tools/power turbostat: Print cpuidle information
authorLen Brown <len.brown@intel.com>
Sat, 21 Mar 2020 04:47:47 +0000 (00:47 -0400)
committerLen Brown <len.brown@intel.com>
Sat, 21 Mar 2020 04:47:47 +0000 (00:47 -0400)
Print cpuidle driver and governor.

Originally-by: Antti Laakso <antti.laakso@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
tools/power/x86/turbostat/turbostat.c

index 77f8937..05dbe23 100644 (file)
@@ -3503,6 +3503,23 @@ dump_cstate_pstate_config_info(unsigned int family, unsigned int model)
        dump_nhm_cst_cfg();
 }
 
+static void dump_sysfs_file(char *path)
+{
+       FILE *input;
+       char cpuidle_buf[64];
+
+       input = fopen(path, "r");
+       if (input == NULL) {
+               if (debug)
+                       fprintf(outf, "NSFOD %s\n", path);
+               return;
+       }
+       if (!fgets(cpuidle_buf, sizeof(cpuidle_buf), input))
+               err(1, "%s: failed to read file", path);
+       fclose(input);
+
+       fprintf(outf, "%s: %s", strrchr(path, '/') + 1, cpuidle_buf);
+}
 static void
 dump_sysfs_cstate_config(void)
 {
@@ -3516,6 +3533,15 @@ dump_sysfs_cstate_config(void)
        if (!DO_BIC(BIC_sysfs))
                return;
 
+       if (access("/sys/devices/system/cpu/cpuidle", R_OK)) {
+               fprintf(outf, "cpuidle not loaded\n");
+               return;
+       }
+
+       dump_sysfs_file("/sys/devices/system/cpu/cpuidle/current_driver");
+       dump_sysfs_file("/sys/devices/system/cpu/cpuidle/current_governor");
+       dump_sysfs_file("/sys/devices/system/cpu/cpuidle/current_governor_ro");
+
        for (state = 0; state < 10; ++state) {
 
                sprintf(path, "/sys/devices/system/cpu/cpu%d/cpuidle/state%d/name",