summaryrefslogtreecommitdiffstats
path: root/kernel/tools/power/cpupower/utils/cpupower-info.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/tools/power/cpupower/utils/cpupower-info.c')
-rw-r--r--kernel/tools/power/cpupower/utils/cpupower-info.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/kernel/tools/power/cpupower/utils/cpupower-info.c b/kernel/tools/power/cpupower/utils/cpupower-info.c
new file mode 100644
index 000000000..136d979e9
--- /dev/null
+++ b/kernel/tools/power/cpupower/utils/cpupower-info.c
@@ -0,0 +1,103 @@
+/*
+ * (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ * Licensed under the terms of the GNU GPL License version 2.
+ */
+
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <getopt.h>
+
+#include <cpufreq.h>
+#include "helpers/helpers.h"
+#include "helpers/sysfs.h"
+
+static struct option set_opts[] = {
+ { .name = "perf-bias", .has_arg = optional_argument, .flag = NULL, .val = 'b'},
+ { },
+};
+
+static void print_wrong_arg_exit(void)
+{
+ printf(_("invalid or unknown argument\n"));
+ exit(EXIT_FAILURE);
+}
+
+int cmd_info(int argc, char **argv)
+{
+ extern char *optarg;
+ extern int optind, opterr, optopt;
+ unsigned int cpu;
+
+ union {
+ struct {
+ int perf_bias:1;
+ };
+ int params;
+ } params = {};
+ int ret = 0;
+
+ setlocale(LC_ALL, "");
+ textdomain(PACKAGE);
+
+ /* parameter parsing */
+ while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
+ switch (ret) {
+ case 'b':
+ if (params.perf_bias)
+ print_wrong_arg_exit();
+ params.perf_bias = 1;
+ break;
+ default:
+ print_wrong_arg_exit();
+ }
+ };
+
+ if (!params.params)
+ params.params = 0x7;
+
+ /* Default is: show output of CPU 0 only */
+ if (bitmask_isallclear(cpus_chosen))
+ bitmask_setbit(cpus_chosen, 0);
+
+ /* Add more per cpu options here */
+ if (!params.perf_bias)
+ return ret;
+
+ if (params.perf_bias) {
+ if (!run_as_root) {
+ params.perf_bias = 0;
+ printf(_("Intel's performance bias setting needs root privileges\n"));
+ } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
+ printf(_("System does not support Intel's performance"
+ " bias setting\n"));
+ params.perf_bias = 0;
+ }
+ }
+
+ /* loop over CPUs */
+ for (cpu = bitmask_first(cpus_chosen);
+ cpu <= bitmask_last(cpus_chosen); cpu++) {
+
+ if (!bitmask_isbitset(cpus_chosen, cpu) ||
+ cpufreq_cpu_exists(cpu))
+ continue;
+
+ printf(_("analyzing CPU %d:\n"), cpu);
+
+ if (params.perf_bias) {
+ ret = msr_intel_get_perf_bias(cpu);
+ if (ret < 0) {
+ fprintf(stderr,
+ _("Could not read perf-bias value[%d]\n"), ret);
+ exit(EXIT_FAILURE);
+ } else
+ printf(_("perf-bias: %d\n"), ret);
+ }
+ }
+ return 0;
+}