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authorKorey Sewell <ksewell@umich.edu>2010-01-31 18:30:24 -0500
committerKorey Sewell <ksewell@umich.edu>2010-01-31 18:30:24 -0500
commitea8909925fd0e7a33feabc9e17f83b85cd7c6039 (patch)
tree8e73a1913dffbafc48831781e075fb573c1adbbb /src/cpu
parentf3bc2df663cccd7db7a4ba87acfc2d0137a5ca02 (diff)
downloadgem5-ea8909925fd0e7a33feabc9e17f83b85cd7c6039.tar.xz
inorder: add activity stats
Diffstat (limited to 'src/cpu')
-rw-r--r--src/cpu/inorder/cpu.cc25
-rw-r--r--src/cpu/inorder/cpu.hh8
-rw-r--r--src/cpu/inorder/first_stage.cc4
-rw-r--r--src/cpu/inorder/pipeline_stage.cc6
-rw-r--r--src/cpu/inorder/pipeline_stage.hh2
-rw-r--r--src/cpu/inorder/resources/cache_unit.cc16
6 files changed, 49 insertions, 12 deletions
diff --git a/src/cpu/inorder/cpu.cc b/src/cpu/inorder/cpu.cc
index a3b203559..e864c8c86 100644
--- a/src/cpu/inorder/cpu.cc
+++ b/src/cpu/inorder/cpu.cc
@@ -389,9 +389,17 @@ InOrderCPU::regStats()
idleCycles
.name(name() + ".idleCycles")
- .desc("Total number of cycles that the CPU has spent unscheduled due "
- "to idling")
- .prereq(idleCycles);
+ .desc("Number of cycles cpu's stages were not processed");
+
+ runCycles
+ .name(name() + ".runCycles")
+ .desc("Number of cycles cpu stages are processed.");
+
+ activity
+ .name(name() + ".activity")
+ .desc("Percentage of cycles cpu is active")
+ .precision(6);
+ activity = (runCycles / numCycles) * 100;
threadCycles
.init(numThreads)
@@ -463,18 +471,27 @@ InOrderCPU::tick()
++numCycles;
+ bool pipes_idle = true;
+
//Tick each of the stages
for (int stNum=NumStages - 1; stNum >= 0 ; stNum--) {
pipelineStage[stNum]->tick();
+
+ pipes_idle = pipes_idle && pipelineStage[stNum]->idle;
}
+ if (pipes_idle)
+ idleCycles++;
+ else
+ runCycles++;
+
// Now advance the time buffers one tick
timeBuffer.advance();
for (int sqNum=0; sqNum < NumStages - 1; sqNum++) {
stageQueue[sqNum]->advance();
}
activityRec.advance();
-
+
// Any squashed requests, events, or insts then remove them now
cleanUpRemovedReqs();
cleanUpRemovedEvents();
diff --git a/src/cpu/inorder/cpu.hh b/src/cpu/inorder/cpu.hh
index d8424397b..253b5b18f 100644
--- a/src/cpu/inorder/cpu.hh
+++ b/src/cpu/inorder/cpu.hh
@@ -729,9 +729,15 @@ class InOrderCPU : public BaseCPU
/** Stat for total number of times the CPU is descheduled. */
Stats::Scalar timesIdled;
- /** Stat for total number of cycles the CPU spends descheduled. */
+ /** Stat for total number of cycles the CPU spends descheduled or no stages active. */
Stats::Scalar idleCycles;
+ /** Stat for total number of cycles the CPU is active. */
+ Stats::Scalar runCycles;
+
+ /** Percentage of cycles a stage was active */
+ Stats::Formula activity;
+
/** Stat for the number of committed instructions per thread. */
Stats::Vector committedInsts;
diff --git a/src/cpu/inorder/first_stage.cc b/src/cpu/inorder/first_stage.cc
index c653d152b..658ce37d3 100644
--- a/src/cpu/inorder/first_stage.cc
+++ b/src/cpu/inorder/first_stage.cc
@@ -133,8 +133,10 @@ FirstStage::processStage(bool &status_change)
if (instsProcessed > 0) {
++runCycles;
+ idle = false;
} else {
- ++idleCycles;
+ ++idleCycles;
+ idle = true;
}
}
diff --git a/src/cpu/inorder/pipeline_stage.cc b/src/cpu/inorder/pipeline_stage.cc
index 550952947..c991fe1bd 100644
--- a/src/cpu/inorder/pipeline_stage.cc
+++ b/src/cpu/inorder/pipeline_stage.cc
@@ -42,7 +42,7 @@ PipelineStage::PipelineStage(Params *params, unsigned stage_num)
: stageNum(stage_num), stageWidth(ThePipeline::StageWidth),
numThreads(ThePipeline::MaxThreads), _status(Inactive),
stageBufferMax(ThePipeline::interStageBuffSize[stage_num]),
- prevStageValid(false), nextStageValid(false)
+ prevStageValid(false), nextStageValid(false), idle(false)
{
switchedOutBuffer.resize(ThePipeline::MaxThreads);
switchedOutValid.resize(ThePipeline::MaxThreads);
@@ -707,6 +707,8 @@ PipelineStage::checkSignalsAndUpdate(ThreadID tid)
void
PipelineStage::tick()
{
+ idle = false;
+
wroteToTimeBuffer = false;
bool status_change = false;
@@ -794,8 +796,10 @@ PipelineStage::processStage(bool &status_change)
if (instsProcessed > 0) {
++runCycles;
+ idle = false;
} else {
++idleCycles;
+ idle = true;
}
DPRINTF(InOrderStage, "%i left in stage %i incoming buffer.\n", skidSize(),
diff --git a/src/cpu/inorder/pipeline_stage.hh b/src/cpu/inorder/pipeline_stage.hh
index be3a1093c..6c9cf0d99 100644
--- a/src/cpu/inorder/pipeline_stage.hh
+++ b/src/cpu/inorder/pipeline_stage.hh
@@ -347,6 +347,8 @@ class PipelineStage
/** Is Next Stage Valid? */
bool nextStageValid;
+ bool idle;
+
/** Source of possible stalls. */
struct Stalls {
bool stage[ThePipeline::NumStages];
diff --git a/src/cpu/inorder/resources/cache_unit.cc b/src/cpu/inorder/resources/cache_unit.cc
index 65782cb73..275d9a7e8 100644
--- a/src/cpu/inorder/resources/cache_unit.cc
+++ b/src/cpu/inorder/resources/cache_unit.cc
@@ -143,7 +143,8 @@ CacheUnit::getSlot(DynInstPtr inst)
Addr req_addr = inst->getMemAddr();
if (resName == "icache_port" ||
- find(addrList[tid].begin(), addrList[tid].end(), req_addr) == addrList[tid].end()) {
+ find(addrList[tid].begin(), addrList[tid].end(), req_addr) ==
+ addrList[tid].end()) {
int new_slot = Resource::getSlot(inst);
@@ -171,8 +172,9 @@ CacheUnit::freeSlot(int slot_num)
{
ThreadID tid = reqMap[slot_num]->inst->readTid();
- vector<Addr>::iterator vect_it = find(addrList[tid].begin(), addrList[tid].end(),
- reqMap[slot_num]->inst->getMemAddr());
+ vector<Addr>::iterator vect_it =
+ find(addrList[tid].begin(), addrList[tid].end(),
+ reqMap[slot_num]->inst->getMemAddr());
assert(vect_it != addrList[tid].end());
DPRINTF(InOrderCachePort,
@@ -533,8 +535,6 @@ CacheUnit::doCacheAccess(DynInstPtr inst, uint64_t *write_res)
}
}
- cache_req->dataPkt->time = curTick;
-
bool do_access = true; // flag to suppress cache access
Request *memReq = cache_req->dataPkt->req;
@@ -590,6 +590,7 @@ CacheUnit::processCacheCompletion(PacketPtr pkt)
{
// Cast to correct packet type
CacheReqPacket* cache_pkt = dynamic_cast<CacheReqPacket*>(pkt);
+
assert(cache_pkt);
if (cache_pkt->cacheReq->isSquashed()) {
@@ -600,6 +601,9 @@ CacheUnit::processCacheCompletion(PacketPtr pkt)
cache_pkt->cacheReq->done();
delete cache_pkt;
+
+ cpu->wakeCPU();
+
return;
}
@@ -730,6 +734,8 @@ CacheUnit::recvRetry()
// Clear the cache port for use again
cachePortBlocked = false;
+
+ cpu->wakeCPU();
}
CacheUnitEvent::CacheUnitEvent()