runtime: track barrier rate

Author: nickwanninger

runtime/core/Runtime.cpp

@@ -66,12 +66,12 @@ namespace alaska {
 #undef xstr
 #undef str
 
-    for (auto *tc: this->tcs) {
-      fprintf(stream, "tc%d allocations:%zu, rate:%.1f/s", tc->id, tc->allocation_rate.read(), tc->allocation_rate.digest());
-
+    fprintf(stream, "barriers: %zu, rate:%.1f/s\n", stat_barriers.read(), stat_barriers.digest());
 
+    for (auto *tc : this->tcs) {
+      fprintf(stream, "tc%d allocations:%zu, rate:%.1f/s", tc->id, tc->allocation_rate.read(),
+          tc->allocation_rate.digest());
       fprintf(stream, " frees:%zu, rate:%.1f/s", tc->free_rate.read(), tc->free_rate.digest());
-
       fprintf(stream, "\n");
     }
     // handle_table.dump(stream);

runtime/include/alaska/Runtime.hpp

@@ -56,6 +56,7 @@ namespace alaska {
     // A pointer to the runtime's current barrier manager.
     // This is defaulted to a "nop" manager which simply does nothing.
     alaska::BarrierManager *barrier_manager;
+    alaska::RateCounter stat_barriers;
 
     // Return the singleton instance of the Runtime if it has been allocated. Abort otherwise.
     static Runtime &get();
@@ -96,6 +97,7 @@ namespace alaska {
       lock_all_thread_caches();
       if (barrier_manager->begin()) {
         in_barrier = true;
+        stat_barriers++;
         barrier_manager->barrier_count++;
         cb();
         in_barrier = false;