forked from pool/cpupower
605 lines
16 KiB
Diff
605 lines
16 KiB
Diff
cpupower: Introduce powercap intel-rapl library helpers and powercap-info command
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Read out powercap zone information via:
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cpupower powercap-info
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and show the zone hierarchy to the user:
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./cpupower powercap-info
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Driver: intel-rapl
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Powercap domain hierarchy:
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Zone: package-0 (enabled)
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Power consumption can be monitored in micro Watts
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Zone: core (disabled)
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Power consumption can be monitored in micro Watts
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Zone: uncore (disabled)
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Power consumption can be monitored in micro Watts
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Zone: dram (disabled)
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Power consumption can be monitored in micro Watts
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There is a dummy -a option for powercap-info which can/should be used to show
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more detailed info later. Like that other args can be added easily later as well.
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Signed-off-by: Thomas Renninger <trenn@suse.com>
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Index: cpupower-5.1/Makefile
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===================================================================
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--- cpupower-5.1.orig/Makefile 2019-05-06 02:42:58.000000000 +0200
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+++ cpupower-5.1/Makefile 2019-07-18 12:14:08.787390727 +0200
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@@ -143,7 +143,7 @@ UTIL_OBJS = utils/helpers/amd.o utils/h
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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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@@ -153,9 +153,9 @@ UTIL_HEADERS = utils/helpers/helpers.h u
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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
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-LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c
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-LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o
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+LIB_HEADERS = lib/cpufreq.h lib/cpupower.h lib/cpuidle.h lib/powercap.h
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+LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c lib/powercap.c
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+LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o lib/powercap.o
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LIB_OBJS := $(addprefix $(OUTPUT),$(LIB_OBJS))
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override CFLAGS += -pipe
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@@ -286,6 +286,7 @@ install-lib:
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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:
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$(INSTALL) -d $(DESTDIR)${bindir}
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@@ -302,6 +303,7 @@ 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:
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$(INSTALL) -d $(DESTDIR)${localedir}
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@@ -331,6 +333,7 @@ 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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Index: cpupower-5.1/lib/powercap.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ cpupower-5.1/lib/powercap.c 2019-07-18 12:14:08.787390727 +0200
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@@ -0,0 +1,290 @@
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+/*
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+ * (C) 2016 Thomas Renninger <trenn@suse.com>
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+ *
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+ * Licensed under the terms of the GNU GPL License version 2.
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+ */
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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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+
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+#include "powercap.h"
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+
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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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+
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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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+
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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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+
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+ buf[numread] = '\0';
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+ close(fd);
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+
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+ return (unsigned int) numread;
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+}
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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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+
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+ *mode = 0;
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+
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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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+
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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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+
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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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+
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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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+/*
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ *val = strtoll(buf, NULL, 10);
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+ return 0;
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+}
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return sysfs_get_enabled(path, mode);
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+}
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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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+
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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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+
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+ strcat(sysfs_dir, "/");
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+ strcat(sysfs_dir, zone->sys_name);
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+
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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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+
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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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+
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+ while((dent = readdir(zone_dir)) != NULL) {
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+ struct stat st;
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+
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+ if(strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
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+ continue;
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+
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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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+
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+ if (strncmp(dent->d_name, "intel-rapl:", 11) != 0)
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+ continue;
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+
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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 hierachy 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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+
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+struct powercap_zone *powercap_init_zones()
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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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+
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+ ret = sysfs_get_enabled(file, &enabled);
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+
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+ if (ret)
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+ return NULL;
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+
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+ if (!enabled)
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+ return NULL;
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+
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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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+
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+ strcpy(root_zone->sys_name, "intel-rapl/intel-rapl:0");
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+
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+ powercap_read_zone(root_zone);
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+
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+ return root_zone;
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+}
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+
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+/* Call function *f on the passed zone and all its children */
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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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+{
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+ int i, ret;
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+
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+ if (!zone)
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+ return -1;
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+
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+ ret = f(zone);
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+ if (ret)
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+ return ret;
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+
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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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+ }
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+ return 0;
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+}
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Index: cpupower-5.1/lib/powercap.h
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ cpupower-5.1/lib/powercap.h 2019-07-18 12:14:08.787390727 +0200
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@@ -0,0 +1,54 @@
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+/*
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+ * (C) 2016 Thomas Renninger <trenn@suse.com>
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+ *
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+ * Licensed under the terms of the GNU GPL License version 2.
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+ */
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+
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+#ifndef __CPUPOWER_RAPL_H__
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+#define __CPUPOWER_RAPL_H__
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+
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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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+
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+#define POWERCAP_MAX_CHILD_ZONES 10
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+#define POWERCAP_MAX_TREE_DEPTH 10
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+
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+#define MAX_LINE_LEN 4096
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+#define SYSFS_PATH_MAX 255
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+
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+#include <stdint.h>
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+
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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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+};
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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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+
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+struct powercap_zone *powercap_init_zones();
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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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+
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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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+
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+
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+#endif /* __CPUPOWER_RAPL_H__ */
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Index: cpupower-5.1/utils/builtin.h
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===================================================================
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--- cpupower-5.1.orig/utils/builtin.h 2019-05-06 02:42:58.000000000 +0200
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+++ cpupower-5.1/utils/builtin.h 2019-07-18 12:14:08.787390727 +0200
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@@ -8,6 +8,8 @@ extern int cmd_freq_set(int argc, const
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extern int cmd_freq_info(int argc, const char **argv);
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extern int cmd_idle_set(int argc, const char **argv);
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extern int cmd_idle_info(int argc, const char **argv);
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+extern int cmd_cap_info(int argc, const char **argv);
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+extern int cmd_cap_set(int argc, const char **argv);
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extern int cmd_monitor(int argc, const char **argv);
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#endif
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Index: cpupower-5.1/utils/cpupower.c
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===================================================================
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--- cpupower-5.1.orig/utils/cpupower.c 2019-05-06 02:42:58.000000000 +0200
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+++ cpupower-5.1/utils/cpupower.c 2019-07-18 12:14:08.787390727 +0200
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@@ -53,6 +53,7 @@ static struct cmd_struct commands[] = {
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{ "frequency-set", cmd_freq_set, 1 },
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{ "idle-info", cmd_idle_info, 0 },
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{ "idle-set", cmd_idle_set, 1 },
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+ { "powercap-info", cmd_cap_info, 0 },
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{ "set", cmd_set, 1 },
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{ "info", cmd_info, 0 },
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{ "monitor", cmd_monitor, 0 },
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Index: cpupower-5.1/utils/powercap-info.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ cpupower-5.1/utils/powercap-info.c 2019-07-18 12:14:08.787390727 +0200
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@@ -0,0 +1,113 @@
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+#include <unistd.h>
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+#include <stdio.h>
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+#include <errno.h>
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+#include <stdlib.h>
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+#include <stdint.h>
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+#include <string.h>
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+
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+#include <getopt.h>
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+
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+#include "powercap.h"
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+#include "helpers/helpers.h"
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+
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+int powercap_show_all = 0;
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+
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+static struct option info_opts[] =
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+{
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+ { "all", no_argument, NULL, 'a'},
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+ { },
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+};
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+
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+static int powercap_print_one_zone(struct powercap_zone *zone)
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+{
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+ int mode, i, ret = 0;
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+ char pr_prefix[1024] = "";
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+
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+ for (i = 0; i < zone->tree_depth && i < POWERCAP_MAX_TREE_DEPTH; i++)
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+ strcat (pr_prefix, "\t");
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+
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+ printf("%sZone: %s", pr_prefix, zone->name);
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+ ret = powercap_zone_get_enabled(zone, &mode);
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+ if (ret < 0)
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+ return ret;
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+ printf(" (%s)\n", mode ? "enabled" : "disabled");
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+
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+ if (zone->has_power_uw)
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+printf(_("%sEnergy consumption can be monitored in micro Jules\n"),
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+ pr_prefix);
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+
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+ if (zone->has_energy_uj)
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+printf(_("%sPower consumption can be monitored in micro Watts\n"),
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+ pr_prefix);
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+
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+ printf("\n");
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+
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+ if (ret != 0)
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+ return ret;
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+ return ret;
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+}
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+
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+static int powercap_show()
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+{
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+ struct powercap_zone *root_zone;
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+ char line[MAX_LINE_LEN] = "";
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+ int ret, val;
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+
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+ ret = powercap_get_driver(line, MAX_LINE_LEN);
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+ if (ret < 0) {
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+ printf(_("No powercapping driver loaded\n"));
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+ return ret;
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+ }
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+
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+ printf("Driver: %s\n", line);
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+ ret = powercap_get_enabled(&val);
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+ if (ret < 0)
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+ return ret;
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+ if (!val) {
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+ printf(_("Powercapping is disabled\n"));
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+ return -1;
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+ }
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+
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+ printf(_("Powercap domain hierarchy:\n\n"));
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+ root_zone = powercap_init_zones();
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+
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+ if (root_zone == NULL) {
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+ printf(_("No powercap info found\n"));
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+ return 1;
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+ }
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+
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+ powercap_walk_zones(root_zone, powercap_print_one_zone);
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+
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+ return 0;
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+}
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+
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+int cmd_cap_set(int argc, char **argv)
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+{
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+ return 0;
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+};
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+int cmd_cap_info(int argc, char **argv)
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+{
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+ extern char *optarg;
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+ extern int optind, opterr, optopt;
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+ int ret = 0, cont = 1;
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+ do {
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+ ret = getopt_long(argc, argv, "a", info_opts, NULL);
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+ switch (ret) {
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+ case '?':
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+ cont = 0;
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+ break;
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+ case -1:
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+ cont = 0;
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+ break;
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+ case 'a':
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+ powercap_show_all = 1;
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+ break;
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+ default:
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+ fprintf(stderr, _("invalid or unknown argument\n"));
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+ return EXIT_FAILURE;
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+ }
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+ } while (cont);
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+
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+ powercap_show();
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+ return 0;
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+}
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Index: cpupower-5.1/man/cpupower-powercap-info.1
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ cpupower-5.1/man/cpupower-powercap-info.1 2019-07-18 12:14:08.787390727 +0200
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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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+
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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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+
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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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+
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+.SH "DOCUMENTATION"
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+
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+kernel sources:
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+Documentation/power/powercap/powercap.txt
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+
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+
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+.SH "SEE ALSO"
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+
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+cpupower(1)
|