2 files changed, 18 insertions, 2 deletions

diff --git a/usr.sbin/pmcstat/pmcstat.8 b/usr.sbin/pmcstat/pmcstat.8
index 5555759939ad..97a2f626ca6d 100644
--- a/usr.sbin/pmcstat/pmcstat.8
+++ b/usr.sbin/pmcstat/pmcstat.8
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 19, 2008
+.Dd April 29, 2014
 .Dt PMCSTAT 8
 .Os
 .Sh NAME
@@ -46,6 +46,7 @@
 .Op Fl S Ar event-spec
 .Op Fl T
 .Op Fl W
+.Op Fl a Ar pathname
 .Op Fl c Ar cpu-spec
 .Op Fl d
 .Op Fl f Ar pluginopt
@@ -221,6 +222,21 @@ This is an experimental feature intended to help analyse the
 dynamic behaviour of processes in the system.
 It may incur substantial overhead if enabled.
 The default is for this feature to be disabled.
+.It Fl a Ar pathname
+Perform a symbol and file:line lookup for each address in each
+callgraph and save the output to
+.Ar pathname .
+Unlike
+.Fl m
+that only resolves the first symbol in the graph, this resolves
+every node in the callgraph, or prints out addresses if no
+lookup information is available.
+This option requires the
+.Fl R
+option to read in samples that were previously collected and
+saved with the 
+.Fl o
+option.
 .It Fl c Ar cpu-spec
 Set the cpus for subsequent system mode PMCs specified on the
 command line to
diff --git a/usr.sbin/pmcstat/pmcstat.c b/usr.sbin/pmcstat/pmcstat.c
index 3edba3f20db4..ae93b9387da2 100644
--- a/usr.sbin/pmcstat/pmcstat.c
+++ b/usr.sbin/pmcstat/pmcstat.c
@@ -503,7 +503,7 @@ pmcstat_show_usage(void)
 	    "\t -S spec\t allocate a system-wide sampling PMC\n"
 	    "\t -T\t\t start in top mode\n"
 	    "\t -W\t\t (toggle) show counts per context switch\n"
-	    "\t -a <file>\t print sampled PCs and callgraph to \"file\"\n"
+	    "\t -a file\t print sampled PCs and callgraph to \"file\"\n"
 	    "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n"
 	    "\t -d\t\t (toggle) track descendants\n"
 	    "\t -f spec\t pass \"spec\" to as plugin option\n"