gem5/cpu/activity.cc
Kevin Lim c4a87f874a Move activity tracking code into its own class. Now the CPU no longer has to keep track of the activity tracking internals; it just calls advance() on the class and uses it to tell if it should deschedule itself.
SConscript:
    Split off activity/idling code into its own class to do the processing separately.
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_params.hh:
    Activity stuff.  This is mostly for debugging and may be removed later on (or changed to enable/disable activity idling).
cpu/o3/cpu.cc:
    Move activity idling stuff mostly into its own class, so it no longer clutters this file.
cpu/o3/cpu.hh:
    Move activity idling stuff into its own class.
python/m5/objects/AlphaFullCPU.py:
    Add parameter for initial activity value.

--HG--
extra : convert_revision : f32f7cc03895dc07ab57ddba78c5402a1a8b0f1a
2006-05-19 15:37:52 -04:00

122 lines
2.4 KiB
C++

#include "base/timebuf.hh"
#include "cpu/activity.hh"
ActivityRecorder::ActivityRecorder(int num_stages, int longest_latency,
int activity)
: activityBuffer(longest_latency, 0), longestLatency(longest_latency),
activityCount(activity), numStages(num_stages)
{
stageActive = new bool[numStages];
memset(stageActive, 0, numStages);
}
void
ActivityRecorder::activity()
{
if (activityBuffer[0]) {
return;
}
activityBuffer[0] = true;
++activityCount;
DPRINTF(Activity, "Activity: %i\n", activityCount);
}
void
ActivityRecorder::advance()
{
if (activityBuffer[-longestLatency]) {
--activityCount;
assert(activityCount >= 0);
DPRINTF(Activity, "Activity: %i\n", activityCount);
if (activityCount == 0) {
DPRINTF(Activity, "No activity left!\n");
}
}
activityBuffer.advance();
}
void
ActivityRecorder::activateStage(const int idx)
{
if (!stageActive[idx]) {
++activityCount;
stageActive[idx] = true;
DPRINTF(Activity, "Activity: %i\n", activityCount);
} else {
DPRINTF(Activity, "Stage %i already active.\n", idx);
}
// assert(activityCount < longestLatency + numStages + 1);
}
void
ActivityRecorder::deactivateStage(const int idx)
{
if (stageActive[idx]) {
--activityCount;
stageActive[idx] = false;
DPRINTF(Activity, "Activity: %i\n", activityCount);
} else {
DPRINTF(Activity, "Stage %i already inactive.\n", idx);
}
assert(activityCount >= 0);
}
void
ActivityRecorder::reset()
{
activityCount = 0;
memset(stageActive, 0, numStages);
for (int i = 0; i < longestLatency + 1; ++i)
activityBuffer.advance();
}
void
ActivityRecorder::dump()
{
for (int i = 0; i <= longestLatency; ++i) {
cprintf("[Idx:%i %i] ", i, activityBuffer[-i]);
}
cprintf("\n");
for (int i = 0; i < numStages; ++i) {
cprintf("[Stage:%i %i]\n", i, stageActive[i]);
}
cprintf("\n");
cprintf("Activity count: %i\n", activityCount);
}
void
ActivityRecorder::validate()
{
int count = 0;
for (int i = 0; i <= longestLatency; ++i) {
if (activityBuffer[-i]) {
count++;
}
}
for (int i = 0; i < numStages; ++i) {
if (stageActive[i]) {
count++;
}
}
assert(count == activityCount);
}