-/* -----------------------------------------------------------------------------
- * $Id: Sparks.c,v 1.1 2000/01/12 15:15:18 simonmar Exp $
+/* ---------------------------------------------------------------------------
+ * $Id: Sparks.c,v 1.6 2003/03/25 17:58:50 sof Exp $
*
* (c) The GHC Team, 2000
*
* Sparking support for PAR and SMP versions of the RTS.
*
- * ---------------------------------------------------------------------------*/
+ * -------------------------------------------------------------------------*/
-#if defined(SMP) || defined(PAR)
+//@node Spark Management Routines, , ,
+//@section Spark Management Routines
+//@menu
+//* Includes::
+//* GUM code::
+//* GranSim code::
+//@end menu
+//*/
+
+//@node Includes, GUM code, Spark Management Routines, Spark Management Routines
+//@subsection Includes
+
+#include "PosixSource.h"
#include "Rts.h"
#include "Schedule.h"
#include "SchedAPI.h"
-#include "Sparks.h"
#include "Storage.h"
#include "RtsFlags.h"
#include "RtsUtils.h"
+#include "ParTicky.h"
+# if defined(PAR)
+# include "ParallelRts.h"
+# include "GranSimRts.h" // for GR_...
+# elif defined(GRAN)
+# include "GranSimRts.h"
+# endif
+#include "Sparks.h"
+
+#if /*defined(SMP) ||*/ defined(PAR)
+
+//@node GUM code, GranSim code, Includes, Spark Management Routines
+//@subsection GUM code
static void slide_spark_pool( StgSparkPool *pool );
-void
+rtsBool
initSparkPools( void )
{
Capability *cap;
pool->hd = pool->base;
pool->tl = pool->base;
}
+ return rtsTrue; /* Qapla' */
}
+/*
+ We traverse the spark pool until we find the 2nd usable (i.e. non-NF)
+ spark. Rationale, we don't want to give away the only work a PE has.
+ ToDo: introduce low- and high-water-marks for load balancing.
+*/
StgClosure *
-findSpark( void )
+findSpark( rtsBool for_export )
{
Capability *cap;
StgSparkPool *pool;
- StgClosure *spark;
+ StgClosure *spark, *first=NULL;
+ rtsBool isIdlePE = EMPTY_RUN_QUEUE();
#ifdef SMP
/* walk over the capabilities, allocating a spark pool for each one */
pool = &(cap->rSparks);
while (pool->hd < pool->tl) {
spark = *pool->hd++;
- if (closure_SHOULD_SPARK(spark))
- return spark;
+ if (closure_SHOULD_SPARK(spark)) {
+ if (for_export && isIdlePE) {
+ if (first==NULL) {
+ first = spark; // keep the first usable spark if PE is idle
+ } else {
+ pool->hd--; // found a second spark; keep it in the pool
+ ASSERT(*pool->hd==spark);
+ if (RtsFlags.ParFlags.ParStats.Sparks)
+ DumpRawGranEvent(CURRENT_PROC, CURRENT_PROC,
+ GR_STEALING, ((StgTSO *)NULL), first,
+ 0, 0 /* spark_queue_len(ADVISORY_POOL) */);
+ return first; // and return the *first* spark found
+ }
+ } else {
+ if (RtsFlags.ParFlags.ParStats.Sparks && for_export)
+ DumpRawGranEvent(CURRENT_PROC, CURRENT_PROC,
+ GR_STEALING, ((StgTSO *)NULL), spark,
+ 0, 0 /* spark_queue_len(ADVISORY_POOL) */);
+ return spark; // return first spark found
+ }
+ }
}
slide_spark_pool(pool);
}
return NULL;
}
-
+
+/*
+ activateSpark is defined in Schedule.c
+*/
rtsBool
add_to_spark_queue( StgClosure *closure, StgSparkPool *pool )
{
if (closure_SHOULD_SPARK(closure) &&
pool->tl < pool->lim) {
*(pool->tl++) = closure;
+
+#if defined(PAR)
+ // collect parallel global statistics (currently done together with GC stats)
+ if (RtsFlags.ParFlags.ParStats.Global &&
+ RtsFlags.GcFlags.giveStats > NO_GC_STATS) {
+ // fprintf(stderr, "Creating spark for %x @ %11.2f\n", closure, usertime());
+ globalParStats.tot_sparks_created++;
+ }
+#endif
return rtsTrue;
} else {
+#if defined(PAR)
+ // collect parallel global statistics (currently done together with GC stats)
+ if (RtsFlags.ParFlags.ParStats.Global &&
+ RtsFlags.GcFlags.giveStats > NO_GC_STATS) {
+ //fprintf(stderr, "Ignoring spark for %x @ %11.2f\n", closure, usertime());
+ globalParStats.tot_sparks_ignored++;
+ }
+#endif
return rtsFalse;
}
}
pool->tl = to_sparkp;
}
-static inline nat
+nat
spark_queue_len( StgSparkPool *pool )
{
return (nat) (pool->tl - pool->hd);
markSparkQueue( void )
{
StgClosure **sparkp, **to_sparkp;
-#ifdef DEBUG
- nat n, pruned_sparks;
-#endif
+ nat n, pruned_sparks; // stats only
StgSparkPool *pool;
Capability *cap;
+ PAR_TICKY_MARK_SPARK_QUEUE_START();
+
#ifdef SMP
/* walk over the capabilities, allocating a spark pool for each one */
for (cap = free_capabilities; cap != NULL; cap = cap->link) {
{
#endif
pool = &(cap->rSparks);
-
-#ifdef DEBUG
+
+#if defined(PAR)
+ // stats only
n = 0;
pruned_sparks = 0;
#endif
if (closure_SHOULD_SPARK(*sparkp)) {
*to_sparkp = MarkRoot(*sparkp);
to_sparkp++;
-#ifdef DEBUG
+#ifdef PAR
n++;
#endif
} else {
-#ifdef DEBUG
+#ifdef PAR
pruned_sparks++;
#endif
}
pool->hd = pool->base;
pool->tl = to_sparkp;
+ PAR_TICKY_MARK_SPARK_QUEUE_END(n);
+
#if defined(SMP)
IF_DEBUG(scheduler,
belch("markSparkQueue: marked %d sparks and pruned %d sparks on [%x]",
}
}
-#endif /* SMP || PAR */
+void
+disposeSpark(spark)
+StgClosure *spark;
+{
+#if !defined(SMP)
+ Capability *cap;
+ StgSparkPool *pool;
+
+ cap = &MainRegTable;
+ pool = &(cap->rSparks);
+ ASSERT(pool->hd <= pool->tl && pool->tl <= pool->lim);
+#endif
+ ASSERT(spark != (StgClosure *)NULL);
+ /* Do nothing */
+}
+
+
+#elif defined(GRAN)
+
+//@node GranSim code, , GUM code, Spark Management Routines
+//@subsection GranSim code
+
+//@menu
+//* Basic interface to sparkq::
+//* Aux fcts::
+//@end menu
+
+//@node Basic interface to sparkq, Aux fcts, GranSim code, GranSim code
+//@subsubsection Basic interface to sparkq
+/*
+ Search the spark queue of the proc in event for a spark that's worth
+ turning into a thread
+ (was gimme_spark in the old RTS)
+*/
+//@cindex findLocalSpark
+void
+findLocalSpark (rtsEvent *event, rtsBool *found_res, rtsSparkQ *spark_res)
+{
+ PEs proc = event->proc, /* proc to search for work */
+ creator = event->creator; /* proc that requested work */
+ StgClosure* node;
+ rtsBool found;
+ rtsSparkQ spark_of_non_local_node = NULL,
+ spark_of_non_local_node_prev = NULL,
+ low_priority_spark = NULL,
+ low_priority_spark_prev = NULL,
+ spark = NULL, prev = NULL;
+
+ /* Choose a spark from the local spark queue */
+ prev = (rtsSpark*)NULL;
+ spark = pending_sparks_hds[proc];
+ found = rtsFalse;
+
+ // ToDo: check this code & implement local sparking !! -- HWL
+ while (!found && spark != (rtsSpark*)NULL)
+ {
+ ASSERT((prev!=(rtsSpark*)NULL || spark==pending_sparks_hds[proc]) &&
+ (prev==(rtsSpark*)NULL || prev->next==spark) &&
+ (spark->prev==prev));
+ node = spark->node;
+ if (!closure_SHOULD_SPARK(node))
+ {
+ IF_GRAN_DEBUG(checkSparkQ,
+ belch("^^ pruning spark %p (node %p) in gimme_spark",
+ spark, node));
+
+ if (RtsFlags.GranFlags.GranSimStats.Sparks)
+ DumpRawGranEvent(proc, (PEs)0, SP_PRUNED,(StgTSO*)NULL,
+ spark->node, spark->name, spark_queue_len(proc));
+
+ ASSERT(spark != (rtsSpark*)NULL);
+ ASSERT(SparksAvail>0);
+ --SparksAvail;
+
+ ASSERT(prev==(rtsSpark*)NULL || prev->next==spark);
+ spark = delete_from_sparkq (spark, proc, rtsTrue);
+ if (spark != (rtsSpark*)NULL)
+ prev = spark->prev;
+ continue;
+ }
+ /* -- node should eventually be sparked */
+ else if (RtsFlags.GranFlags.PreferSparksOfLocalNodes &&
+ !IS_LOCAL_TO(PROCS(node),CurrentProc))
+ {
+ barf("Local sparking not yet implemented");
+
+ /* Remember first low priority spark */
+ if (spark_of_non_local_node==(rtsSpark*)NULL) {
+ spark_of_non_local_node_prev = prev;
+ spark_of_non_local_node = spark;
+ }
+
+ if (spark->next == (rtsSpark*)NULL) {
+ /* ASSERT(spark==SparkQueueTl); just for testing */
+ prev = spark_of_non_local_node_prev;
+ spark = spark_of_non_local_node;
+ found = rtsTrue;
+ break;
+ }
+
+# if defined(GRAN) && defined(GRAN_CHECK)
+ /* Should never happen; just for testing
+ if (spark==pending_sparks_tl) {
+ fprintf(stderr,"ReSchedule: Last spark != SparkQueueTl\n");
+ stg_exit(EXIT_FAILURE);
+ } */
+# endif
+ prev = spark;
+ spark = spark->next;
+ ASSERT(SparksAvail>0);
+ --SparksAvail;
+ continue;
+ }
+ else if ( RtsFlags.GranFlags.DoPrioritySparking ||
+ (spark->gran_info >= RtsFlags.GranFlags.SparkPriority2) )
+ {
+ if (RtsFlags.GranFlags.DoPrioritySparking)
+ barf("Priority sparking not yet implemented");
+
+ found = rtsTrue;
+ }
+#if 0
+ else /* only used if SparkPriority2 is defined */
+ {
+ /* ToDo: fix the code below and re-integrate it */
+ /* Remember first low priority spark */
+ if (low_priority_spark==(rtsSpark*)NULL) {
+ low_priority_spark_prev = prev;
+ low_priority_spark = spark;
+ }
+
+ if (spark->next == (rtsSpark*)NULL) {
+ /* ASSERT(spark==spark_queue_tl); just for testing */
+ prev = low_priority_spark_prev;
+ spark = low_priority_spark;
+ found = rtsTrue; /* take low pri spark => rc is 2 */
+ break;
+ }
+
+ /* Should never happen; just for testing
+ if (spark==pending_sparks_tl) {
+ fprintf(stderr,"ReSchedule: Last spark != SparkQueueTl\n");
+ stg_exit(EXIT_FAILURE);
+ break;
+ } */
+ prev = spark;
+ spark = spark->next;
+
+ IF_GRAN_DEBUG(pri,
+ belch("++ Ignoring spark of priority %u (SparkPriority=%u); node=%p; name=%u\n",
+ spark->gran_info, RtsFlags.GranFlags.SparkPriority,
+ spark->node, spark->name);)
+ }
+#endif
+ } /* while (spark!=NULL && !found) */
+
+ *spark_res = spark;
+ *found_res = found;
+}
+
+/*
+ Turn the spark into a thread.
+ In GranSim this basically means scheduling a StartThread event for the
+ node pointed to by the spark at some point in the future.
+ (was munch_spark in the old RTS)
+*/
+//@cindex activateSpark
+rtsBool
+activateSpark (rtsEvent *event, rtsSparkQ spark)
+{
+ PEs proc = event->proc, /* proc to search for work */
+ creator = event->creator; /* proc that requested work */
+ StgTSO* tso;
+ StgClosure* node;
+ rtsTime spark_arrival_time;
+
+ /*
+ We've found a node on PE proc requested by PE creator.
+ If proc==creator we can turn the spark into a thread immediately;
+ otherwise we schedule a MoveSpark event on the requesting PE
+ */
+
+ /* DaH Qu' yIchen */
+ if (proc!=creator) {
+
+ /* only possible if we simulate GUM style fishing */
+ ASSERT(RtsFlags.GranFlags.Fishing);
+
+ /* Message packing costs for sending a Fish; qeq jabbI'ID */
+ CurrentTime[proc] += RtsFlags.GranFlags.Costs.mpacktime;
+
+ if (RtsFlags.GranFlags.GranSimStats.Sparks)
+ DumpRawGranEvent(proc, (PEs)0, SP_EXPORTED,
+ (StgTSO*)NULL, spark->node,
+ spark->name, spark_queue_len(proc));
+
+ /* time of the spark arrival on the remote PE */
+ spark_arrival_time = CurrentTime[proc] + RtsFlags.GranFlags.Costs.latency;
+
+ new_event(creator, proc, spark_arrival_time,
+ MoveSpark,
+ (StgTSO*)NULL, spark->node, spark);
+
+ CurrentTime[proc] += RtsFlags.GranFlags.Costs.mtidytime;
+
+ } else { /* proc==creator i.e. turn the spark into a thread */
+
+ if ( RtsFlags.GranFlags.GranSimStats.Global &&
+ spark->gran_info < RtsFlags.GranFlags.SparkPriority2 ) {
+
+ globalGranStats.tot_low_pri_sparks++;
+ IF_GRAN_DEBUG(pri,
+ belch("++ No high priority spark available; low priority (%u) spark chosen: node=%p; name=%u\n",
+ spark->gran_info,
+ spark->node, spark->name));
+ }
+
+ CurrentTime[proc] += RtsFlags.GranFlags.Costs.threadcreatetime;
+
+ node = spark->node;
+
+# if 0
+ /* ToDo: fix the GC interface and move to StartThread handling-- HWL */
+ if (GARBAGE COLLECTION IS NECESSARY) {
+ /* Some kind of backoff needed here in case there's too little heap */
+# if defined(GRAN_CHECK) && defined(GRAN)
+ if (RtsFlags.GcFlags.giveStats)
+ fprintf(RtsFlags.GcFlags.statsFile,"***** vIS Qu' chen veQ boSwI'; spark=%p, node=%p; name=%u\n",
+ /* (found==2 ? "no hi pri spark" : "hi pri spark"), */
+ spark, node, spark->name);
+# endif
+ new_event(CurrentProc, CurrentProc, CurrentTime[CurrentProc]+1,
+ FindWork,
+ (StgTSO*)NULL, (StgClosure*)NULL, (rtsSpark*)NULL);
+ barf("//// activateSpark: out of heap ; ToDo: call GarbageCollect()");
+ GarbageCollect(GetRoots, rtsFalse);
+ // HWL old: ReallyPerformThreadGC(TSO_HS+TSO_CTS_SIZE,rtsFalse);
+ // HWL old: SAVE_Hp -= TSO_HS+TSO_CTS_SIZE;
+ spark = NULL;
+ return; /* was: continue; */ /* to the next event, eventually */
+ }
+# endif
+
+ if (RtsFlags.GranFlags.GranSimStats.Sparks)
+ DumpRawGranEvent(CurrentProc,(PEs)0,SP_USED,(StgTSO*)NULL,
+ spark->node, spark->name,
+ spark_queue_len(CurrentProc));
+
+ new_event(proc, proc, CurrentTime[proc],
+ StartThread,
+ END_TSO_QUEUE, node, spark); // (rtsSpark*)NULL);
+
+ procStatus[proc] = Starting;
+ }
+}
+
+/* -------------------------------------------------------------------------
+ This is the main point where handling granularity information comes into
+ play.
+ ------------------------------------------------------------------------- */
+
+#define MAX_RAND_PRI 100
+
+/*
+ Granularity info transformers.
+ Applied to the GRAN_INFO field of a spark.
+*/
+static inline nat ID(nat x) { return(x); };
+static inline nat INV(nat x) { return(-x); };
+static inline nat IGNORE(nat x) { return (0); };
+static inline nat RAND(nat x) { return ((random() % MAX_RAND_PRI) + 1); }
+
+/* NB: size_info and par_info are currently unused (what a shame!) -- HWL */
+//@cindex newSpark
+rtsSpark *
+newSpark(node,name,gran_info,size_info,par_info,local)
+StgClosure *node;
+nat name, gran_info, size_info, par_info, local;
+{
+ nat pri;
+ rtsSpark *newspark;
+
+ pri = RtsFlags.GranFlags.RandomPriorities ? RAND(gran_info) :
+ RtsFlags.GranFlags.InversePriorities ? INV(gran_info) :
+ RtsFlags.GranFlags.IgnorePriorities ? IGNORE(gran_info) :
+ ID(gran_info);
+
+ if ( RtsFlags.GranFlags.SparkPriority!=0 &&
+ pri<RtsFlags.GranFlags.SparkPriority ) {
+ IF_GRAN_DEBUG(pri,
+ belch(",, NewSpark: Ignoring spark of priority %u (SparkPriority=%u); node=%#x; name=%u\n",
+ pri, RtsFlags.GranFlags.SparkPriority, node, name));
+ return ((rtsSpark*)NULL);
+ }
-#if defined(GRAN)
+ newspark = (rtsSpark*) stgMallocBytes(sizeof(rtsSpark), "NewSpark");
+ newspark->prev = newspark->next = (rtsSpark*)NULL;
+ newspark->node = node;
+ newspark->name = (name==1) ? CurrentTSO->gran.sparkname : name;
+ newspark->gran_info = pri;
+ newspark->global = !local; /* Check that with parAt, parAtAbs !!*/
-... ToDo ...
+ if (RtsFlags.GranFlags.GranSimStats.Global) {
+ globalGranStats.tot_sparks_created++;
+ globalGranStats.sparks_created_on_PE[CurrentProc]++;
+ }
+
+ return(newspark);
+}
+
+//@cindex disposeSpark
+void
+disposeSpark(spark)
+rtsSpark *spark;
+{
+ ASSERT(spark!=NULL);
+ stgFree(spark);
+}
+
+//@cindex disposeSparkQ
+void
+disposeSparkQ(spark)
+rtsSparkQ spark;
+{
+ if (spark==NULL)
+ return;
+
+ disposeSparkQ(spark->next);
+
+# ifdef GRAN_CHECK
+ if (SparksAvail < 0) {
+ fprintf(stderr,"disposeSparkQ: SparksAvail<0 after disposing sparkq @ %p\n", &spark);
+ print_spark(spark);
+ }
+# endif
+
+ stgFree(spark);
+}
+
+/*
+ With PrioritySparking add_to_spark_queue performs an insert sort to keep
+ the spark queue sorted. Otherwise the spark is just added to the end of
+ the queue.
+*/
+
+//@cindex add_to_spark_queue
+void
+add_to_spark_queue(spark)
+rtsSpark *spark;
+{
+ rtsSpark *prev = NULL, *next = NULL;
+ nat count = 0;
+ rtsBool found = rtsFalse;
+
+ if ( spark == (rtsSpark *)NULL ) {
+ return;
+ }
+
+ if (RtsFlags.GranFlags.DoPrioritySparking && (spark->gran_info != 0) ) {
+ /* Priority sparking is enabled i.e. spark queues must be sorted */
+
+ for (prev = NULL, next = pending_sparks_hd, count=0;
+ (next != NULL) &&
+ !(found = (spark->gran_info >= next->gran_info));
+ prev = next, next = next->next, count++)
+ {}
+
+ } else { /* 'utQo' */
+ /* Priority sparking is disabled */
+
+ found = rtsFalse; /* to add it at the end */
+
+ }
+
+ if (found) {
+ /* next points to the first spark with a gran_info smaller than that
+ of spark; therefore, add spark before next into the spark queue */
+ spark->next = next;
+ if ( next == NULL ) {
+ pending_sparks_tl = spark;
+ } else {
+ next->prev = spark;
+ }
+ spark->prev = prev;
+ if ( prev == NULL ) {
+ pending_sparks_hd = spark;
+ } else {
+ prev->next = spark;
+ }
+ } else { /* (RtsFlags.GranFlags.DoPrioritySparking && !found) || !DoPrioritySparking */
+ /* add the spark at the end of the spark queue */
+ spark->next = NULL;
+ spark->prev = pending_sparks_tl;
+ if (pending_sparks_hd == NULL)
+ pending_sparks_hd = spark;
+ else
+ pending_sparks_tl->next = spark;
+ pending_sparks_tl = spark;
+ }
+ ++SparksAvail;
+
+ /* add costs for search in priority sparking */
+ if (RtsFlags.GranFlags.DoPrioritySparking) {
+ CurrentTime[CurrentProc] += count * RtsFlags.GranFlags.Costs.pri_spark_overhead;
+ }
+
+ IF_GRAN_DEBUG(checkSparkQ,
+ belch("++ Spark stats after adding spark %p (node %p) to queue on PE %d",
+ spark, spark->node, CurrentProc);
+ print_sparkq_stats());
+
+# if defined(GRAN_CHECK)
+ if (RtsFlags.GranFlags.Debug.checkSparkQ) {
+ for (prev = NULL, next = pending_sparks_hd;
+ (next != NULL);
+ prev = next, next = next->next)
+ {}
+ if ( (prev!=NULL) && (prev!=pending_sparks_tl) )
+ fprintf(stderr,"SparkQ inconsistency after adding spark %p: (PE %u) pending_sparks_tl (%p) not end of queue (%p)\n",
+ spark,CurrentProc,
+ pending_sparks_tl, prev);
+ }
+# endif
+
+# if defined(GRAN_CHECK)
+ /* Check if the sparkq is still sorted. Just for testing, really! */
+ if ( RtsFlags.GranFlags.Debug.checkSparkQ &&
+ RtsFlags.GranFlags.Debug.pri ) {
+ rtsBool sorted = rtsTrue;
+ rtsSpark *prev, *next;
+
+ if (pending_sparks_hd == NULL ||
+ pending_sparks_hd->next == NULL ) {
+ /* just 1 elem => ok */
+ } else {
+ for (prev = pending_sparks_hd,
+ next = pending_sparks_hd->next;
+ (next != NULL) ;
+ prev = next, next = next->next) {
+ sorted = sorted &&
+ (prev->gran_info >= next->gran_info);
+ }
+ }
+ if (!sorted) {
+ fprintf(stderr,"ghuH: SPARKQ on PE %d is not sorted:\n",
+ CurrentProc);
+ print_sparkq(CurrentProc);
+ }
+ }
+# endif
+}
+
+//@node Aux fcts, , Basic interface to sparkq, GranSim code
+//@subsubsection Aux fcts
+
+//@cindex spark_queue_len
+nat
+spark_queue_len(proc)
+PEs proc;
+{
+ rtsSpark *prev, *spark; /* prev only for testing !! */
+ nat len;
+
+ for (len = 0, prev = NULL, spark = pending_sparks_hds[proc];
+ spark != NULL;
+ len++, prev = spark, spark = spark->next)
+ {}
+
+# if defined(GRAN_CHECK)
+ if ( RtsFlags.GranFlags.Debug.checkSparkQ )
+ if ( (prev!=NULL) && (prev!=pending_sparks_tls[proc]) )
+ fprintf(stderr,"ERROR in spark_queue_len: (PE %u) pending_sparks_tl (%p) not end of queue (%p)\n",
+ proc, pending_sparks_tls[proc], prev);
+# endif
+
+ return (len);
+}
+
+/*
+ Take spark out of the spark queue on PE p and nuke the spark. Adjusts
+ hd and tl pointers of the spark queue. Returns a pointer to the next
+ spark in the queue.
+*/
+//@cindex delete_from_sparkq
+rtsSpark *
+delete_from_sparkq (spark, p, dispose_too) /* unlink and dispose spark */
+rtsSpark *spark;
+PEs p;
+rtsBool dispose_too;
+{
+ rtsSpark *new_spark;
+
+ if (spark==NULL)
+ barf("delete_from_sparkq: trying to delete NULL spark\n");
+
+# if defined(GRAN_CHECK)
+ if ( RtsFlags.GranFlags.Debug.checkSparkQ ) {
+ fprintf(stderr,"## |%p:%p| (%p)<-spark=%p->(%p) <-(%p)\n",
+ pending_sparks_hd, pending_sparks_tl,
+ spark->prev, spark, spark->next,
+ (spark->next==NULL ? 0 : spark->next->prev));
+ }
+# endif
+
+ if (spark->prev==NULL) {
+ /* spark is first spark of queue => adjust hd pointer */
+ ASSERT(pending_sparks_hds[p]==spark);
+ pending_sparks_hds[p] = spark->next;
+ } else {
+ spark->prev->next = spark->next;
+ }
+ if (spark->next==NULL) {
+ ASSERT(pending_sparks_tls[p]==spark);
+ /* spark is first spark of queue => adjust tl pointer */
+ pending_sparks_tls[p] = spark->prev;
+ } else {
+ spark->next->prev = spark->prev;
+ }
+ new_spark = spark->next;
+
+# if defined(GRAN_CHECK)
+ if ( RtsFlags.GranFlags.Debug.checkSparkQ ) {
+ fprintf(stderr,"## |%p:%p| (%p)<-spark=%p->(%p) <-(%p); spark=%p will be deleted NOW \n",
+ pending_sparks_hd, pending_sparks_tl,
+ spark->prev, spark, spark->next,
+ (spark->next==NULL ? 0 : spark->next->prev), spark);
+ }
+# endif
+
+ if (dispose_too)
+ disposeSpark(spark);
+
+ return new_spark;
+}
+
+/* Mark all nodes pointed to by sparks in the spark queues (for GC) */
+//@cindex markSparkQueue
+void
+markSparkQueue(void)
+{
+ StgClosure *MarkRoot(StgClosure *root); // prototype
+ PEs p;
+ rtsSpark *sp;
+
+ for (p=0; p<RtsFlags.GranFlags.proc; p++)
+ for (sp=pending_sparks_hds[p]; sp!=NULL; sp=sp->next) {
+ ASSERT(sp->node!=NULL);
+ ASSERT(LOOKS_LIKE_GHC_INFO(sp->node->header.info));
+ // ToDo?: statistics gathering here (also for GUM!)
+ sp->node = (StgClosure *)MarkRoot(sp->node);
+ }
+ IF_DEBUG(gc,
+ belch("@@ markSparkQueue: spark statistics at start of GC:");
+ print_sparkq_stats());
+}
+
+//@cindex print_spark
+void
+print_spark(spark)
+rtsSpark *spark;
+{
+ char str[16];
+
+ if (spark==NULL) {
+ fprintf(stderr,"Spark: NIL\n");
+ return;
+ } else {
+ sprintf(str,
+ ((spark->node==NULL) ? "______" : "%#6lx"),
+ stgCast(StgPtr,spark->node));
+
+ fprintf(stderr,"Spark: Node %8s, Name %#6x, Global %5s, Creator %5x, Prev %6p, Next %6p\n",
+ str, spark->name,
+ ((spark->global)==rtsTrue?"True":"False"), spark->creator,
+ spark->prev, spark->next);
+ }
+}
+
+//@cindex print_sparkq
+void
+print_sparkq(proc)
+PEs proc;
+// rtsSpark *hd;
+{
+ rtsSpark *x = pending_sparks_hds[proc];
+
+ fprintf(stderr,"Spark Queue of PE %d with root at %p:\n", proc, x);
+ for (; x!=(rtsSpark*)NULL; x=x->next) {
+ print_spark(x);
+ }
+}
+
+/*
+ Print a statistics of all spark queues.
+*/
+//@cindex print_sparkq_stats
+void
+print_sparkq_stats(void)
+{
+ PEs p;
+
+ fprintf(stderr, "SparkQs: [");
+ for (p=0; p<RtsFlags.GranFlags.proc; p++)
+ fprintf(stderr, ", PE %d: %d", p, spark_queue_len(p));
+ fprintf(stderr, "\n");
+}
#endif
projects / ghc-hetmet.git / blobdiff