this);
402 for (ThreadID i
= 0; i
< size
; ++i
)
403 threadContexts
[i
]->profileClear();
406 schedule(profileEvent
, curTick());
409 // Connect new CPU to old CPU's memory only if new CPU isn't
410 // connected to anything. Also connect old CPU's memory to new
412 if (!ic
->isConnected()) {
413 Port
*peer
= oldCPU
->getPort("icache_port")->getPeer();
418 if (!dc
->isConnected()) {
419 Port
*peer
= oldCPU
->getPort("dcache_port")->getPeer();
427 BaseCPU::ProfileEvent::ProfileEvent(BaseCPU
*_cpu
, Tick _interval
)
428 : cpu(_cpu
), interval(_interval
)
432 BaseCPU::ProfileEvent::process()
434 ThreadID size
= cpu
->threadContexts
.size();
435 for (ThreadID i
= 0; i
< size
; ++i
) {
436 ThreadContext
*tc
= cpu
->threadContexts
[i
];
440 cpu
->schedule(this, curTick() + interval
);
444 BaseCPU::serialize(std::ostream
&os
)
446 SERIALIZE_SCALAR(instCnt
);
447 interrupts
->serialize(os
);
451 BaseCPU::unserialize(Checkpoint
*cp
, const std::string
§ion
)
453 UNSERIALIZE_SCALAR(instCnt
);
454 interrupts
->unserialize(cp
, section
);
457 #endif // FULL_SYSTEM
460 BaseCPU::traceFunctionsInternal(Addr pc
)
462 if (!debugSymbolTable
)
465 // if pc enters different function, print new function symbol and
466 // update saved range. Otherwise do nothing.
467 if (pc
< currentFunctionStart
|| pc
>= currentFunctionEnd
) {
469 bool found
= debugSymbolTable
->findNearestSymbol(pc
, sym_str
,
470 currentFunctionStart
,
474 // no symbol found: use addr as label
475 sym_str
= csprintf("0x%x", pc
);
476 currentFunctionStart
= pc
;
477 currentFunctionEnd
= pc
+ 1;
480 ccprintf(*functionTraceStream
, " (%d)\n%d: %s",
481 curTick() - functionEntryTick
, curTick(), sym_str
);
482 functionEntryTick
= curTick();