add the powertop 1.x cpufreq tunable

5 files changed, 218 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index a503903..17e808b 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,7 @@ OBJS += parameters/parameters.o parameters/learn.o parameters/persistent.o
 OBJS += calibrate/calibrate.o
 
 OBJS += tuning/tuning.o tuning/tunable.o tuning/sysfs.o tuning/usb.o tuning/runtime.o tuning/bluetooth.o
+OBJS += tuning/cpufreq.o
 
 #
 # ncurses-devel and pciutils-devel 
diff --git a/tuning/bluetooth.cpp b/tuning/bluetooth.cpp
index c6cf756..7abf5d5 100644
--- a/tuning/bluetooth.cpp
+++ b/tuning/bluetooth.cpp
@@ -45,7 +45,7 @@
 
 bt_tunable::bt_tunable(void) : tunable("", 1.0, "Good", "Bad", "Unknown")
 {
-	sprintf(desc, "Bluetooth device active");
+	sprintf(desc, "Bluetooth device interface status");
 }
 
 
diff --git a/tuning/cpufreq.cpp b/tuning/cpufreq.cpp
new file mode 100644
index 0000000..ef6f9ec
--- /dev/null
+++ b/tuning/cpufreq.cpp
@@ -0,0 +1,165 @@
+/*
+ * Copyright 2010, Intel Corporation
+ *
+ * This file is part of PowerTOP
+ *
+ * This program file 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; version 2 of the License.
+ *
+ * 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 in a file named COPYING; if not, write to the
+ * Free Software Foundation, Inc,
+ * 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ * or just google for it.
+ *
+ * Authors:
+ *	Arjan van de Ven <arjan@linux.intel.com>
+ */
+
+#include "tuning.h"
+#include "tunable.h"
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <utility>
+#include <iostream>
+#include <fstream>
+#include <unistd.h> 
+#include <dirent.h>
+#include <errno.h>
+
+#include "../lib.h"
+#include "cpufreq.h"
+
+cpufreq_tunable::cpufreq_tunable(void) : tunable("", 0.3, "Good", "Bad", "Unknown")
+{
+	string str;
+	sprintf(desc, "Using 'ondemand' cpufreq governor");
+
+	str = read_sysfs_string("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor");
+	strcpy(original, str.c_str());
+	if (strlen(original) < 1)
+		strcpy(original, "ondemand");
+}
+
+
+int cpufreq_tunable::good_bad(void)
+{
+	DIR *dir;
+	struct dirent *dirent;
+	FILE *file;
+	char filename[PATH_MAX];
+	char line[1024];
+
+	char gov[1024];
+	int ret = TUNE_GOOD;
+
+
+	gov[0] = 0;
+
+
+	dir = opendir("/sys/devices/system/cpu");
+	if (!dir)
+		return ret;
+
+	while ((dirent = readdir(dir))) {
+		if (dirent->d_name[0]=='.')
+			continue;
+		sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/scaling_governor", dirent->d_name);
+		file = fopen(filename, "r");
+		if (!file)
+			continue;
+		memset(line, 0, 1024);
+		if (fgets(line, 1023,file)==NULL) {
+			fclose(file);
+			continue;
+		}
+		if (strlen(gov)==0)
+			strcpy(gov, line);
+		else
+			/* if the governors are inconsistent, warn */
+			if (strcmp(gov, line))
+				ret = TUNE_BAD;
+		fclose(file);
+	}
+
+	closedir(dir);
+
+	/* if the governor is set to userspace, also warn */
+	if (strstr(gov, "userspace"))
+		ret = TUNE_BAD;
+
+	/* if the governor is set to performance, also warn */
+	/* FIXME: check if this is fair on all cpus */
+	if (strstr(gov, "performance"))
+		ret = TUNE_BAD;
+
+	return ret;
+}
+
+void cpufreq_tunable::toggle(void)
+{
+	DIR *dir;
+	struct dirent *dirent;
+	FILE *file;
+	char filename[PATH_MAX];
+	int good;
+	good = good_bad();
+
+	system("/sbin/modprobe cpufreq_ondemand > /dev/null 2>&1");
+
+	if (good == TUNE_GOOD) {
+		dir = opendir("/sys/devices/system/cpu");
+		if (!dir)
+			return;
+
+		while ((dirent = readdir(dir))) {
+			if (dirent->d_name[0]=='.')
+				continue;
+			sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/scaling_governor", dirent->d_name);
+			file = fopen(filename, "w");
+			if (!file)
+				continue;
+			fprintf(file, "%s\n", original);
+			fclose(file);
+		}
+
+		closedir(dir);
+		return;
+	}
+	dir = opendir("/sys/devices/system/cpu");
+	if (!dir)
+		return;
+
+	while ((dirent = readdir(dir))) {
+		if (dirent->d_name[0]=='.')
+			continue;
+		sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/scaling_governor", dirent->d_name);
+		file = fopen(filename, "w");
+		if (!file)
+			continue;
+		fprintf(file, "ondemand\n");
+		fclose(file);
+	}
+
+	closedir(dir);
+}
+
+
+
+void add_cpufreq_tunable(void)
+{
+	class cpufreq_tunable *cf;
+
+	cf = new class cpufreq_tunable();
+	all_tunables.push_back(cf);
+}
+
diff --git a/tuning/cpufreq.h b/tuning/cpufreq.h
new file mode 100644
index 0000000..55af71f
--- /dev/null
+++ b/tuning/cpufreq.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2010, Intel Corporation
+ *
+ * This file is part of PowerTOP
+ *
+ * This program file 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; version 2 of the License.
+ *
+ * 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 in a file named COPYING; if not, write to the
+ * Free Software Foundation, Inc,
+ * 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ * or just google for it.
+ *
+ * Authors:
+ *	Arjan van de Ven <arjan@linux.intel.com>
+ */
+#ifndef _INCLUDE_GUARD_CPUFREQ_TUNE_H
+#define _INCLUDE_GUARD_CPUFREQ_TUNE_H
+
+#include <vector>
+
+#include "tunable.h"
+
+using namespace std;
+
+class cpufreq_tunable : public tunable {
+	char original[4096];
+public:
+	cpufreq_tunable(void);
+
+	virtual int good_bad(void);
+
+	virtual void toggle(void);
+
+};
+
+extern void add_cpufreq_tunable(void);
+
+
+#endif
diff --git a/tuning/tuning.cpp b/tuning/tuning.cpp
index 7318d65..3eb1fbe 100644
--- a/tuning/tuning.cpp
+++ b/tuning/tuning.cpp
@@ -35,6 +35,7 @@
 #include "usb.h"
 #include "runtime.h"
 #include "bluetooth.h"
+#include "cpufreq.h"
 #include "../display.h"
 #include "../html.h"
 
@@ -60,6 +61,8 @@ void initialize_tuning(void)
 	add_usb_tunables();
 	add_runtime_tunables("pci");
 	add_bt_tunable();
+	add_cpufreq_tunable();
+
 
 
 	sort_tunables();