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c2294c1496
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>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* (C) 2016 SUSE Software Solutions GmbH
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* Thomas Renninger <trenn@suse.de>
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*/
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#ifndef __CPUPOWER_RAPL_H__
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#define __CPUPOWER_RAPL_H__
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#define PATH_TO_POWERCAP "/sys/devices/virtual/powercap"
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#define PATH_TO_RAPL "/sys/devices/virtual/powercap/intel-rapl"
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#define PATH_TO_RAPL_CLASS "/sys/devices/virtual/powercap/intel-rapl"
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#define POWERCAP_MAX_CHILD_ZONES 10
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#define POWERCAP_MAX_TREE_DEPTH 10
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#define MAX_LINE_LEN 4096
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#define SYSFS_PATH_MAX 255
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#include <stdint.h>
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struct powercap_zone {
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char name[MAX_LINE_LEN];
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/*
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* sys_name relative to PATH_TO_POWERCAP,
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* do not forget the / in between
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*/
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char sys_name[SYSFS_PATH_MAX];
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int tree_depth;
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struct powercap_zone *parent;
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struct powercap_zone *children[POWERCAP_MAX_CHILD_ZONES];
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/* More possible caps or attributes to be added? */
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uint32_t has_power_uw:1,
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has_energy_uj:1;
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};
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int powercap_walk_zones(struct powercap_zone *zone,
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int (*f)(struct powercap_zone *zone));
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struct powercap_zone *powercap_init_zones(void);
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int powercap_get_enabled(int *mode);
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int powercap_set_enabled(int mode);
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int powercap_get_driver(char *driver, int buflen);
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int powercap_get_max_energy_range_uj(struct powercap_zone *zone, uint64_t *val);
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int powercap_get_energy_uj(struct powercap_zone *zone, uint64_t *val);
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int powercap_get_max_power_range_uw(struct powercap_zone *zone, uint64_t *val);
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int powercap_get_power_uw(struct powercap_zone *zone, uint64_t *val);
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int powercap_zone_get_enabled(struct powercap_zone *zone, int *mode);
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int powercap_zone_set_enabled(struct powercap_zone *zone, int mode);
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#endif /* __CPUPOWER_RAPL_H__ */
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