ruby: profiler: lots of inter-related changes

The patch started of with removing the global variables from the profiler for
profiling the miss latency of requests made to the cache. The corrresponding
histograms have been moved to the Sequencer. These are combined together when
the histograms are printed. Separate histograms are now maintained for
tracking latency of all requests together, of hits only and of misses only.

A particular set of histograms used to use the type GenericMachineType defined
in one of the protocol files. This patch removes this type. Now, everything
that relied on this type would use MachineType instead. To do this, SLICC has
been changed so that multiple machine types can be declared by a controller
in its preamble.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/mem/ruby/common/Histogram.cc b/src/mem/ruby/common/Histogram.cc
index 0558e5198..e377bc253 100644
--- a/src/mem/ruby/common/Histogram.cc
+++ b/src/mem/ruby/common/Histogram.cc
@@ -124,7 +124,12 @@ Histogram::add(Histogram& hist)
     uint32_t t_bins = m_data.size();
 
     if (hist.getBins() != t_bins) {
-        fatal("Histograms with different number of bins cannot be combined!");
+        if (m_count == 0) {
+            m_data.resize(hist.getBins());
+        } else {
+            fatal("Histograms with different number of bins "
+                  "cannot be combined!");
+        }
     }
 
     m_max = max(m_max, hist.getMax());