diff --git a/cmd/stat/common/statcommon.h b/cmd/stat/common/statcommon.h
index 9ee077431ddb..fd3e9d2d9ba7 100644
--- a/cmd/stat/common/statcommon.h
+++ b/cmd/stat/common/statcommon.h
@@ -20,7 +20,10 @@
  */
 /*
  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
- *
+ * Copyright (c) 2012 by Delphix. All rights reserved.
+ */
+
+/*
  * Common routines for acquiring snapshots of kstats for
  * iostat, mpstat, and vmstat.
  */
@@ -221,6 +224,7 @@ struct snapshot {
 	size_t s_iodevs_is_name_maxlen;
 	struct sys_snapshot s_sys;
 	struct biostats s_biostats;
+	size_t s_nr_active_cpus;
 };
 
 /* print a message and exit with failure */
diff --git a/uts/common/dtrace/dtrace.c b/uts/common/dtrace/dtrace.c
index 7a5e67ea7065..4bee43839fd0 100644
--- a/uts/common/dtrace/dtrace.c
+++ b/uts/common/dtrace/dtrace.c
@@ -5861,7 +5861,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 	size_t size;
 	int vtime, onintr;
 	volatile uint16_t *flags;
-	hrtime_t now;
+	hrtime_t now, end;
 
 	/*
 	 * Kick out immediately if this CPU is still being born (in which case
@@ -5876,6 +5876,8 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 	cpuid = CPU->cpu_id;
 	onintr = CPU_ON_INTR(CPU);
 
+	CPU->cpu_dtrace_probes++;
+
 	if (!onintr && probe->dtpr_predcache != DTRACE_CACHEIDNONE &&
 	    probe->dtpr_predcache == curthread->t_predcache) {
 		/*
@@ -6455,8 +6457,11 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 			buf->dtb_offset = offs + ecb->dte_size;
 	}
 
+	end = dtrace_gethrtime();
 	if (vtime)
-		curthread->t_dtrace_start = dtrace_gethrtime();
+		curthread->t_dtrace_start = end;
+
+	CPU->cpu_dtrace_nsec += end - now;
 
 	dtrace_interrupt_enable(cookie);
 }
diff --git a/uts/common/sys/cpuvar.h b/uts/common/sys/cpuvar.h
index d4075d580be7..6c07bcbc8a8c 100644
--- a/uts/common/sys/cpuvar.h
+++ b/uts/common/sys/cpuvar.h
@@ -21,6 +21,7 @@
 
 /*
  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
 #ifndef _SYS_CPUVAR_H
@@ -187,6 +188,9 @@ typedef struct cpu {
 	uintptr_t	cpu_dtrace_caller;	/* DTrace: caller, if any */
 	hrtime_t	cpu_dtrace_chillmark;	/* DTrace: chill mark time */
 	hrtime_t	cpu_dtrace_chilled;	/* DTrace: total chill time */
+	uint64_t	cpu_dtrace_probes;	/* DTrace: total probes fired */
+	hrtime_t	cpu_dtrace_nsec;	/* DTrace: ns in dtrace_probe */
+
 	volatile uint16_t cpu_mstate;		/* cpu microstate */
 	volatile uint16_t cpu_mstate_gen;	/* generation counter */
 	volatile hrtime_t cpu_mstate_start;	/* cpu microstate start time */