/* ---------------------------------------------------------------------------
- * $Id: Schedule.c,v 1.93 2001/03/02 16:15:53 simonmar Exp $
+ * $Id: Schedule.c,v 1.95 2001/03/23 16:36:21 simonmar Exp $
*
* (c) The GHC Team, 1998-2000
*
* Scheduler
*
- * The main scheduling code in GranSim is quite different from that in std
- * (concurrent) Haskell: while concurrent Haskell just iterates over the
- * threads in the runnable queue, GranSim is event driven, i.e. it iterates
- * over the events in the global event queue. -- HWL
+ * Different GHC ways use this scheduler quite differently (see comments below)
+ * Here is the global picture:
+ *
+ * WAY Name CPP flag What's it for
+ * --------------------------------------
+ * mp GUM PAR Parallel execution on a distributed memory machine
+ * s SMP SMP Parallel execution on a shared memory machine
+ * mg GranSim GRAN Simulation of parallel execution
+ * md GUM/GdH DIST Distributed execution (based on GUM)
* --------------------------------------------------------------------------*/
//@node Main scheduling code, , ,
//@section Main scheduling code
-/* Version with scheduler monitor support for SMPs.
+/*
+ * Version with scheduler monitor support for SMPs (WAY=s):
This design provides a high-level API to create and schedule threads etc.
as documented in the SMP design document.
In a non-SMP build, there is one global capability, namely MainRegTable.
SDM & KH, 10/99
+
+ * Version with support for distributed memory parallelism aka GUM (WAY=mp):
+
+ The main scheduling loop in GUM iterates until a finish message is received.
+ In that case a global flag @receivedFinish@ is set and this instance of
+ the RTS shuts down. See ghc/rts/parallel/HLComms.c:processMessages()
+ for the handling of incoming messages, such as PP_FINISH.
+ Note that in the parallel case we have a system manager that coordinates
+ different PEs, each of which are running one instance of the RTS.
+ See ghc/rts/parallel/SysMan.c for the main routine of the parallel program.
+ From this routine processes executing ghc/rts/Main.c are spawned. -- HWL
+
+ * Version with support for simulating parallel execution aka GranSim (WAY=mg):
+
+ The main scheduling code in GranSim is quite different from that in std
+ (concurrent) Haskell: while concurrent Haskell just iterates over the
+ threads in the runnable queue, GranSim is event driven, i.e. it iterates
+ over the events in the global event queue. -- HWL
*/
//@menu
#if defined(PAR)
StgTSO *LastTSO;
rtsTime TimeOfLastYield;
+rtsBool emitSchedule = rtsTrue;
#endif
#if DEBUG
};
#endif
+#ifdef PAR
+StgTSO * createSparkThread(rtsSpark spark);
+StgTSO * activateSpark (rtsSpark spark);
+#endif
+
/*
* The thread state for the main thread.
// ToDo: check whether not needed any more
rtsSpark spark;
StgTSO *tso;
GlobalTaskId pe;
+ rtsBool receivedFinish = rtsFalse;
+# if defined(DEBUG)
+ nat tp_size, sp_size; // stats only
+# endif
#endif
rtsBool was_interrupted = rtsFalse;
#elif defined(PAR)
- while (!GlobalStopPending) { /* GlobalStopPending set in par_exit */
-
+ while (!receivedFinish) { /* set by processMessages */
+ /* when receiving PP_FINISH message */
#else
while (1) {
for (; n > 0; n--) {
StgClosure *spark;
- spark = findSpark();
+ spark = findSpark(rtsFalse);
if (spark == NULL) {
break; /* no more sparks in the pool */
} else {
/* I'd prefer this to be done in activateSpark -- HWL */
/* tricky - it needs to hold the scheduler lock and
* not try to re-acquire it -- SDM */
- StgTSO *tso;
- tso = createThread_(RtsFlags.GcFlags.initialStkSize, rtsTrue);
- pushClosure(tso,spark);
- PUSH_ON_RUN_QUEUE(tso);
-#ifdef PAR
- advisory_thread_count++;
-#endif
-
+ createSparkThread(spark);
IF_DEBUG(scheduler,
- sched_belch("turning spark of closure %p into a thread",
+ sched_belch("==^^ turning spark of closure %p into a thread",
(StgClosure *)spark));
}
}
main_threads = NULL;
}
}
+#elif defined(PAR)
+ /* ToDo: add deadlock detection in GUM (similar to SMP) -- HWL */
#else /* ! SMP */
if (blocked_queue_hd == END_TSO_QUEUE
&& run_queue_hd == END_TSO_QUEUE
if (!RtsFlags.GranFlags.Light)
handleIdlePEs();
- IF_DEBUG(gran, fprintf(stderr, "GRAN: switch by event-type\n"))
+ IF_DEBUG(gran, fprintf(stderr, "GRAN: switch by event-type\n"));
/* main event dispatcher in GranSim */
switch (event->evttype) {
IF_DEBUG(gran,
fprintf(stderr, "GRAN: About to run current thread, which is\n");
- G_TSO(t,5))
+ G_TSO(t,5));
context_switch = 0; // turned on via GranYield, checking events and time slice
procStatus[CurrentProc] = Busy;
#elif defined(PAR)
-
if (PendingFetches != END_BF_QUEUE) {
processFetches();
}
/* ToDo: phps merge with spark activation above */
/* check whether we have local work and send requests if we have none */
- if (run_queue_hd == END_TSO_QUEUE) { /* no runnable threads */
+ if (EMPTY_RUN_QUEUE()) { /* no runnable threads */
/* :-[ no local threads => look out for local sparks */
/* the spark pool for the current PE */
pool = &(MainRegTable.rSparks); // generalise to cap = &MainRegTable
* to turn one of those pending sparks into a
* thread...
*/
-
- spark = findSpark(); /* get a spark */
+
+ spark = findSpark(rtsFalse); /* get a spark */
if (spark != (rtsSpark) NULL) {
tso = activateSpark(spark); /* turn the spark into a thread */
IF_PAR_DEBUG(schedule,
spark_queue_len(pool)));
goto next_thread;
}
- } else
+ }
+
+ /* If we still have no work we need to send a FISH to get a spark
+ from another PE
+ */
+ if (EMPTY_RUN_QUEUE()) {
/* =8-[ no local sparks => look for work on other PEs */
- {
/*
* We really have absolutely no work. Send out a fish
* (there may be some out there already), and wait for
* we're hoping to see. (Of course, we still have to
* respond to other types of messages.)
*/
- if (//!fishing &&
- outstandingFishes < RtsFlags.ParFlags.maxFishes ) { // &&
- // (last_fish_arrived_at+FISH_DELAY < CURRENT_TIME)) {
- /* fishing set in sendFish, processFish;
+ TIME now = msTime() /*CURRENT_TIME*/;
+ IF_PAR_DEBUG(verbose,
+ belch("-- now=%ld", now));
+ IF_PAR_DEBUG(verbose,
+ if (outstandingFishes < RtsFlags.ParFlags.maxFishes &&
+ (last_fish_arrived_at!=0 &&
+ last_fish_arrived_at+RtsFlags.ParFlags.fishDelay > now)) {
+ belch("--$$ delaying FISH until %ld (last fish %ld, delay %ld, now %ld)",
+ last_fish_arrived_at+RtsFlags.ParFlags.fishDelay,
+ last_fish_arrived_at,
+ RtsFlags.ParFlags.fishDelay, now);
+ });
+
+ if (outstandingFishes < RtsFlags.ParFlags.maxFishes &&
+ (last_fish_arrived_at==0 ||
+ (last_fish_arrived_at+RtsFlags.ParFlags.fishDelay <= now))) {
+ /* outstandingFishes is set in sendFish, processFish;
avoid flooding system with fishes via delay */
pe = choosePE();
sendFish(pe, mytid, NEW_FISH_AGE, NEW_FISH_HISTORY,
NEW_FISH_HUNGER);
+
+ // Global statistics: count no. of fishes
+ if (RtsFlags.ParFlags.ParStats.Global &&
+ RtsFlags.GcFlags.giveStats > NO_GC_STATS) {
+ globalParStats.tot_fish_mess++;
+ }
}
-
- processMessages();
+
+ receivedFinish = processMessages();
goto next_thread;
- // ReSchedule(0);
}
} else if (PacketsWaiting()) { /* Look for incoming messages */
- processMessages();
+ receivedFinish = processMessages();
}
/* Now we are sure that we have some work available */
ASSERT(run_queue_hd != END_TSO_QUEUE);
+
/* Take a thread from the run queue, if we have work */
t = POP_RUN_QUEUE(); // take_off_run_queue(END_TSO_QUEUE);
+ IF_DEBUG(sanity,checkTSO(t));
/* ToDo: write something to the log-file
if (RTSflags.ParFlags.granSimStats && !sameThread)
/* the spark pool for the current PE */
pool = &(MainRegTable.rSparks); // generalise to cap = &MainRegTable
- IF_DEBUG(scheduler, belch("--^^ %d sparks on [%#x] (hd=%x; tl=%x; base=%x, lim=%x)",
- spark_queue_len(pool),
- CURRENT_PROC,
- pool->hd, pool->tl, pool->base, pool->lim));
-
- IF_DEBUG(scheduler, belch("--== %d threads on [%#x] (hd=%x; tl=%x)",
- run_queue_len(), CURRENT_PROC,
- run_queue_hd, run_queue_tl));
+ IF_DEBUG(scheduler,
+ belch("--=^ %d threads, %d sparks on [%#x]",
+ run_queue_len(), spark_queue_len(pool), CURRENT_PROC));
+
+#if 1
+ if (0 && RtsFlags.ParFlags.ParStats.Full &&
+ t && LastTSO && t->id != LastTSO->id &&
+ LastTSO->why_blocked == NotBlocked &&
+ LastTSO->what_next != ThreadComplete) {
+ // if previously scheduled TSO not blocked we have to record the context switch
+ DumpVeryRawGranEvent(TimeOfLastYield, CURRENT_PROC, CURRENT_PROC,
+ GR_DESCHEDULE, LastTSO, (StgClosure *)NULL, 0, 0);
+ }
-#if 0
- if (t != LastTSO) {
+ if (RtsFlags.ParFlags.ParStats.Full &&
+ (emitSchedule /* forced emit */ ||
+ (t && LastTSO && t->id != LastTSO->id))) {
/*
we are running a different TSO, so write a schedule event to log file
NB: If we use fair scheduling we also have to write a deschedule
*/
DumpRawGranEvent(CURRENT_PROC, CURRENT_PROC,
GR_SCHEDULE, t, (StgClosure *)NULL, 0, 0);
-
+ emitSchedule = rtsFalse;
}
+
#endif
#else /* !GRAN && !PAR */
/* HACK 675: if the last thread didn't yield, make sure to print a
SCHEDULE event to the log file when StgRunning the next thread, even
if it is the same one as before */
- LastTSO = t; //(ret == ThreadBlocked) ? END_TSO_QUEUE : t;
+ LastTSO = t;
TimeOfLastYield = CURRENT_TIME;
#endif
switch (ret) {
case HeapOverflow:
+#if defined(GRAN)
+ IF_DEBUG(gran,
+ DumpGranEvent(GR_DESCHEDULE, t));
+ globalGranStats.tot_heapover++;
+#elif defined(PAR)
+ // IF_DEBUG(par,
+ //DumpGranEvent(GR_DESCHEDULE, t);
+ globalParStats.tot_heapover++;
+#endif
/* make all the running tasks block on a condition variable,
* maybe set context_switch and wait till they all pile in,
* then have them wait on a GC condition variable.
threadPaused(t);
#if defined(GRAN)
ASSERT(!is_on_queue(t,CurrentProc));
+#elif defined(PAR)
+ /* Currently we emit a DESCHEDULE event before GC in GUM.
+ ToDo: either add separate event to distinguish SYSTEM time from rest
+ or just nuke this DESCHEDULE (and the following SCHEDULE) */
+ if (0 && RtsFlags.ParFlags.ParStats.Full) {
+ DumpRawGranEvent(CURRENT_PROC, CURRENT_PROC,
+ GR_DESCHEDULE, t, (StgClosure *)NULL, 0, 0);
+ emitSchedule = rtsTrue;
+ }
#endif
ready_to_gc = rtsTrue;
break;
case StackOverflow:
+#if defined(GRAN)
+ IF_DEBUG(gran,
+ DumpGranEvent(GR_DESCHEDULE, t));
+ globalGranStats.tot_stackover++;
+#elif defined(PAR)
+ // IF_DEBUG(par,
+ // DumpGranEvent(GR_DESCHEDULE, t);
+ globalParStats.tot_stackover++;
+#endif
IF_DEBUG(scheduler,belch("--<< thread %ld (%p; %s) stopped, StackOverflow",
t->id, t, whatNext_strs[t->what_next]));
/* just adjust the stack for this thread, then pop it back
DumpGranEvent(GR_DESCHEDULE, t));
globalGranStats.tot_yields++;
#elif defined(PAR)
- IF_DEBUG(par,
- DumpGranEvent(GR_DESCHEDULE, t));
+ // IF_DEBUG(par,
+ // DumpGranEvent(GR_DESCHEDULE, t);
+ globalParStats.tot_yields++;
#endif
/* put the thread back on the run queue. Then, if we're ready to
* GC, check whether this is the last task to stop. If so, wake
//belch("&& Doing sanity check on all ThreadQueues (and their TSOs).");
checkThreadQsSanity(rtsTrue));
#endif
+#if defined(PAR)
+ if (RtsFlags.ParFlags.doFairScheduling) {
+ /* this does round-robin scheduling; good for concurrency */
+ APPEND_TO_RUN_QUEUE(t);
+ } else {
+ /* this does unfair scheduling; good for parallelism */
+ PUSH_ON_RUN_QUEUE(t);
+ }
+#else
+ /* this does round-robin scheduling; good for concurrency */
APPEND_TO_RUN_QUEUE(t);
+#endif
#if defined(GRAN)
/* add a ContinueThread event to actually process the thread */
new_event(CurrentProc, CurrentProc, CurrentTime[CurrentProc],
IF_GRAN_DEBUG(bq,
belch("GRAN: eventq and runnableq after adding yielded thread to queue again:");
G_EVENTQ(0);
- G_CURR_THREADQ(0))
+ G_CURR_THREADQ(0));
#endif /* GRAN */
break;
procStatus[CurrentProc] = Idle;
*/
#elif defined(PAR)
- IF_DEBUG(par,
- DumpGranEvent(GR_DESCHEDULE, t));
+ IF_DEBUG(scheduler,
+ belch("--<< thread %ld (%p; %s) stopped, blocking on node %p with BQ: ",
+ t->id, t, whatNext_strs[t->what_next], t->block_info.closure));
+ IF_PAR_DEBUG(bq,
+
+ if (t->block_info.closure!=(StgClosure*)NULL)
+ print_bq(t->block_info.closure));
/* Send a fetch (if BlockedOnGA) and dump event to log file */
blockThread(t);
- IF_DEBUG(scheduler,
- belch("--<< thread %ld (%p; %s) stopped, blocking on node %p with BQ: ",
- t->id, t, whatNext_strs[t->what_next], t->block_info.closure);
- if (t->block_info.closure!=(StgClosure*)NULL) print_bq(t->block_info.closure));
+ /* whatever we schedule next, we must log that schedule */
+ emitSchedule = rtsTrue;
#else /* !GRAN */
/* don't need to do anything. Either the thread is blocked on
#if defined(GRAN)
endThread(t, CurrentProc); // clean-up the thread
#elif defined(PAR)
+ /* For now all are advisory -- HWL */
+ //if(t->priority==AdvisoryPriority) ??
advisory_thread_count--;
- if (RtsFlags.ParFlags.ParStats.Full)
+
+# ifdef DIST
+ if(t->dist.priority==RevalPriority)
+ FinishReval(t);
+# endif
+
+ if (RtsFlags.ParFlags.ParStats.Full &&
+ !RtsFlags.ParFlags.ParStats.Suppressed)
DumpEndEvent(CURRENT_PROC, t, rtsFalse /* not mandatory */);
#endif
break;
IF_GRAN_DEBUG(bq,
fprintf(stderr, "GRAN: eventq and runnableq after Garbage collection:\n");
G_EVENTQ(0);
- G_CURR_THREADQ(0))
+ G_CURR_THREADQ(0));
#endif /* GRAN */
}
#if defined(GRAN)
*/
#endif /* GRAN */
} /* end of while(1) */
+ IF_PAR_DEBUG(verbose,
+ belch("== Leaving schedule() after having received Finish"));
}
/* ---------------------------------------------------------------------------
*/
#endif
-#if defined(GRAN) || defined(PAR)
- DumpGranEvent(GR_START,tso);
+#if defined(GRAN)
+ if (RtsFlags.GranFlags.GranSimStats.Full)
+ DumpGranEvent(GR_START,tso);
+#elif defined(PAR)
+ if (RtsFlags.ParFlags.ParStats.Full)
+ DumpGranEvent(GR_STARTQ,tso);
+ /* HACk to avoid SCHEDULE
+ LastTSO = tso; */
#endif
/* Link the new thread on the global thread list.
tso->global_link = all_threads;
all_threads = tso;
+#if defined(DIST)
+ tso->dist.priority = MandatoryPriority; //by default that is...
+#endif
+
#if defined(GRAN)
tso->gran.pri = pri;
# if defined(DEBUG)
globalGranStats.threads_created_on_PE[CurrentProc]++;
globalGranStats.tot_sq_len += spark_queue_len(CurrentProc);
globalGranStats.tot_sq_probes++;
+#elif 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 thread %d @ %11.2f\n", tso->id, usertime());
+ globalParStats.tot_threads_created++;
+ }
#endif
#if defined(GRAN)
return tso;
}
+#if defined(PAR)
+/* RFP:
+ all parallel thread creation calls should fall through the following routine.
+*/
+StgTSO *
+createSparkThread(rtsSpark spark)
+{ StgTSO *tso;
+ ASSERT(spark != (rtsSpark)NULL);
+ if (advisory_thread_count >= RtsFlags.ParFlags.maxThreads)
+ { threadsIgnored++;
+ barf("{createSparkThread}Daq ghuH: refusing to create another thread; no more than %d threads allowed (currently %d)",
+ RtsFlags.ParFlags.maxThreads, advisory_thread_count);
+ return END_TSO_QUEUE;
+ }
+ else
+ { threadsCreated++;
+ tso = createThread_(RtsFlags.GcFlags.initialStkSize, rtsTrue);
+ if (tso==END_TSO_QUEUE)
+ barf("createSparkThread: Cannot create TSO");
+#if defined(DIST)
+ tso->priority = AdvisoryPriority;
+#endif
+ pushClosure(tso,spark);
+ PUSH_ON_RUN_QUEUE(tso);
+ advisory_thread_count++;
+ }
+ return tso;
+}
+#endif
+
/*
Turn a spark into a thread.
ToDo: fix for SMP (needs to acquire SCHED_MUTEX!)
activateSpark (rtsSpark spark)
{
StgTSO *tso;
-
- ASSERT(spark != (rtsSpark)NULL);
- tso = createThread_(RtsFlags.GcFlags.initialStkSize, rtsTrue);
- if (tso!=END_TSO_QUEUE) {
- pushClosure(tso,spark);
- PUSH_ON_RUN_QUEUE(tso);
- advisory_thread_count++;
- if (RtsFlags.ParFlags.ParStats.Full) {
- //ASSERT(run_queue_hd == END_TSO_QUEUE); // I think ...
- IF_PAR_DEBUG(verbose,
- belch("==^^ activateSpark: turning spark of closure %p (%s) into a thread",
- (StgClosure *)spark, info_type((StgClosure *)spark)));
- }
- } else {
- barf("activateSpark: Cannot create TSO");
+ tso = createSparkThread(spark);
+ if (RtsFlags.ParFlags.ParStats.Full) {
+ //ASSERT(run_queue_hd == END_TSO_QUEUE); // I think ...
+ IF_PAR_DEBUG(verbose,
+ belch("==^^ activateSpark: turning spark of closure %p (%s) into a thread",
+ (StgClosure *)spark, info_type((StgClosure *)spark)));
}
// ToDo: fwd info on local/global spark to thread -- HWL
// tso->gran.exported = spark->exported;
* ------------------------------------------------------------------------ */
#if defined(PAR) || defined(SMP)
-void *
-taskStart( void *arg STG_UNUSED )
+void
+taskStart(void) /* ( void *arg STG_UNUSED) */
{
- rts_evalNothing(NULL);
+ scheduleThread(END_TSO_QUEUE);
}
#endif
m->link = main_threads;
main_threads = m;
- IF_DEBUG(scheduler, fprintf(stderr, "scheduler: new main thread (%d)\n",
+ IF_DEBUG(scheduler, fprintf(stderr, "== scheduler: new main thread (%d)\n",
m->tso->id));
#ifdef SMP
pthread_cond_destroy(&m->wakeup);
#endif
- IF_DEBUG(scheduler, fprintf(stderr, "scheduler: main thread (%d) finished\n",
+ IF_DEBUG(scheduler, fprintf(stderr, "== scheduler: main thread (%d) finished\n",
m->tso->id));
free(m);
new_tso_size = round_to_mblocks(new_tso_size); /* Be MBLOCK-friendly */
new_stack_size = new_tso_size - TSO_STRUCT_SIZEW;
- IF_DEBUG(scheduler, fprintf(stderr,"scheduler: increasing stack size from %d words to %d.\n", tso->stack_size, new_stack_size));
+ IF_DEBUG(scheduler, fprintf(stderr,"== scheduler: increasing stack size from %d words to %d.\n", tso->stack_size, new_stack_size));
dest = (StgTSO *)allocate(new_tso_size);
TICK_ALLOC_TSO(new_tso_size-sizeofW(StgTSO),0);
update blocked and fetch time (depending on type of the orig closure) */
if (RtsFlags.ParFlags.ParStats.Full) {
DumpRawGranEvent(CURRENT_PROC, CURRENT_PROC,
- GR_RESUME, ((StgTSO *)bqe), ((StgTSO *)bqe)->block_info.closure,
+ GR_RESUMEQ, ((StgTSO *)bqe), ((StgTSO *)bqe)->block_info.closure,
0, 0 /* spark_queue_len(ADVISORY_POOL) */);
+ if (EMPTY_RUN_QUEUE())
+ emitSchedule = rtsTrue;
switch (get_itbl(node)->type) {
case FETCH_ME_BQ:
case BLACKHOLE_BQ:
((StgTSO *)bqe)->par.blocktime += CURRENT_TIME-((StgTSO *)bqe)->par.blockedat;
break;
+#ifdef DIST
+ case MVAR:
+ break;
+#endif
default:
barf("{unblockOneLocked}Daq Qagh: unexpected closure in blocking queue");
}
case BLOCKED_FETCH:
/* if it's a BLOCKED_FETCH put it on the PendingFetches list */
next = bqe->link;
- bqe->link = PendingFetches;
- PendingFetches = bqe;
+ bqe->link = (StgBlockingQueueElement *)PendingFetches;
+ PendingFetches = (StgBlockedFetch *)bqe;
break;
# if defined(DEBUG)
(StgClosure *)bqe);
# endif
}
- // IF_DEBUG(scheduler,sched_belch("waking up thread %ld", tso->id));
+ IF_PAR_DEBUG(bq, fprintf(stderr, ", %p (%s)", bqe, info_type((StgClosure*)bqe)));
return next;
}
nat len = 0;
IF_GRAN_DEBUG(bq,
- belch("## AwBQ for node %p on PE %d @ %ld by TSO %d (%p): ", \
+ belch("##-_ AwBQ for node %p on PE %d @ %ld by TSO %d (%p): ", \
node, CurrentProc, CurrentTime[CurrentProc],
CurrentTSO->id, CurrentTSO));
node_loc = where_is(node);
- ASSERT(get_itbl(q)->type == TSO || // q is either a TSO or an RBHSave
+ ASSERT(q == END_BQ_QUEUE ||
+ get_itbl(q)->type == TSO || // q is either a TSO or an RBHSave
get_itbl(q)->type == CONSTR); // closure (type constructor)
ASSERT(is_unique(node));
void
awakenBlockedQueue(StgBlockingQueueElement *q, StgClosure *node)
{
- StgBlockingQueueElement *bqe, *next;
+ StgBlockingQueueElement *bqe;
ACQUIRE_LOCK(&sched_mutex);
IF_PAR_DEBUG(verbose,
- belch("## AwBQ for node %p on [%x]: ",
+ belch("##-_ AwBQ for node %p on [%x]: ",
node, mytid));
-
- ASSERT(get_itbl(q)->type == TSO ||
+#ifdef DIST
+ //RFP
+ if(get_itbl(q)->type == CONSTR || q==END_BQ_QUEUE) {
+ IF_PAR_DEBUG(verbose, belch("## ... nothing to unblock so lets just return. RFP (BUG?)"));
+ return;
+ }
+#endif
+
+ ASSERT(q == END_BQ_QUEUE ||
+ get_itbl(q)->type == TSO ||
get_itbl(q)->type == BLOCKED_FETCH ||
get_itbl(q)->type == CONSTR);
case BlockedOnRead:
case BlockedOnWrite:
{
+ /* take TSO off blocked_queue */
StgBlockingQueueElement *prev = NULL;
for (t = (StgBlockingQueueElement *)blocked_queue_hd; t != END_BQ_QUEUE;
prev = t, t = t->link) {
case BlockedOnDelay:
{
+ /* take TSO off sleeping_queue */
StgBlockingQueueElement *prev = NULL;
for (t = (StgBlockingQueueElement *)sleeping_queue; t != END_BQ_QUEUE;
prev = t, t = t->link) {
{
StgTSO *t;
+# if defined(GRAN)
+ char time_string[TIME_STR_LEN], node_str[NODE_STR_LEN];
+ ullong_format_string(TIME_ON_PROC(CurrentProc),
+ time_string, rtsFalse/*no commas!*/);
+
+ sched_belch("all threads at [%s]:", time_string);
+# elif defined(PAR)
+ char time_string[TIME_STR_LEN], node_str[NODE_STR_LEN];
+ ullong_format_string(CURRENT_TIME,
+ time_string, rtsFalse/*no commas!*/);
+
+ sched_belch("all threads at [%s]:", time_string);
+# else
sched_belch("all threads:");
+# endif
+
for (t = all_threads; t != END_TSO_QUEUE; t = t->global_link) {
fprintf(stderr, "\tthread %d ", t->id);
printThreadStatus(t);
/* should cover all closures that may have a blocking queue */
ASSERT(get_itbl(node)->type == BLACKHOLE_BQ ||
get_itbl(node)->type == FETCH_ME_BQ ||
- get_itbl(node)->type == RBH);
+ get_itbl(node)->type == RBH ||
+ get_itbl(node)->type == MVAR);
ASSERT(node!=(StgClosure*)NULL); // sanity check
+
+ print_bqe(((StgBlockingQueue*)node)->blocking_queue);
+}
+
+/*
+ Print a whole blocking queue starting with the element bqe.
+*/
+void
+print_bqe (StgBlockingQueueElement *bqe)
+{
+ rtsBool end;
+
/*
NB: In a parallel setup a BQ of an RBH must end with an RBH_Save closure;
*/
- for (bqe = ((StgBlockingQueue*)node)->blocking_queue, end = (bqe==END_BQ_QUEUE);
+ for (end = (bqe==END_BQ_QUEUE);
!end; // iterate until bqe points to a CONSTR
- end = (get_itbl(bqe)->type == CONSTR) || (bqe->link==END_BQ_QUEUE), bqe = end ? END_BQ_QUEUE : bqe->link) {
- ASSERT(bqe != END_BQ_QUEUE); // sanity check
- ASSERT(bqe != (StgTSO*)NULL); // sanity check
+ end = (get_itbl(bqe)->type == CONSTR) || (bqe->link==END_BQ_QUEUE),
+ bqe = end ? END_BQ_QUEUE : bqe->link) {
+ ASSERT(bqe != END_BQ_QUEUE); // sanity check
+ ASSERT(bqe != (StgBlockingQueueElement *)NULL); // sanity check
/* types of closures that may appear in a blocking queue */
ASSERT(get_itbl(bqe)->type == TSO ||
get_itbl(bqe)->type == BLOCKED_FETCH ||
get_itbl(bqe)->type == CONSTR);
/* only BQs of an RBH end with an RBH_Save closure */
- ASSERT(get_itbl(bqe)->type != CONSTR || get_itbl(node)->type == RBH);
+ //ASSERT(get_itbl(bqe)->type != CONSTR || get_itbl(node)->type == RBH);
switch (get_itbl(bqe)->type) {
case TSO:
- fprintf(stderr," TSO %d (%x),",
+ fprintf(stderr," TSO %u (%x),",
((StgTSO *)bqe)->id, ((StgTSO *)bqe));
break;
case BLOCKED_FETCH:
"RBH_Save_?"), get_itbl(bqe));
break;
default:
- barf("Unexpected closure type %s in blocking queue of %p (%s)",
- info_type(bqe), node, info_type(node));
+ barf("Unexpected closure type %s in blocking queue", // of %p (%s)",
+ info_type((StgClosure *)bqe)); // , node, info_type(node));
break;
}
} /* for */
va_start(ap,s);
#ifdef SMP
fprintf(stderr, "scheduler (task %ld): ", pthread_self());
+#elif defined(PAR)
+ fprintf(stderr, "== ");
#else
fprintf(stderr, "scheduler: ");
#endif
projects / ghc-hetmet.git / blobdiff