X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2FPapi.c;h=d95e26c8e7d09cdcaaea262a5ac77af9ef12bf47;hb=66579ff945831c5fc9a17c58c722ff01f2268d76;hp=5b4f7852db948d1fb4785101706486e0b283c376;hpb=2b522adea22f77a1c03230f5c9865c00bedb5a5b;p=ghc-hetmet.git

diff --git a/rts/Papi.c b/rts/Papi.c
index 5b4f785..d95e26c 100644
--- a/rts/Papi.c
+++ b/rts/Papi.c
@@ -1,64 +1,67 @@
+/* -----------------------------------------------------------------------------
+ * (c) The GHC Team 2006
+ * 
+ * Initialization and use of the PAPI performance monitoring library
+ *
+ *
+ * For adding events or add your processor counters modify
+ *
+ *   init_countable_events
+ *   papi_report
+ *
+ * ---------------------------------------------------------------------------*/
+
+
 #ifdef USE_PAPI /* ugly */
 
+#include <papi.h>
+
 #include "Papi.h"
 #include "Rts.h"
 #include "RtsUtils.h"
 #include "Stats.h"
 #include "RtsFlags.h"
+#include "OSThreads.h"
 
-
-/* These constants specify which events to keep track of.
- * Probably it is better to count one set of events at a time.
- * The reason is that processors have limited counters and
- * multiplexing is not enabled (yet).
- */
-#define PAPI_COUNT_BRANCHES 0
-/* The one below is Opteron specific.
- */
-#define PAPI_COUNT_STALLS 0
-#define PAPI_COUNT_DCACHE1_MISSES 1
-#define PAPI_COUNT_DCACHE2_MISSES 0
+// used to protect the aggregated counters
+#ifdef THREADED_RTS
+static Mutex papi_counter_mutex;
+#endif
 
 struct _papi_events {
   int event_code;
-  char * event_name;
+  const char * event_name;
 };
 
-#define PAPI_ADD_EVENT(EVENT) \
-    {			      \
-	ASSERT(n_papi_events<MAX_PAPI_EVENTS);	   \
-	papi_events[n_papi_events].event_code = EVENT;	\
-	papi_events[n_papi_events].event_name = #EVENT; \
-	n_papi_events++;				\
-    }
-
-/* Beware, these counters are Opteron specific */
+/* Beware, these counters are Opteron specific
+ * I obtained the numbers using the papi_avail
+ * and papi_native_avail utilities.
+ * This is certainly not the official PAPI way
+ * of doing things.
+ */
 #define FR_BR 0x40000040
 #define FR_BR_MIS 0x40000041
 #define FR_BR_MISCOMPARE 0x40000048
 #define DC_ACCESS 0x40000019
 #define DC_MISS 0x4000001a
+#define FR_DISPATCH_STALLS 0x40000054
 #define FR_DISPATCH_STALLS_BR 0x40000055
+#define FR_DISPATCH_STALLS_FULL_REORDER 0x40000058
+#define FR_DISPATCH_STALLS_FULL_RESERVATION 0x40000059
 #define FR_DISPATCH_STALLS_FULL_LS 0x4000005b
-
-/* Report the value of a counter */
-#define PAPI_REPORT(EVENTSET,EVENT) \
-  { \
-    ullong_format_string(papi_counter(EVENTSET,EVENT),temp,rtsTrue/*commas*/); \
-    statsPrintf("  (" #EVENT ")  : %s\n",temp);				\
-  }
-
-/* Report the value of a counter as a percentage of another counter */
-#define PAPI_REPORT_PCT(EVENTSET,EVENT,EVENTTOT) \
-  statsPrintf("  (" #EVENT ") %% of (" #EVENTTOT ") : %.1f%%\n", \
-	      papi_counter(EVENTSET,EVENT)*100.0/papi_counter(EVENTSET,EVENTTOT))
-
-/* Number of counted events, computed from size of papi_events */
-#define N_PAPI_EVENTS n_papi_events
+#define DC_L2_REFILL_MOES 0x40001e1b
+#define DC_SYS_REFILL_MOES 0x40001e1c
 
 /* This is bad, it should be in a header */
 #define BIG_STRING_LEN 512
 
+
+#define PAPI_CHECK(CALL) \
+  if((papi_error=(CALL)) != PAPI_OK) { \
+   debugBelch("PAPI function failed in module %s at line %d with error code %d\n", \
+	      __FILE__,__LINE__,papi_error);				\
+  }
+
 /* While PAPI reporting is going on this flag is on */
 int papi_is_reporting;
 
@@ -72,150 +75,305 @@ int papi_error;
 /* Arbitrary, to avoid using malloc */
 #define MAX_PAPI_EVENTS 10
 
-int n_papi_events = 0;
+static nat n_papi_events = 0;
 
-/* If you want to add events to count, extend the
- * papi_events array and the papi_report function.
- */
 
 /* Events counted during GC and Mutator execution */
 /* There's a trailing comma, do all C compilers accept that? */
 static struct _papi_events papi_events[MAX_PAPI_EVENTS];
+long_long MutatorCounters[MAX_PAPI_EVENTS];
+long_long GC0Counters[MAX_PAPI_EVENTS];
+long_long GC1Counters[MAX_PAPI_EVENTS];
+
+long_long start_mutator_cycles;
+long_long mutator_cycles;
+long_long start_gc_cycles;
+long_long gc0_cycles;
+long_long gc1_cycles;
+
+
+
+static long_long papi_counter(long_long values[],int event);
+static void papi_add_events(int EventSet);
+
+static nat max_hardware_counters = 2;
+
+/* If you want to add events to count, extend the
+ * init_countable_events and the papi_report function.
+ * Be aware that your processor can count a limited number
+ * of events simultaneously, you can turn on multiplexing
+ * to increase that number, though.
+ */
+static void papi_add_event(const char *name, int code)
+{
+    if (n_papi_events >= max_hardware_counters) {
+        errorBelch("too many PAPI events for this CPU (max: %d)", 
+                   max_hardware_counters);
+        stg_exit(EXIT_FAILURE);
+    }
+    papi_events[n_papi_events].event_code = code;
+    papi_events[n_papi_events].event_name = name;
+    n_papi_events++;
+}    
 
 static void
 init_countable_events(void) 
 {
-    PAPI_ADD_EVENT(PAPI_TOT_CYC);
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_BRANCH) {
+    max_hardware_counters = PAPI_num_counters();
+
+#define PAPI_ADD_EVENT(EVENT) papi_add_event(#EVENT,EVENT)
+
+    if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_BRANCH) {
 	PAPI_ADD_EVENT(FR_BR);
 	PAPI_ADD_EVENT(FR_BR_MIS);
 	/* Docs are wrong? Opteron does not count indirect branch misses exclusively */
 	PAPI_ADD_EVENT(FR_BR_MISCOMPARE);
-    }
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_STALLS) {
+    } else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_STALLS) {
+	PAPI_ADD_EVENT(FR_DISPATCH_STALLS);
 	PAPI_ADD_EVENT(FR_DISPATCH_STALLS_BR);
 	PAPI_ADD_EVENT(FR_DISPATCH_STALLS_FULL_LS);
-    }
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L1) {
+    } else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L1) {
 	PAPI_ADD_EVENT(PAPI_L1_DCA);
 	PAPI_ADD_EVENT(PAPI_L1_DCM);
-    }
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L2) {
+    } else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L2) {
 	PAPI_ADD_EVENT(PAPI_L2_DCA);
 	PAPI_ADD_EVENT(PAPI_L2_DCM);
+    } else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_CB_EVENTS) {
+	PAPI_ADD_EVENT(DC_L2_REFILL_MOES);
+	PAPI_ADD_EVENT(DC_SYS_REFILL_MOES);
+	PAPI_ADD_EVENT(FR_BR_MIS);
+    } else if (RtsFlags.PapiFlags.eventType==PAPI_USER_EVENTS) {
+        nat i;
+        char *name;
+        int code;
+        for (i = 0; i < RtsFlags.PapiFlags.numUserEvents; i++) {
+            name = RtsFlags.PapiFlags.userEvents[i];
+            PAPI_CHECK(PAPI_event_name_to_code(name, &code))
+            papi_add_event(name, code);
+        }
+    } else {
+	// PAPI_ADD_EVENT(PAPI_L1_DCA); // L1 data cache accesses
+	// PAPI_ADD_EVENT(PAPI_L1_ICR); // L1 instruction cache reads
+	// PAPI_ADD_EVENT(PAPI_L1_ICM); // L1 instruction cache misses
+	// PAPI_ADD_EVENT(PAPI_L1_STM); // L1 store misses
+	// PAPI_ADD_EVENT(PAPI_L1_DCM); // L1 data cache misses
+	// PAPI_ADD_EVENT(PAPI_L1_LDM); // L1 load misses
+	// PAPI_ADD_EVENT(PAPI_L2_TCM); // L2 cache misses
+	// PAPI_ADD_EVENT(PAPI_L2_STM); // L2 store misses
+	// PAPI_ADD_EVENT(PAPI_L2_DCW); // L2 data cache writes
+	// PAPI_ADD_EVENT(PAPI_L2_DCR); // L2 data cache reads
+	// PAPI_ADD_EVENT(PAPI_L2_TCW); // L2 cache writes
+	// PAPI_ADD_EVENT(PAPI_L2_TCR); // L2 cache reads
+	// PAPI_ADD_EVENT(PAPI_CA_CLN); // exclusive access to clean cache line
+	// PAPI_ADD_EVENT(PAPI_TLB_DM); // TLB misses
+        PAPI_ADD_EVENT(PAPI_TOT_INS); // Total instructions
+        PAPI_ADD_EVENT(PAPI_TOT_CYC); // Total instructions
+	// PAPI_ADD_EVENT(PAPI_CA_SHR); // exclusive access to shared cache line
+	// PAPI_ADD_EVENT(PAPI_RES_STL); // Cycles stalled on any resource
+        
     }
-};
 
-long_long MutatorCounters[MAX_PAPI_EVENTS];
-long_long GCCounters[MAX_PAPI_EVENTS];
+    // We might also consider:
+    //  PAPI_BR_MSP     Conditional branch instructions mispredicted
+    //  PAPI_RES_STL    Cycles stalled on any resource
+};
 
 
-/* Extract the value corresponding to an event */
-long_long
-papi_counter(long_long values[],int event)
+static void
+papi_report_event(const char *name,  ullong value)
 {
-  int i;
-  for(i=0;i<N_PAPI_EVENTS;i++) {
-    if(papi_events[i].event_code==event) {
-      return values[i];
-    }
-  }
-  /* Passed a wrong event? */
-  debugBelch("Event %d is not part of event set\n",event);
-  return 0;
+    static char temp[BIG_STRING_LEN];
+    ullong_format_string(value,temp,rtsTrue/*commas*/); 
+    statsPrintf("  %15s  %15s\n", name, temp);
 }
 
 /* This function reports counters for GC and mutator */
-void
-papi_report(long_long PapiCounters[])
+static void
+papi_report(long_long counters[])
 {
-    char temp[BIG_STRING_LEN];
+    nat i;
 
-    /* I need to improve formatting aesthetics */
-    PAPI_REPORT(PapiCounters,PAPI_TOT_CYC);
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_BRANCH) {
-    PAPI_REPORT(PapiCounters,FR_BR);
-    PAPI_REPORT(PapiCounters,FR_BR_MIS);
-    PAPI_REPORT_PCT(PapiCounters,FR_BR_MIS,FR_BR);
-    PAPI_REPORT_PCT(PapiCounters,FR_BR_MISCOMPARE,FR_BR);
-    }
+/* Report the value of a counter as a percentage of another counter */
+#define PAPI_REPORT_PCT(EVENTSET,EVENT,EVENTTOT) \
+    statsPrintf("   " #EVENT " %% of " #EVENTTOT " : %.1f%%\n",      \
+         papi_counter(EVENTSET,EVENT)*100.0/papi_counter(EVENTSET,EVENTTOT))
 
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_STALLS) {
-    PAPI_REPORT(PapiCounters,FR_DISPATCH_STALLS_BR);
-    PAPI_REPORT_PCT(PapiCounters,FR_DISPATCH_STALLS_BR,PAPI_TOT_CYC);
-    PAPI_REPORT(PapiCounters,FR_DISPATCH_STALLS_FULL_LS);
-    PAPI_REPORT_PCT(PapiCounters,FR_DISPATCH_STALLS_FULL_LS,PAPI_TOT_CYC);
+    for (i = 0; i < n_papi_events; i++)
+    {
+        papi_report_event(papi_events[i].event_name, counters[i]);
     }
 
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L1) {
-    PAPI_REPORT(PapiCounters,PAPI_L1_DCA);
-    PAPI_REPORT(PapiCounters,PAPI_L1_DCM);
-    PAPI_REPORT_PCT(PapiCounters,PAPI_L1_DCM,PAPI_L1_DCA);
+    if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_BRANCH) {
+	PAPI_REPORT_PCT(counters,FR_BR_MIS,FR_BR);
+	PAPI_REPORT_PCT(counters,FR_BR_MISCOMPARE,FR_BR);
     }
 
-    if(RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L2) {
-    PAPI_REPORT(PapiCounters,PAPI_L2_DCA);
-    PAPI_REPORT(PapiCounters,PAPI_L2_DCM);
-    PAPI_REPORT_PCT(PapiCounters,PAPI_L2_DCM,PAPI_L2_DCA);
+    else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L1) {
+	PAPI_REPORT_PCT(counters,PAPI_L1_DCM,PAPI_L1_DCA);
     }
 
+    else if (RtsFlags.PapiFlags.eventType==PAPI_FLAG_CACHE_L2) {
+	PAPI_REPORT_PCT(counters,PAPI_L2_DCM,PAPI_L2_DCA);
+    }
 }
 
-/* Add the events of papi_events into an event set */
 void
-papi_add_events(int EventSet)
+papi_stats_report (void)
 {
-  int i;
-  for(i=0;i<N_PAPI_EVENTS;i++) {
-    if((papi_error=PAPI_add_event(EventSet,
-				  papi_events[i].event_code))
-       != PAPI_OK)
-      debugBelch("Failed adding %s to event set with error code %d\n",
-		 papi_events[i].event_name,papi_error);
-  }
+    statsPrintf("  Mutator CPU counters\n");
+    papi_report_event("CYCLES", mutator_cycles);
+    papi_report(MutatorCounters);
+    
+    statsPrintf("\n  GC(0) CPU counters\n");
+    papi_report_event("CYCLES", gc0_cycles);
+    papi_report(GC0Counters);
+
+    statsPrintf("\n  GC(1) CPU counters\n");
+    papi_report_event("CYCLES", gc1_cycles);
+    papi_report(GC1Counters);
+}
+    
+void
+papi_init_eventset (int *event_set)
+{
+    PAPI_register_thread();
+    PAPI_CHECK( PAPI_create_eventset(event_set));
+    papi_add_events(*event_set);
 }
 
 void
-papi_init_eventsets(void)
+papi_init (void)
 {
+    /* Initialise the performance tracking library */
+    int ver;
+    if ((ver = PAPI_library_init(PAPI_VER_CURRENT)) != PAPI_VER_CURRENT) {
+        if (ver > 0) {
+            errorBelch("PAPI_library_init: wrong version: %x", ver);
+            stg_exit(EXIT_FAILURE);
+        } else {
+            sysErrorBelch("PAPI_library_init");
+            stg_exit(EXIT_FAILURE);
+        }
+    }
+
+#ifdef THREADED_RTS
+    {
+        int err;
+        if ((err = PAPI_thread_init(osThreadId)) < 0) {
+            barf("PAPI_thread_init: %d",err);
+        }
+
+        initMutex(&papi_counter_mutex);
+    }
+#endif
 
     init_countable_events();
 
-    /* One event set for the mutator and another for the GC */
-    PAPI_CHECK( PAPI_create_eventset(&MutatorEvents));
-    PAPI_CHECK( PAPI_create_eventset(&GCEvents));
+    papi_init_eventset(&MutatorEvents);
+    papi_init_eventset(&GCEvents);
+}
 
-    /* Both sets contain the same events */
-    papi_add_events(MutatorEvents);
-    papi_add_events(GCEvents);
+/* Extract the value corresponding to an event */
+static long_long
+papi_counter(long_long values[],int event)
+{
+  nat i;
+  for(i=0;i<n_papi_events;i++) {
+    if(papi_events[i].event_code==event) {
+      return values[i];
+    }
+  }
+  /* Passed a wrong event? */
+  debugBelch("Event %d is not part of event set\n",event);
+  return 0;
+}
 
+/* Add the events of papi_events into an event set */
+static void
+papi_add_events(int EventSet)
+{
+  nat i;
+  for(i=0;i<n_papi_events;i++) {
+    if((papi_error=PAPI_add_event(EventSet,
+				  papi_events[i].event_code))
+       != PAPI_OK)
+      debugBelch("Failed adding %s to event set with error code %d\n",
+		 papi_events[i].event_name,papi_error);
+  }
 }
 
+/* We should be using elapsed cycles
+ * to be consistent with time metric chosen in Stats.c (Elapsed time).
+ * This is an approximation to the cycles that the program spends.
+ * Note that the counters, in contrast, are virtual and user space.
+ */
+#define PAPI_cycles PAPI_get_virt_cyc
+
 void
 papi_start_mutator_count(void)
 {
+    ACQUIRE_LOCK(&papi_counter_mutex);
     PAPI_CHECK( PAPI_start(MutatorEvents));
+    start_mutator_cycles = PAPI_cycles();
+    RELEASE_LOCK(&papi_counter_mutex);
 }
 
 void
 papi_stop_mutator_count(void)
 {
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    mutator_cycles += PAPI_cycles() - start_mutator_cycles;
     PAPI_CHECK( PAPI_accum(MutatorEvents,MutatorCounters));
     PAPI_CHECK( PAPI_stop(MutatorEvents,NULL));
+    RELEASE_LOCK(&papi_counter_mutex);
 }
 
 void
 papi_start_gc_count(void)
 {
-      PAPI_CHECK( PAPI_start(GCEvents));
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    PAPI_CHECK( PAPI_start(GCEvents));
+    start_gc_cycles = PAPI_cycles();
+    RELEASE_LOCK(&papi_counter_mutex);
 }
 
 void
-papi_stop_gc_count(void)
+papi_stop_gc0_count(void)
 {
-      PAPI_CHECK( PAPI_accum(GCEvents,GCCounters));
-      PAPI_CHECK( PAPI_stop(GCEvents,NULL));
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    PAPI_CHECK( PAPI_accum(GCEvents,GC0Counters));
+    PAPI_CHECK( PAPI_stop(GCEvents,NULL));
+    gc0_cycles += PAPI_cycles() - start_gc_cycles;
+    RELEASE_LOCK(&papi_counter_mutex);
 }
 
 
+void
+papi_stop_gc1_count(void)
+{
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    PAPI_CHECK( PAPI_accum(GCEvents,GC1Counters));
+    PAPI_CHECK( PAPI_stop(GCEvents,NULL));
+    gc1_cycles += PAPI_cycles() - start_gc_cycles;
+    RELEASE_LOCK(&papi_counter_mutex);
+}
+
+
+void
+papi_thread_start_gc1_count(int event_set)
+{
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    PAPI_CHECK( PAPI_start(event_set));
+    RELEASE_LOCK(&papi_counter_mutex);
+}
+
+void
+papi_thread_stop_gc1_count(int event_set)
+{
+    ACQUIRE_LOCK(&papi_counter_mutex);
+    PAPI_CHECK( PAPI_accum(event_set,GC1Counters));
+    PAPI_CHECK( PAPI_stop(event_set,NULL));
+    RELEASE_LOCK(&papi_counter_mutex);
+}
+
 #endif /* USE_PAPI */