[cmdline] Add "profstat" command to display profiling statistics

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/usr/profstat.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdio.h>
+#include <ipxe/profile.h>
+#include <usr/profstat.h>
+
+/** @file
+ *
+ * Profiling
+ *
+ */
+
+/**
+ * Print profiling statistics
+ *
+ */
+void profstat ( void ) {
+	struct profiler *profiler;
+
+	for_each_table_entry ( profiler, PROFILERS ) {
+		printf ( "%s: %ld +/- %ld ticks (%d samples)\n",
+			 profiler->name, profile_mean ( profiler ),
+			 profile_stddev ( profiler ), profiler->count );
+	}
+}