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-rw-r--r--cpu/activity.cc122
1 files changed, 122 insertions, 0 deletions
diff --git a/cpu/activity.cc b/cpu/activity.cc
new file mode 100644
index 000000000..6dcb6e341
--- /dev/null
+++ b/cpu/activity.cc
@@ -0,0 +1,122 @@
+
+#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);
+}