fix haddock submodule pointer

[ghc-hetmet.git] / rts / Sparks.c

diff --git a/rts/Sparks.c b/rts/Sparks.c
index 0fe8b61..a826190 100644 (file)
--- a/rts/Sparks.c
+++ b/rts/Sparks.c
@@ -8,17 +8,11 @@
 
 #include "PosixSource.h"
 #include "Rts.h"
-#include "Storage.h"
+
 #include "Schedule.h"
-#include "SchedAPI.h"
-#include "RtsFlags.h"
 #include "RtsUtils.h"
-#include "ParTicky.h"
 #include "Trace.h"
 #include "Prelude.h"
-
-#include "SMP.h" // for cas
-
 #include "Sparks.h"
 
 #if defined(THREADED_RTS)
@@ -51,9 +45,9 @@ createSparkThread (Capability *cap)
     StgTSO *tso;
 
     tso = createIOThread (cap, RtsFlags.GcFlags.initialStkSize, 
-                          &base_GHCziConc_runSparks_closure);
+                          (StgClosure *)runSparks_closure);
 
-    postEvent(cap, EVENT_CREATE_SPARK_THREAD, 0, tso->id);
+    traceEventCreateSparkThread(cap, tso->id);
 
     appendToRunQueue(cap,tso);
 }
@@ -77,11 +71,10 @@ newSpark (StgRegTable *reg, StgClosure *p)
 
     if (closure_SHOULD_SPARK(p)) {
         pushWSDeque(pool,p);
-    }  
-
-    cap->sparks_created++;
-
-    postEvent(cap, EVENT_CREATE_SPARK, cap->r.rCurrentTSO->id, 0);
+        cap->sparks_created++;
+    } else {
+        cap->sparks_dud++;
+    }
 
     return 1;
 }
@@ -120,7 +113,7 @@ tryStealSpark (Capability *cap)
  * -------------------------------------------------------------------------- */
 
 void
-pruneSparkQueue (evac_fn evac, void *user, Capability *cap)
+pruneSparkQueue (Capability *cap)
 { 
     SparkPool *pool;
     StgClosurePtr spark, tmp, *elements;
@@ -128,8 +121,6 @@ pruneSparkQueue (evac_fn evac, void *user, Capability *cap)
     StgWord botInd,oldBotInd,currInd; // indices in array (always < size)
     const StgInfoTable *info;
     
-    PAR_TICKY_MARK_SPARK_QUEUE_START();
-    
     n = 0;
     pruned_sparks = 0;
     
@@ -148,7 +139,7 @@ pruneSparkQueue (evac_fn evac, void *user, Capability *cap)
     pool->top     &= pool->moduloSize;
     pool->topBound = pool->top;
 
-    debugTrace(DEBUG_sched,
+    debugTrace(DEBUG_sparks,
                "markSparkQueue: current spark queue len=%ld; (hd=%ld; tl=%ld)",
                sparkPoolSize(pool), pool->bottom, pool->top);
 
@@ -206,29 +197,59 @@ pruneSparkQueue (evac_fn evac, void *user, Capability *cap)
       // We have to be careful here: in the parallel GC, another
       // thread might evacuate this closure while we're looking at it,
       // so grab the info pointer just once.
-      info = spark->header.info;
-      if (IS_FORWARDING_PTR(info)) {
-          tmp = (StgClosure*)UN_FORWARDING_PTR(info);
-          /* if valuable work: shift inside the pool */
-          if (closure_SHOULD_SPARK(tmp)) {
-              elements[botInd] = tmp; // keep entry (new address)
-              botInd++;
-              n++;
-          } else {
-              pruned_sparks++; // discard spark
-              cap->sparks_pruned++;
-          }
+      if (GET_CLOSURE_TAG(spark) != 0) {
+          // Tagged pointer is a value, so the spark has fizzled.  It
+          // probably never happens that we get a tagged pointer in
+          // the spark pool, because we would have pruned the spark
+          // during the previous GC cycle if it turned out to be
+          // evaluated, but it doesn't hurt to have this check for
+          // robustness.
+          pruned_sparks++;
+          cap->sparks_fizzled++;
       } else {
-          if (!(closure_flags[INFO_PTR_TO_STRUCT(info)->type] & _NS)) {
-              elements[botInd] = spark; // keep entry (new address)
-              evac (user, &elements[botInd]);
-              botInd++;
-              n++;
+          info = spark->header.info;
+          if (IS_FORWARDING_PTR(info)) {
+              tmp = (StgClosure*)UN_FORWARDING_PTR(info);
+              /* if valuable work: shift inside the pool */
+              if (closure_SHOULD_SPARK(tmp)) {
+                  elements[botInd] = tmp; // keep entry (new address)
+                  botInd++;
+                  n++;
+              } else {
+                  pruned_sparks++; // discard spark
+                  cap->sparks_fizzled++;
+              }
+          } else if (HEAP_ALLOCED(spark)) {
+              if ((Bdescr((P_)spark)->flags & BF_EVACUATED)) {
+                  if (closure_SHOULD_SPARK(spark)) {
+                      elements[botInd] = spark; // keep entry (new address)
+                      botInd++;
+                      n++;
+                  } else {
+                      pruned_sparks++; // discard spark
+                      cap->sparks_fizzled++;
+                  }
+              } else {
+                  pruned_sparks++; // discard spark
+                  cap->sparks_gcd++;
+              }
           } else {
-              pruned_sparks++; // discard spark
-              cap->sparks_pruned++;
+              if (INFO_PTR_TO_STRUCT(info)->type == THUNK_STATIC) {
+                  if (*THUNK_STATIC_LINK(spark) != NULL) {
+                      elements[botInd] = spark; // keep entry (new address)
+                      botInd++;
+                      n++;
+                  } else {
+                      pruned_sparks++; // discard spark
+                      cap->sparks_gcd++;
+                  }
+              } else {
+                  pruned_sparks++; // discard spark
+                  cap->sparks_fizzled++;
+              }
           }
       }
+
       currInd++;
 
       // in the loop, we may reach the bounds, and instantly wrap around
@@ -246,11 +267,9 @@ pruneSparkQueue (evac_fn evac, void *user, Capability *cap)
     pool->bottom = (oldBotInd <= botInd) ? botInd : (botInd + pool->size); 
     // first free place we did not use (corrected by wraparound)
 
-    PAR_TICKY_MARK_SPARK_QUEUE_END(n);
-
-    debugTrace(DEBUG_sched, "pruned %d sparks", pruned_sparks);
+    debugTrace(DEBUG_sparks, "pruned %d sparks", pruned_sparks);
     
-    debugTrace(DEBUG_sched,
+    debugTrace(DEBUG_sparks,
                "new spark queue len=%ld; (hd=%ld; tl=%ld)",
                sparkPoolSize(pool), pool->bottom, pool->top);
 
@@ -284,7 +303,7 @@ traverseSparkQueue (evac_fn evac, void *user, Capability *cap)
       top++;
     }
 
-    debugTrace(DEBUG_sched,
+    debugTrace(DEBUG_sparks,
                "traversed spark queue, len=%ld; (hd=%ld; tl=%ld)",
                sparkPoolSize(pool), pool->bottom, pool->top);
 }
@@ -296,7 +315,8 @@ traverseSparkQueue (evac_fn evac, void *user, Capability *cap)
  *
  * Could be called after GC, before Cap. release, from scheduler. 
  * -------------------------------------------------------------------------- */
-void balanceSparkPoolsCaps(nat n_caps, Capability caps[]);
+void balanceSparkPoolsCaps(nat n_caps, Capability caps[])
+   GNUC3_ATTRIBUTE(__noreturn__);
 
 void balanceSparkPoolsCaps(nat n_caps STG_UNUSED, 
                            Capability caps[] STG_UNUSED) {