Index: lib/libpmc/pmc.h
===================================================================
--- lib/libpmc/pmc.h
+++ lib/libpmc/pmc.h
@@ -37,14 +37,15 @@
  * Driver statistics.
  */
 struct pmc_driverstats {
-	int	pm_intr_ignored;	/* #interrupts ignored */
-	int	pm_intr_processed;	/* #interrupts processed */
-	int	pm_intr_bufferfull;	/* #interrupts with ENOSPC */
-	int	pm_syscalls;		/* #syscalls */
-	int	pm_syscall_errors;	/* #syscalls with errors */
-	int	pm_buffer_requests;	/* #buffer requests */
-	int	pm_buffer_requests_failed; /* #failed buffer requests */
-	int	pm_log_sweeps;		/* #sample buffer processing passes */
+	unsigned int	pm_intr_ignored;	/* #interrupts ignored */
+	unsigned int	pm_intr_processed;	/* #interrupts processed */
+	unsigned int	pm_intr_bufferfull;	/* #interrupts with ENOSPC */
+	unsigned int	pm_syscalls;		/* #syscalls */
+	unsigned int	pm_syscall_errors;	/* #syscalls with errors */
+	unsigned int	pm_buffer_requests;	/* #buffer requests */
+	unsigned int	pm_buffer_requests_failed; /* #failed buffer requests */
+	unsigned int	pm_log_sweeps;		/* #sample buffer processing
+						   passes */
 };
 
 /*
Index: sys/sys/pmc.h
===================================================================
--- sys/sys/pmc.h
+++ sys/sys/pmc.h
@@ -550,14 +550,15 @@
  */
 
 struct pmc_op_getdriverstats {
-	int	pm_intr_ignored;	/* #interrupts ignored */
-	int	pm_intr_processed;	/* #interrupts processed */
-	int	pm_intr_bufferfull;	/* #interrupts with ENOSPC */
-	int	pm_syscalls;		/* #syscalls */
-	int	pm_syscall_errors;	/* #syscalls with errors */
-	int	pm_buffer_requests;	/* #buffer requests */
-	int	pm_buffer_requests_failed; /* #failed buffer requests */
-	int	pm_log_sweeps;		/* #sample buffer processing passes */
+	unsigned int	pm_intr_ignored;	/* #interrupts ignored */
+	unsigned int	pm_intr_processed;	/* #interrupts processed */
+	unsigned int	pm_intr_bufferfull;	/* #interrupts with ENOSPC */
+	unsigned int	pm_syscalls;		/* #syscalls */
+	unsigned int	pm_syscall_errors;	/* #syscalls with errors */
+	unsigned int	pm_buffer_requests;	/* #buffer requests */
+	unsigned int	pm_buffer_requests_failed; /* #failed buffer requests */
+	unsigned int	pm_log_sweeps;		/* #sample buffer processing
+						   passes */
 };
 
 /*
Index: usr.sbin/pmcstat/pmcstat.c
===================================================================
--- usr.sbin/pmcstat/pmcstat.c
+++ usr.sbin/pmcstat/pmcstat.c
@@ -1500,14 +1500,24 @@
 			    "ERROR: Cannot retrieve driver statistics");
 		if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
 		    args.pa_verbosity > 0)
-			warnx("WARNING: some samples were dropped.\n"
-"Please consider tuning the \"kern.hwpmc.nsamples\" tunable."
+			warnx(
+"WARNING: sampling was paused at least %u time%s.\n"
+"Please consider tuning the \"kern.hwpmc.nsamples\" tunable.",
+			    ds_end.pm_intr_bufferfull -
+			    ds_start.pm_intr_bufferfull,
+			    ((ds_end.pm_intr_bufferfull -
+			    ds_start.pm_intr_bufferfull) != 1) ? "s" : ""
 			    );
 		if (ds_start.pm_buffer_requests_failed !=
 		    ds_end.pm_buffer_requests_failed &&
 		    args.pa_verbosity > 0)
-			warnx("WARNING: some events were discarded.\n"
-"Please consider tuning the \"kern.hwpmc.nbuffers\" tunable."
+			warnx(
+"WARNING: at least %u event%s were discarded while running.\n"
+"Please consider tuning the \"kern.hwpmc.nbuffers\" tunable.",
+	 		    ds_end.pm_buffer_requests_failed -
+			    ds_start.pm_buffer_requests_failed,
+			    ((ds_end.pm_buffer_requests_failed -
+			    ds_start.pm_buffer_requests_failed) != 1) ? "s" : ""
 			    );
 	}