- reset idle manager stats after fork

README.md

@@ -27,7 +27,9 @@ In addition, the following students (in alphabetical order) have helped with var
 
 - Qin An (FreeBSD/kqueue)
 - Bilal Akhtar (gdb extension)
+- Peter Cai (bug fixes)
 - Peng Chen (split stack)
+- Bryant Curto (bug fixes)
 - Peiran Hong (API/Apache)
 - Matthew May (MCS queue with timeout)
 - Wen Shi (gdb extension)

src/libfibre/Cluster.cc

@@ -104,6 +104,7 @@ void Cluster::preFork(_friend<EventScope>) {
 
 void Cluster::postFork(cptr_t parent, _friend<EventScope> fes) {
   new (stats) FredStats::ClusterStats(this, parent);
+  idleManager.reset(this, fes);
   for (size_t p = 0; p < iPollCount; p += 1) {
     iPollVec[p].~PollerType();
     new (&iPollVec[p]) PollerType(scope, stagingProc, this, "I-Poller   ", _friend<Cluster>());

src/runtime/Scheduler.h

@@ -64,6 +64,10 @@ class IdleManager {
 public:
   IdleManager(cptr_t parent) : fredCounter(0) { stats = new FredStats::IdleManagerStats(this, parent); }
 
+  void reset(cptr_t parent, _friend<EventScope>) {
+    new (stats) FredStats::IdleManagerStats(this, parent);
+  }
+
   bool tryGetReadyFred() {
     ssize_t c = fredCounter;
     return (c > 0) && __atomic_compare_exchange_n(&fredCounter, &c, c-1, false, __ATOMIC_RELAXED, __ATOMIC_RELAXED);
@@ -92,6 +96,7 @@ public:
 class IdleManager {
 public:
   IdleManager(cptr_t) {}
+  void reset(cptr_t, _friend<EventScope>) {}
 };
 
 #endif