MFC r206090:

Improve "top" header by:
- Display sample received per PMCs (or merged PMCs).
- Display percentage vs all samples

usr.sbin/pmcstat/pmcpl_callgraph.c

@@ -341,6 +341,7 @@ pmcpl_cg_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
 	parent = pmcstat_cgnode_hash_lookup_pc(pp, pmcid, pc, usermode);
 	if (parent == NULL) {
 		pmcstat_stats.ps_callchain_dubious_frames++;
+		pmcr->pr_dubious_frames++;
 		return;
 	}
 

usr.sbin/pmcstat/pmcpl_calltree.c

@@ -403,6 +403,10 @@ pmcpl_ct_node_dumptop(int pmcin, struct pmcpl_ct_node *ct,
 	    &pmcin, pmcpl_ct_arc_compare);
 
 	for (i = 0; i < ct->pct_narc; i++) {
+		/* Skip this arc if there is no sample at all. */
+		if (PMCPL_CT_SAMPLE(pmcin,
+		    &ct->pct_arc[i].pcta_samples) == 0)
+			continue;
 		if (PMCPL_CT_SAMPLEP(pmcin,
 		    &ct->pct_arc[i].pcta_samples) > pmcstat_threshold) {
 			if (pmcpl_ct_node_dumptop(pmcin,
@@ -516,6 +520,10 @@ pmcpl_ct_topdisplay(void)
 
 		x = y = 0;
 		for (i = 0; i < pmcpl_ct_root->pct_narc; i++) {
+			/* Skip this arc if there is no sample at all. */
+			if (PMCPL_CT_SAMPLE(pmcin,
+			    &pmcpl_ct_root->pct_arc[i].pcta_samples) == 0)
+				continue;
 			if (pmcpl_ct_node_dumptop(pmcin,
 			        pmcpl_ct_root->pct_arc[i].pcta_child,
 			        &rsamples, x, &y, pmcstat_displayheight - 2)) {
@@ -693,6 +701,7 @@ pmcpl_ct_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
 	}
 	if (n-- == 0) {
 		pmcstat_stats.ps_callchain_dubious_frames++;
+		pmcr->pr_dubious_frames++;
 		return;
 	}
 

usr.sbin/pmcstat/pmcstat_log.c

@@ -247,6 +247,7 @@ static int	pmcstat_string_compute_hash(const char *_string);
 static void pmcstat_string_initialize(void);
 static int	pmcstat_string_lookup_hash(pmcstat_interned_string _is);
 static void pmcstat_string_shutdown(void);
+static void pmcstat_stats_reset(void);
 
 /*
  * A simple implementation of interned strings.  Each interned string
@@ -274,6 +275,21 @@ int pmcstat_npmcs;
  */
 int pmcstat_pause;
 
+static void
+pmcstat_stats_reset(void)
+{
+	struct pmcstat_pmcrecord *pr;
+
+	/* Flush PMCs stats. */
+	LIST_FOREACH(pr, &pmcstat_pmcs, pr_next) {
+		pr->pr_samples = 0;
+		pr->pr_dubious_frames = 0;
+	}
+
+	/* Flush global stats. */
+	bzero(&pmcstat_stats, sizeof(struct pmcstat_stats));
+}
+
 /*
  * Compute a 'hash' value for a string.
  */
@@ -1009,6 +1025,8 @@ pmcstat_pmcid_add(pmc_id_t pmcid, pmcstat_interned_string ps)
 	pr->pr_pmcid = pmcid;
 	pr->pr_pmcname = ps;
 	pr->pr_pmcin = pmcstat_npmcs++;
+	pr->pr_samples = 0;
+	pr->pr_dubious_frames = 0;
 	pr->pr_merge = prm == NULL ? pr : prm;
 
 	LIST_INSERT_HEAD(&pmcstat_pmcs, pr, pr_next);
@@ -1387,6 +1405,7 @@ pmcstat_analyze_log(void)
 			/* Get PMC record. */
 			pmcr = pmcstat_lookup_pmcid(ev.pl_u.pl_s.pl_pmcid);
 			assert(pmcr != NULL);
+			pmcr->pr_samples++;
 
 			/*
 			 * Call the plugins processing
@@ -1420,6 +1439,7 @@ pmcstat_analyze_log(void)
 			/* Get PMC record. */
 			pmcr = pmcstat_lookup_pmcid(ev.pl_u.pl_cc.pl_pmcid);
 			assert(pmcr != NULL);
+			pmcr->pr_samples++;
 
 			/*
 			 * Call the plugins processing
@@ -1787,32 +1807,46 @@ pmcstat_process_log(void)
 static void
 pmcstat_refresh_top(void)
 {
+	int v_attrs;
+	float v;
 	char pmcname[40];
-	const char *s;
+	struct pmcstat_pmcrecord *pmcpr;
 
 	/* If in pause mode do not refresh display. */
 	if (pmcstat_pause)
 		return;
 
 	/* Wait until PMC pop in the log. */
-	s = pmcstat_pmcindex_to_name(pmcstat_pmcinfilter);
-	if (s == NULL)
+	pmcpr = pmcstat_pmcindex_to_pmcr(pmcstat_pmcinfilter);
+	if (pmcpr == NULL)
 		return;
 
 	/* Format PMC name. */
 	if (pmcstat_mergepmc)
-		snprintf(pmcname, sizeof(pmcname), "[%s]", s);
+		snprintf(pmcname, sizeof(pmcname), "[%s]",
+		    pmcstat_string_unintern(pmcpr->pr_pmcname));
 	else
 		snprintf(pmcname, sizeof(pmcname), "%s.%d",
-		    s, pmcstat_pmcinfilter);
+		    pmcstat_string_unintern(pmcpr->pr_pmcname),
+		    pmcstat_pmcinfilter);
+
+	/* Format samples count. */
+	if (pmcstat_stats.ps_samples_total > 0)
+		v = (pmcpr->pr_samples * 100.0) /
+		    pmcstat_stats.ps_samples_total;
+	else
+		v = 0.;
+	v_attrs = PMCSTAT_ATTRPERCENT(v);
 
 	PMCSTAT_PRINTBEGIN();
-	PMCSTAT_PRINTW("PMC: %s Samples: %u processed, %u invalid\n\n",
+	PMCSTAT_PRINTW("PMC: %s Samples: %u ",
 	    pmcname,
-	    pmcstat_stats.ps_samples_total,
-	    pmcstat_stats.ps_samples_unknown_offset +
-	    pmcstat_stats.ps_samples_indeterminable +
-	    pmcstat_stats.ps_callchain_dubious_frames);
+	    pmcpr->pr_samples);
+	PMCSTAT_ATTRON(v_attrs);
+	PMCSTAT_PRINTW("(%.1f%%) ", v);
+	PMCSTAT_ATTROFF(v_attrs);
+	PMCSTAT_PRINTW(", %u unresolved\n\n",
+	    pmcpr->pr_dubious_frames);
 	if (plugins[args.pa_plugin].pl_topdisplay != NULL)
 		plugins[args.pa_plugin].pl_topdisplay();
 	PMCSTAT_PRINTEND();
@@ -1879,7 +1913,7 @@ pmcstat_keypress_log(void)
 		 */
 		if (plugins[args.pa_plugin].pl_shutdown != NULL)
 			plugins[args.pa_plugin].pl_shutdown(NULL);
-		bzero(&pmcstat_stats, sizeof(struct pmcstat_stats));
+		pmcstat_stats_reset();
 		if (plugins[args.pa_plugin].pl_init != NULL)
 			plugins[args.pa_plugin].pl_init();
 
@@ -1900,7 +1934,7 @@ pmcstat_keypress_log(void)
 		} while (plugins[args.pa_plugin].pl_topdisplay == NULL);
 
 		/* Open new plugin. */
-		bzero(&pmcstat_stats, sizeof(struct pmcstat_stats));
+		pmcstat_stats_reset();
 		if (plugins[args.pa_plugin].pl_init != NULL)
 			plugins[args.pa_plugin].pl_init();
 		wprintw(w, "switching to plugin %s",
@@ -1949,7 +1983,7 @@ pmcstat_display_log(void)
 	if (args.pa_topmode == PMCSTAT_TOP_DELTA) {
 		if (plugins[args.pa_plugin].pl_shutdown != NULL)
 			plugins[args.pa_plugin].pl_shutdown(NULL);
-		bzero(&pmcstat_stats, sizeof(struct pmcstat_stats));
+		pmcstat_stats_reset();
 		if (plugins[args.pa_plugin].pl_init != NULL)
 			plugins[args.pa_plugin].pl_init();
 	}

usr.sbin/pmcstat/pmcstat_log.h

@@ -146,6 +146,8 @@ struct pmcstat_pmcrecord {
 	pmc_id_t			pr_pmcid;
 	int				pr_pmcin;
 	pmcstat_interned_string		pr_pmcname;
+	int				pr_samples;
+	int				pr_dubious_frames;
 	struct pmcstat_pmcrecord	*pr_merge;
 };
 extern LIST_HEAD(pmcstat_pmcs, pmcstat_pmcrecord) pmcstat_pmcs; /* PMC list */