diff --git a/src/main.cpp b/src/main.cpp
index 0883424..16b1613 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,6 +28,7 @@
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include <iostream>
+#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
@@ -36,6 +37,7 @@
#include <getopt.h>
#include <unistd.h>
#include <locale.h>
+#include <sys/resource.h>
#include "cpu/cpu.h"
#include "process/process.h"
@@ -60,6 +62,8 @@
#define DEBUGFS_MAGIC 0x64626720
+#define NR_OPEN_DEF 1024 * 1024
+
int debug_learning = 0;
unsigned time_out = 20;
int leave_powertop = 0;
@@ -278,16 +282,35 @@ static void checkroot() {
}
+static int get_nr_open(void) {
+ int nr_open = NR_OPEN_DEF;
+ ifstream file;
+
+ file.open("/proc/sys/fs/nr_open", ios::in);
+ if (file) {
+ file >> nr_open;
+ if (!file)
+ nr_open = NR_OPEN_DEF;
+ file.close();
+ }
+ return nr_open;
+}
+
static void powertop_init(void)
{
static char initialized = 0;
int ret;
struct statfs st_fs;
+ struct rlimit rlmt;
if (initialized)
return;
checkroot();
+
+ rlmt.rlim_cur = rlmt.rlim_max = get_nr_open();
+ setrlimit (RLIMIT_NOFILE, &rlmt);
+
ret = system("/sbin/modprobe cpufreq_stats > /dev/null 2>&1");
ret = system("/sbin/modprobe msr > /dev/null 2>&1");
statfs("/sys/kernel/debug", &st_fs);