cpupower: Introduce powercap intel-rapl library and powercap-info command
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>
This commit is contained in:
Thomas Renninger
Shuah Khan
parent
4680b734e7
commit
c2294c1496
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@ -133,7 +133,7 @@ UTIL_OBJS = utils/helpers/amd.o utils/helpers/msr.o \
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utils/idle_monitor/mperf_monitor.o utils/idle_monitor/cpupower-monitor.o \
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utils/cpupower.o utils/cpufreq-info.o utils/cpufreq-set.o \
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utils/cpupower-set.o utils/cpupower-info.o utils/cpuidle-info.o \
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utils/cpuidle-set.o
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utils/cpuidle-set.o utils/powercap-info.o
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UTIL_SRC := $(UTIL_OBJS:.o=.c)
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@ -143,9 +143,12 @@ UTIL_HEADERS = utils/helpers/helpers.h utils/idle_monitor/cpupower-monitor.h \
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utils/helpers/bitmask.h \
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utils/idle_monitor/idle_monitors.h utils/idle_monitor/idle_monitors.def
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LIB_HEADERS = lib/cpufreq.h lib/cpupower.h lib/cpuidle.h lib/acpi_cppc.h
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LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c lib/acpi_cppc.c
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LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o lib/acpi_cppc.o
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LIB_HEADERS = lib/cpufreq.h lib/cpupower.h lib/cpuidle.h lib/acpi_cppc.h \
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lib/powercap.h
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LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c lib/acpi_cppc.c \
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lib/powercap.c
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LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o lib/acpi_cppc.o \
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lib/powercap.o
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LIB_OBJS := $(addprefix $(OUTPUT),$(LIB_OBJS))
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override CFLAGS += -pipe
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@ -276,6 +279,7 @@ install-lib: libcpupower
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$(INSTALL) -d $(DESTDIR)${includedir}
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$(INSTALL_DATA) lib/cpufreq.h $(DESTDIR)${includedir}/cpufreq.h
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$(INSTALL_DATA) lib/cpuidle.h $(DESTDIR)${includedir}/cpuidle.h
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$(INSTALL_DATA) lib/powercap.h $(DESTDIR)${includedir}/powercap.h
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install-tools: $(OUTPUT)cpupower
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$(INSTALL) -d $(DESTDIR)${bindir}
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@ -292,6 +296,7 @@ install-man:
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$(INSTALL_DATA) -D man/cpupower-set.1 $(DESTDIR)${mandir}/man1/cpupower-set.1
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$(INSTALL_DATA) -D man/cpupower-info.1 $(DESTDIR)${mandir}/man1/cpupower-info.1
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$(INSTALL_DATA) -D man/cpupower-monitor.1 $(DESTDIR)${mandir}/man1/cpupower-monitor.1
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$(INSTALL_DATA) -D man/cpupower-powercap-info.1 $(DESTDIR)${mandir}/man1/cpupower-powercap-info.1
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install-gmo: create-gmo
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$(INSTALL) -d $(DESTDIR)${localedir}
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@ -321,6 +326,7 @@ uninstall:
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- rm -f $(DESTDIR)${mandir}/man1/cpupower-set.1
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- rm -f $(DESTDIR)${mandir}/man1/cpupower-info.1
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- rm -f $(DESTDIR)${mandir}/man1/cpupower-monitor.1
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- rm -f $(DESTDIR)${mandir}/man1/cpupower-powercap-info.1
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- for HLANG in $(LANGUAGES); do \
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rm -f $(DESTDIR)${localedir}/$$HLANG/LC_MESSAGES/cpupower.mo; \
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done;
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@ -0,0 +1,290 @@
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// 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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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <dirent.h>
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#include "powercap.h"
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static unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen)
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{
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int fd;
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ssize_t numread;
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return 0;
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numread = read(fd, buf, buflen - 1);
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if (numread < 1) {
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close(fd);
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return 0;
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}
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buf[numread] = '\0';
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close(fd);
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return (unsigned int) numread;
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}
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static int sysfs_get_enabled(char *path, int *mode)
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{
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int fd;
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char yes_no;
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*mode = 0;
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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if (read(fd, &yes_no, 1) != 1) {
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close(fd);
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return -1;
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}
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if (yes_no == '1') {
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*mode = 1;
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return 0;
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} else if (yes_no == '0') {
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return 0;
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}
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return -1;
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}
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int powercap_get_enabled(int *mode)
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{
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char path[SYSFS_PATH_MAX] = PATH_TO_POWERCAP "/intel-rapl/enabled";
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return sysfs_get_enabled(path, mode);
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}
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/*
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* Hardcoded, because rapl is the only powercap implementation
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- * this needs to get more generic if more powercap implementations
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* should show up
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*/
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int powercap_get_driver(char *driver, int buflen)
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{
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char file[SYSFS_PATH_MAX] = PATH_TO_RAPL;
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struct stat statbuf;
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if (stat(file, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) {
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driver = "";
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return -1;
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} else if (buflen > 10) {
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strcpy(driver, "intel-rapl");
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return 0;
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} else
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return -1;
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}
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enum powercap_get64 {
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GET_ENERGY_UJ,
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GET_MAX_ENERGY_RANGE_UJ,
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GET_POWER_UW,
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GET_MAX_POWER_RANGE_UW,
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MAX_GET_64_FILES
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};
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static const char *powercap_get64_files[MAX_GET_64_FILES] = {
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[GET_POWER_UW] = "power_uw",
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[GET_MAX_POWER_RANGE_UW] = "max_power_range_uw",
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[GET_ENERGY_UJ] = "energy_uj",
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[GET_MAX_ENERGY_RANGE_UJ] = "max_energy_range_uj",
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};
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static int sysfs_powercap_get64_val(struct powercap_zone *zone,
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enum powercap_get64 which,
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uint64_t *val)
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{
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char file[SYSFS_PATH_MAX] = PATH_TO_POWERCAP "/";
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int ret;
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char buf[MAX_LINE_LEN];
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strcat(file, zone->sys_name);
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strcat(file, "/");
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strcat(file, powercap_get64_files[which]);
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ret = sysfs_read_file(file, buf, MAX_LINE_LEN);
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if (ret < 0)
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return ret;
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if (ret == 0)
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return -1;
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*val = strtoll(buf, NULL, 10);
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return 0;
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}
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int powercap_get_max_energy_range_uj(struct powercap_zone *zone, uint64_t *val)
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{
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return sysfs_powercap_get64_val(zone, GET_MAX_ENERGY_RANGE_UJ, val);
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}
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int powercap_get_energy_uj(struct powercap_zone *zone, uint64_t *val)
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{
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return sysfs_powercap_get64_val(zone, GET_ENERGY_UJ, val);
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}
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int powercap_get_max_power_range_uw(struct powercap_zone *zone, uint64_t *val)
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{
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return sysfs_powercap_get64_val(zone, GET_MAX_POWER_RANGE_UW, val);
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}
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int powercap_get_power_uw(struct powercap_zone *zone, uint64_t *val)
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{
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return sysfs_powercap_get64_val(zone, GET_POWER_UW, val);
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}
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int powercap_zone_get_enabled(struct powercap_zone *zone, int *mode)
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{
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char path[SYSFS_PATH_MAX] = PATH_TO_POWERCAP;
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if ((strlen(PATH_TO_POWERCAP) + strlen(zone->sys_name)) +
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strlen("/enabled") + 1 >= SYSFS_PATH_MAX)
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return -1;
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strcat(path, "/");
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strcat(path, zone->sys_name);
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strcat(path, "/enabled");
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return sysfs_get_enabled(path, mode);
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}
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int powercap_zone_set_enabled(struct powercap_zone *zone, int mode)
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{
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/* To be done if needed */
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return 0;
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}
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int powercap_read_zone(struct powercap_zone *zone)
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{
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struct dirent *dent;
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DIR *zone_dir;
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char sysfs_dir[SYSFS_PATH_MAX] = PATH_TO_POWERCAP;
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struct powercap_zone *child_zone;
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char file[SYSFS_PATH_MAX] = PATH_TO_POWERCAP;
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int i, ret = 0;
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uint64_t val = 0;
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strcat(sysfs_dir, "/");
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strcat(sysfs_dir, zone->sys_name);
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zone_dir = opendir(sysfs_dir);
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if (zone_dir == NULL)
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return -1;
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strcat(file, "/");
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strcat(file, zone->sys_name);
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strcat(file, "/name");
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sysfs_read_file(file, zone->name, MAX_LINE_LEN);
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if (zone->parent)
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zone->tree_depth = zone->parent->tree_depth + 1;
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ret = powercap_get_energy_uj(zone, &val);
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if (ret == 0)
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zone->has_energy_uj = 1;
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ret = powercap_get_power_uw(zone, &val);
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if (ret == 0)
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zone->has_power_uw = 1;
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while ((dent = readdir(zone_dir)) != NULL) {
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struct stat st;
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if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
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continue;
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if (stat(dent->d_name, &st) != 0 || !S_ISDIR(st.st_mode))
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if (fstatat(dirfd(zone_dir), dent->d_name, &st, 0) < 0)
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continue;
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if (strncmp(dent->d_name, "intel-rapl:", 11) != 0)
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continue;
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child_zone = calloc(1, sizeof(struct powercap_zone));
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if (child_zone == NULL)
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return -1;
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for (i = 0; i < POWERCAP_MAX_CHILD_ZONES; i++) {
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if (zone->children[i] == NULL) {
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zone->children[i] = child_zone;
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break;
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}
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if (i == POWERCAP_MAX_CHILD_ZONES - 1) {
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free(child_zone);
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fprintf(stderr, "Reached POWERCAP_MAX_CHILD_ZONES %d\n",
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POWERCAP_MAX_CHILD_ZONES);
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return -1;
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}
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}
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strcpy(child_zone->sys_name, zone->sys_name);
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strcat(child_zone->sys_name, "/");
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strcat(child_zone->sys_name, dent->d_name);
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child_zone->parent = zone;
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if (zone->tree_depth >= POWERCAP_MAX_TREE_DEPTH) {
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fprintf(stderr, "Maximum zone hierarchy depth[%d] reached\n",
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POWERCAP_MAX_TREE_DEPTH);
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ret = -1;
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break;
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}
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powercap_read_zone(child_zone);
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}
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closedir(zone_dir);
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return ret;
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}
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struct powercap_zone *powercap_init_zones(void)
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{
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int enabled;
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struct powercap_zone *root_zone;
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int ret;
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char file[SYSFS_PATH_MAX] = PATH_TO_RAPL "/enabled";
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ret = sysfs_get_enabled(file, &enabled);
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if (ret)
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return NULL;
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if (!enabled)
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return NULL;
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root_zone = calloc(1, sizeof(struct powercap_zone));
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if (!root_zone)
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return NULL;
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strcpy(root_zone->sys_name, "intel-rapl/intel-rapl:0");
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powercap_read_zone(root_zone);
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return root_zone;
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}
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/* Call function *f on the passed zone and all its children */
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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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{
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int i, ret;
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if (!zone)
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return -1;
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ret = f(zone);
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if (ret)
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return ret;
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for (i = 0; i < POWERCAP_MAX_CHILD_ZONES; i++) {
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if (zone->children[i] != NULL)
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powercap_walk_zones(zone->children[i], f);
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}
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return 0;
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}
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@ -0,0 +1,54 @@
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/* 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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@ -0,0 +1,25 @@
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.TH CPUPOWER\-POWERCAP\-INFO "1" "05/08/2016" "" "cpupower Manual"
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.SH NAME
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cpupower\-powercap\-info \- Shows powercapping related kernel and hardware configurations
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.SH SYNOPSIS
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.ft B
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.B cpupower powercap-info
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.SH DESCRIPTION
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\fBcpupower powercap-info \fP shows kernel powercapping subsystem information.
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This needs hardware support and a loaded powercapping driver (at this time only
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intel_rapl driver exits) exporting hardware values userspace via sysfs.
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Some options are platform wide, some affect single cores. By default values
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of core zero are displayed only. cpupower --cpu all cpuinfo will show the
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settings of all cores, see cpupower(1) how to choose specific cores.
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.SH "DOCUMENTATION"
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kernel sources:
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Documentation/power/powercap/powercap.txt
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|
||||
.SH "SEE ALSO"
|
||||
|
||||
cpupower(1)
|
||||
|
|
@ -8,6 +8,8 @@ extern int cmd_freq_set(int argc, const char **argv);
|
|||
extern int cmd_freq_info(int argc, const char **argv);
|
||||
extern int cmd_idle_set(int argc, const char **argv);
|
||||
extern int cmd_idle_info(int argc, const char **argv);
|
||||
extern int cmd_cap_info(int argc, const char **argv);
|
||||
extern int cmd_cap_set(int argc, const char **argv);
|
||||
extern int cmd_monitor(int argc, const char **argv);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -54,6 +54,7 @@ static struct cmd_struct commands[] = {
|
|||
{ "frequency-set", cmd_freq_set, 1 },
|
||||
{ "idle-info", cmd_idle_info, 0 },
|
||||
{ "idle-set", cmd_idle_set, 1 },
|
||||
{ "powercap-info", cmd_cap_info, 0 },
|
||||
{ "set", cmd_set, 1 },
|
||||
{ "info", cmd_info, 0 },
|
||||
{ "monitor", cmd_monitor, 0 },
|
||||
|
|
|
|||
|
|
@ -0,0 +1,117 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* (C) 2016 SUSE Software Solutions GmbH
|
||||
* Thomas Renninger <trenn@suse.de>
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <getopt.h>
|
||||
|
||||
#include "powercap.h"
|
||||
#include "helpers/helpers.h"
|
||||
|
||||
int powercap_show_all;
|
||||
|
||||
static struct option info_opts[] = {
|
||||
{ "all", no_argument, NULL, 'a'},
|
||||
{ },
|
||||
};
|
||||
|
||||
static int powercap_print_one_zone(struct powercap_zone *zone)
|
||||
{
|
||||
int mode, i, ret = 0;
|
||||
char pr_prefix[1024] = "";
|
||||
|
||||
for (i = 0; i < zone->tree_depth && i < POWERCAP_MAX_TREE_DEPTH; i++)
|
||||
strcat(pr_prefix, "\t");
|
||||
|
||||
printf("%sZone: %s", pr_prefix, zone->name);
|
||||
ret = powercap_zone_get_enabled(zone, &mode);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
printf(" (%s)\n", mode ? "enabled" : "disabled");
|
||||
|
||||
if (zone->has_power_uw)
|
||||
printf(_("%sPower can be monitored in micro Jules\n"),
|
||||
pr_prefix);
|
||||
|
||||
if (zone->has_energy_uj)
|
||||
printf(_("%sPower can be monitored in micro Watts\n"),
|
||||
pr_prefix);
|
||||
|
||||
printf("\n");
|
||||
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int powercap_show(void)
|
||||
{
|
||||
struct powercap_zone *root_zone;
|
||||
char line[MAX_LINE_LEN] = "";
|
||||
int ret, val;
|
||||
|
||||
ret = powercap_get_driver(line, MAX_LINE_LEN);
|
||||
if (ret < 0) {
|
||||
printf(_("No powercapping driver loaded\n"));
|
||||
return ret;
|
||||
}
|
||||
|
||||
printf("Driver: %s\n", line);
|
||||
ret = powercap_get_enabled(&val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (!val) {
|
||||
printf(_("Powercapping is disabled\n"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
printf(_("Powercap domain hierarchy:\n\n"));
|
||||
root_zone = powercap_init_zones();
|
||||
|
||||
if (root_zone == NULL) {
|
||||
printf(_("No powercap info found\n"));
|
||||
return 1;
|
||||
}
|
||||
|
||||
powercap_walk_zones(root_zone, powercap_print_one_zone);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int cmd_cap_set(int argc, char **argv)
|
||||
{
|
||||
return 0;
|
||||
};
|
||||
int cmd_cap_info(int argc, char **argv)
|
||||
{
|
||||
int ret = 0, cont = 1;
|
||||
|
||||
do {
|
||||
ret = getopt_long(argc, argv, "a", info_opts, NULL);
|
||||
switch (ret) {
|
||||
case '?':
|
||||
cont = 0;
|
||||
break;
|
||||
case -1:
|
||||
cont = 0;
|
||||
break;
|
||||
case 'a':
|
||||
powercap_show_all = 1;
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, _("invalid or unknown argument\n"));
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
} while (cont);
|
||||
|
||||
powercap_show();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue