kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2023-05-08	cpupower:Fix resource leaks in sysfs_get_enabled()	Hao Zeng	1	-7/+16
	The sysfs_get_enabled() opened file processor not closed, may cause a file handle leak. Putting error handling and resource cleanup code together makes the code easy to maintain and read. Removed the unnecessary else if branch from the original function, as it should return an error in cases other than '0'. Signed-off-by: Hao Zeng <zenghao@kylinos.cn> Suggested-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2022-12-01	cpupower: Introduce powercap intel-rapl library and powercap-info command	Thomas Renninger	1	-0/+290
	Read out powercap zone information via: cpupower powercap-info and show the zone hierarchy to the user: ./cpupower powercap-info Driver: intel-rapl Powercap domain hierarchy: Zone: package-0 (enabled) Power consumption can be monitored in micro Watts Zone: core (disabled) Power consumption can be monitored in micro Watts Zone: uncore (disabled) Power consumption can be monitored in micro Watts Zone: dram (disabled) Power consumption can be monitored in micro Watts There is a dummy -a option for powercap-info which can/should be used to show more detailed info later. Like that other args can be added easily later as well. A enable/disable option via powercap-set subcommand is also an enhancement for later. Also not all RAPL domains are shown. The func walking through RAPL subdomains is restricted and hardcoded to: "intel-rapl/intel-rapl:0" On my system above powercap domains map to: intel-rapl/intel-rapl:0 -> pack (age-0) intel-rapl/intel-rapl:0/intel-rapl:0:0 -> core intel-rapl/intel-rapl:0/intel-rapl:0:1 -> uncore Missing ones on my system are: intel-rapl-mmio/intel-rapl-mmio:0 -> pack (age-0) intel-rapl/intel-rapl:1 -> psys This could get enhanced in: struct powercap_zone powercap_init_zones() and adopted to walk through all intel-rapl zones, but also to other powercap drivers like dtpm (Dynamic Thermal Power Management framework), cmp with: drivers/powercap/dtpm_ Signed-off-by: Thomas Renninger <trenn@suse.de> CC: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>