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

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

src/config/config.c

@@ -290,6 +290,9 @@ REQUIRE_OBJECT ( console_cmd );
 #ifdef IPSTAT_CMD
 REQUIRE_OBJECT ( ipstat_cmd );
 #endif
+#ifdef PROFSTAT_CMD
+REQUIRE_OBJECT ( profstat_cmd );
+#endif
 
 /*
  * Drag in miscellaneous objects

src/config/general.h

@@ -149,6 +149,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 //#define PING_CMD		/* Ping command */
 //#define CONSOLE_CMD		/* Console command */
 //#define IPSTAT_CMD		/* IP statistics commands */
+//#define PROFSTAT_CMD		/* Profiling commands */
 
 /*
  * ROM-specific options

src/hci/commands/profstat_cmd.c

@@ -0,0 +1,70 @@
+/*
+ * 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 <getopt.h>
+#include <ipxe/command.h>
+#include <ipxe/parseopt.h>
+#include <usr/profstat.h>
+
+/** @file
+ *
+ * Profiling commands
+ *
+ */
+
+/** "profstat" options */
+struct profstat_options {};
+
+/** "profstat" option list */
+static struct option_descriptor profstat_opts[] = {};
+
+/** "profstat" command descriptor */
+static struct command_descriptor profstat_cmd =
+	COMMAND_DESC ( struct profstat_options, profstat_opts, 0, 0, NULL );
+
+/**
+ * The "profstat" command
+ *
+ * @v argc		Argument count
+ * @v argv		Argument list
+ * @ret rc		Return status code
+ */
+static int profstat_exec ( int argc, char **argv ) {
+	struct profstat_options opts;
+	int rc;
+
+	/* Parse options */
+	if ( ( rc = parse_options ( argc, argv, &profstat_cmd, &opts ) ) != 0 )
+		return rc;
+
+	profstat();
+
+	return 0;
+}
+
+/** Profiling commands */
+struct command profstat_commands[] __command = {
+	{
+		.name = "profstat",
+		.exec = profstat_exec,
+	},
+};

src/include/usr/profstat.h

@@ -0,0 +1,14 @@
+#ifndef _USR_PROFSTAT_H
+#define _USR_PROFSTAT_H
+
+/** @file
+ *
+ * Profiling
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+extern void profstat ( void );
+
+#endif /* _USR_PROFSTAT_H */

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 );
+	}
+}