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authorThomas Renninger <trenn@suse.com>2016-04-28 15:24:40 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-04-28 16:02:29 +0200
commitac5a181d065d74fb6b213d538f743392f27bcdbd (patch)
treece5eab193a80e4514c1ebe931c391af57741a99d /tools/power/cpupower/lib/cpupower_intern.h
parentcpupowerutils: bench: trivial fix of spelling mistake on "average" (diff)
downloadlinux-dev-ac5a181d065d74fb6b213d538f743392f27bcdbd.tar.xz
linux-dev-ac5a181d065d74fb6b213d538f743392f27bcdbd.zip
cpupower: Add cpuidle parts into library
This more or less is a renaming and moving of functions and should not introduce any functional change. cpupower was built from cpufrequtils (which had a C library providing easy access to cpu frequency platform info). In the meantime it got enhanced by quite some neat cpuidle userspace tools. Now the cpu idle functions have been separated and added to the cpupower.so library. So beside an already existing public header file: cpufreq.h cpupower now also exports these cpu idle functions in: cpuidle.h Here again pasted for better review of the interfaces: ====================================== int cpuidle_is_state_disabled(unsigned int cpu, unsigned int idlestate); int cpuidle_state_disable(unsigned int cpu, unsigned int idlestate, unsigned int disable); unsigned long cpuidle_state_latency(unsigned int cpu, unsigned int idlestate); unsigned long cpuidle_state_usage(unsigned int cpu, unsigned int idlestate); unsigned long long cpuidle_state_time(unsigned int cpu, unsigned int idlestate); char *cpuidle_state_name(unsigned int cpu, unsigned int idlestate); char *cpuidle_state_desc(unsigned int cpu, unsigned int idlestate); unsigned int cpuidle_state_count(unsigned int cpu); char *cpuidle_get_governor(void); char *cpuidle_get_driver(void); ====================================== Signed-off-by: Thomas Renninger <trenn@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power/cpupower/lib/cpupower_intern.h')
-rw-r--r--tools/power/cpupower/lib/cpupower_intern.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/power/cpupower/lib/cpupower_intern.h b/tools/power/cpupower/lib/cpupower_intern.h
new file mode 100644
index 000000000000..f8ec4009621c
--- /dev/null
+++ b/tools/power/cpupower/lib/cpupower_intern.h
@@ -0,0 +1,5 @@
+#define PATH_TO_CPU "/sys/devices/system/cpu/"
+#define MAX_LINE_LEN 4096
+#define SYSFS_PATH_MAX 255
+
+unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen);