diff options
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/acpi/os_specific/service_layers/oslinuxtbl.c | 4 | ||||
| -rw-r--r-- | tools/power/acpi/tools/acpidump/apdump.c | 3 | ||||
| -rw-r--r-- | tools/power/acpi/tools/acpidump/apfiles.c | 2 | ||||
| -rw-r--r-- | tools/power/cpupower/.gitignore | 3 | ||||
| -rw-r--r-- | tools/power/cpupower/lib/cpuidle.c | 5 | ||||
| -rw-r--r-- | tools/power/cpupower/lib/cpupower.c | 2 | ||||
| -rwxr-xr-x | tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py | 2 | ||||
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 2 | ||||
| -rw-r--r-- | tools/power/x86/x86_energy_perf_policy/Makefile | 29 | ||||
| -rw-r--r-- | tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 | 15 | ||||
| -rw-r--r-- | tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c | 133 |
11 files changed, 139 insertions, 61 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c index 9741e7503591..de93067a5da3 100644 --- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c +++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c @@ -995,7 +995,7 @@ static acpi_status osl_list_customized_tables(char *directory) { void *table_dir; u32 instance; - char temp_name[ACPI_NAMESEG_SIZE]; + char temp_name[ACPI_NAMESEG_SIZE] ACPI_NONSTRING; char *filename; acpi_status status = AE_OK; @@ -1312,7 +1312,7 @@ osl_get_customized_table(char *pathname, { void *table_dir; u32 current_instance = 0; - char temp_name[ACPI_NAMESEG_SIZE]; + char temp_name[ACPI_NAMESEG_SIZE] ACPI_NONSTRING; char table_filename[PATH_MAX]; char *filename; acpi_status status; diff --git a/tools/power/acpi/tools/acpidump/apdump.c b/tools/power/acpi/tools/acpidump/apdump.c index bf30143efbdc..7a6223aa703c 100644 --- a/tools/power/acpi/tools/acpidump/apdump.c +++ b/tools/power/acpi/tools/acpidump/apdump.c @@ -86,9 +86,10 @@ u8 ap_is_valid_checksum(struct acpi_table_header *table) if (ACPI_FAILURE(status)) { fprintf(stderr, "%4.4s: Warning: wrong checksum in table\n", table->signature); + return (FALSE); } - return (AE_OK); + return (TRUE); } /****************************************************************************** diff --git a/tools/power/acpi/tools/acpidump/apfiles.c b/tools/power/acpi/tools/acpidump/apfiles.c index 75db0091e275..d6b8a201480b 100644 --- a/tools/power/acpi/tools/acpidump/apfiles.c +++ b/tools/power/acpi/tools/acpidump/apfiles.c @@ -103,7 +103,7 @@ int ap_open_output_file(char *pathname) int ap_write_to_binary_file(struct acpi_table_header *table, u32 instance) { - char filename[ACPI_NAMESEG_SIZE + 16] ACPI_NONSTRING; + char filename[ACPI_NAMESEG_SIZE + 16]; char instance_str[16]; ACPI_FILE file; acpi_size actual; diff --git a/tools/power/cpupower/.gitignore b/tools/power/cpupower/.gitignore index 5113d5a7aee0..7677329c42a6 100644 --- a/tools/power/cpupower/.gitignore +++ b/tools/power/cpupower/.gitignore @@ -27,6 +27,3 @@ debug/i386/intel_gsic debug/i386/powernow-k8-decode debug/x86_64/centrino-decode debug/x86_64/powernow-k8-decode - -# Clang's compilation database file -compile_commands.json diff --git a/tools/power/cpupower/lib/cpuidle.c b/tools/power/cpupower/lib/cpuidle.c index 0ecac009273c..f2c1139adf71 100644 --- a/tools/power/cpupower/lib/cpuidle.c +++ b/tools/power/cpupower/lib/cpuidle.c @@ -233,6 +233,7 @@ int cpuidle_state_disable(unsigned int cpu, { char value[SYSFS_PATH_MAX]; int bytes_written; + int len; if (cpuidle_state_count(cpu) <= idlestate) return -1; @@ -241,10 +242,10 @@ int cpuidle_state_disable(unsigned int cpu, idlestate_value_files[IDLESTATE_DISABLE])) return -2; - snprintf(value, SYSFS_PATH_MAX, "%u", disable); + len = snprintf(value, SYSFS_PATH_MAX, "%u", disable); bytes_written = cpuidle_state_write_file(cpu, idlestate, "disable", - value, sizeof(disable)); + value, len); if (bytes_written) return 0; return -3; diff --git a/tools/power/cpupower/lib/cpupower.c b/tools/power/cpupower/lib/cpupower.c index ce8dfb8e46ab..d7f7ec6f151c 100644 --- a/tools/power/cpupower/lib/cpupower.c +++ b/tools/power/cpupower/lib/cpupower.c @@ -56,7 +56,7 @@ unsigned int cpupower_write_sysfs(const char *path, char *buf, size_t buflen) if (numwritten < 1) { perror(path); close(fd); - return -1; + return 0; } close(fd); diff --git a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py index feb9f9421c7b..875b086550d1 100755 --- a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py +++ b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py @@ -11,7 +11,7 @@ Prerequisites: gnuplot 5.0 or higher gnuplot-py 1.8 or higher (Most of the distributions have these required packages. They may be called - gnuplot-py, phython-gnuplot or phython3-gnuplot, gnuplot-nox, ... ) + gnuplot-py, python-gnuplot or python3-gnuplot, gnuplot-nox, ... ) Kernel config for Linux trace is enabled diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 47eb2d4d13a5..f2512d78bcbd 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -1890,7 +1890,7 @@ int pmt_telemdir_sort(const struct dirent **a, const struct dirent **b) sscanf((*a)->d_name, "telem%u", &aidx); sscanf((*b)->d_name, "telem%u", &bidx); - return aidx >= bidx; + return (aidx > bidx) ? 1 : (aidx < bidx) ? -1 : 0; } const struct dirent *pmt_diriter_next(struct pmt_diriter_t *iter) diff --git a/tools/power/x86/x86_energy_perf_policy/Makefile b/tools/power/x86/x86_energy_perf_policy/Makefile index 666b325a62a2..d18284667400 100644 --- a/tools/power/x86/x86_energy_perf_policy/Makefile +++ b/tools/power/x86/x86_energy_perf_policy/Makefile @@ -1,8 +1,12 @@ # SPDX-License-Identifier: GPL-2.0 CC = $(CROSS_COMPILE)gcc -BUILD_OUTPUT := $(CURDIR) +BUILD_OUTPUT := $(CURDIR) PREFIX := /usr DESTDIR := +DAY := $(shell date +%Y.%m.%d) +SNAPSHOT = x86_energy_perf_policy-$(DAY) + + ifeq ("$(origin O)", "command line") BUILD_OUTPUT := $(O) @@ -27,3 +31,26 @@ install : x86_energy_perf_policy install -d $(DESTDIR)$(PREFIX)/share/man/man8 install -m 644 x86_energy_perf_policy.8 $(DESTDIR)$(PREFIX)/share/man/man8 +snapshot: x86_energy_perf_policy + @rm -rf $(SNAPSHOT) + @mkdir $(SNAPSHOT) + @cp x86_energy_perf_policy Makefile x86_energy_perf_policy.c x86_energy_perf_policy.8 $(SNAPSHOT) + + @sed -e 's/^#include <linux\/bits.h>/#include "bits.h"/' -e 's/u64/unsigned long long/' ../../../../arch/x86/include/asm/msr-index.h > $(SNAPSHOT)/msr-index.h + @echo '#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))' >> $(SNAPSHOT)/msr-index.h + @echo "#define BIT(x) (1 << (x))" > $(SNAPSHOT)/bits.h + @echo "#define BIT_ULL(nr) (1ULL << (nr))" >> $(SNAPSHOT)/bits.h + @echo "#define GENMASK(h, l) (((~0UL) << (l)) & (~0UL >> (sizeof(long) * 8 - 1 - (h))))" >> $(SNAPSHOT)/bits.h + @echo "#define GENMASK_ULL(h, l) (((~0ULL) << (l)) & (~0ULL >> (sizeof(long long) * 8 - 1 - (h))))" >> $(SNAPSHOT)/bits.h + + @echo '#define BUILD_BUG_ON(cond) do { enum { compile_time_check ## __COUNTER__ = 1/(!(cond)) }; } while (0)' > $(SNAPSHOT)/build_bug.h + @echo '#define __must_be_array(arr) 0' >> $(SNAPSHOT)/build_bug.h + + @echo PWD=. > $(SNAPSHOT)/Makefile + @echo "CFLAGS += -DMSRHEADER='\"msr-index.h\"'" >> $(SNAPSHOT)/Makefile + @echo "CFLAGS += -DBUILD_BUG_HEADER='\"build_bug.h\"'" >> $(SNAPSHOT)/Makefile + @sed -e's/.*MSRHEADER.*//' Makefile >> $(SNAPSHOT)/Makefile + + @rm -f $(SNAPSHOT).tar.gz + tar cvzf $(SNAPSHOT).tar.gz $(SNAPSHOT) + diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 index 78c6361898b1..0aa981c18e56 100644 --- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 +++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 @@ -2,7 +2,7 @@ .\" Distributed under the GPL, Copyleft 1994. .TH X86_ENERGY_PERF_POLICY 8 .SH NAME -x86_energy_perf_policy \- Manage Energy vs. Performance Policy via x86 Model Specific Registers +x86_energy_perf_policy \- Manage Energy vs. Performance Policy .SH SYNOPSIS .B x86_energy_perf_policy .RB "[ options ] [ scope ] [field \ value]" @@ -19,9 +19,14 @@ x86_energy_perf_policy \- Manage Energy vs. Performance Policy via x86 Model Spe .SH DESCRIPTION \fBx86_energy_perf_policy\fP displays and updates energy-performance policy settings specific to -Intel Architecture Processors. Settings are accessed via Model Specific Register (MSR) -updates, no matter if the Linux cpufreq sub-system is enabled or not. +Intel Architecture Processors. It summarizes settings available +in standard Linux interfaces (eg. cpufreq), +and also decodes underlying Model Specific Register (MSRs). +While \fBx86_energy_perf_policy\fP can manage energy-performance policy +using only MSR access, it prefers standard +Linux kernel interfaces, when they are available. +.SH BACKGROUND Policy in MSR_IA32_ENERGY_PERF_BIAS (EPB) may affect a wide range of hardware decisions, such as how aggressively the hardware enters and exits CPU idle states (C-states) @@ -200,7 +205,9 @@ runs only as root. .SH FILES .ta .nf -/dev/cpu/*/msr +EPB: /sys/devices/system/cpu/cpu*/power/energy_perf_bias +EPP: /sys/devices/system/cpu/cpu*/cpufreq/energy_performance_preference +MSR: /dev/cpu/*/msr .fi .SH "SEE ALSO" .nf diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c index ebda9c366b2b..884a4c746f32 100644 --- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c +++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c @@ -4,7 +4,7 @@ * policy preference bias on recent X86 processors. */ /* - * Copyright (c) 2010 - 2017 Intel Corporation. + * Copyright (c) 2010 - 2025 Intel Corporation. * Len Brown <len.brown@intel.com> */ @@ -62,6 +62,7 @@ unsigned char turbo_update_value; unsigned char update_hwp_epp; unsigned char update_hwp_min; unsigned char update_hwp_max; +unsigned char hwp_limits_done_via_sysfs; unsigned char update_hwp_desired; unsigned char update_hwp_window; unsigned char update_hwp_use_pkg; @@ -517,7 +518,7 @@ void for_packages(unsigned long long pkg_set, int (func)(int)) void print_version(void) { - printf("x86_energy_perf_policy 17.05.11 (C) Len Brown <len.brown@intel.com>\n"); + printf("x86_energy_perf_policy 2025.9.19 Len Brown <lenb@kernel.org>\n"); } void cmdline(int argc, char **argv) @@ -630,7 +631,7 @@ void cmdline(int argc, char **argv) */ FILE *fopen_or_die(const char *path, const char *mode) { - FILE *filep = fopen(path, "r"); + FILE *filep = fopen(path, mode); if (!filep) err(1, "%s: open failed", path); @@ -644,7 +645,7 @@ void err_on_hypervisor(void) char *buffer; /* On VMs /proc/cpuinfo contains a "flags" entry for hypervisor */ - cpuinfo = fopen_or_die("/proc/cpuinfo", "ro"); + cpuinfo = fopen_or_die("/proc/cpuinfo", "r"); buffer = malloc(4096); if (!buffer) { @@ -809,7 +810,7 @@ void print_hwp_request_pkg(int pkg, struct msr_hwp_request *h, char *str) h->hwp_min, h->hwp_max, h->hwp_desired, h->hwp_epp, h->hwp_window, h->hwp_window & 0x7F, (h->hwp_window >> 7) & 0x7); } -void read_hwp_request(int cpu, struct msr_hwp_request *hwp_req, unsigned int msr_offset) +void read_hwp_request_msr(int cpu, struct msr_hwp_request *hwp_req, unsigned int msr_offset) { unsigned long long msr; @@ -823,7 +824,7 @@ void read_hwp_request(int cpu, struct msr_hwp_request *hwp_req, unsigned int msr hwp_req->hwp_use_pkg = (((msr) >> 42) & 0x1); } -void write_hwp_request(int cpu, struct msr_hwp_request *hwp_req, unsigned int msr_offset) +void write_hwp_request_msr(int cpu, struct msr_hwp_request *hwp_req, unsigned int msr_offset) { unsigned long long msr = 0; @@ -843,7 +844,7 @@ void write_hwp_request(int cpu, struct msr_hwp_request *hwp_req, unsigned int ms put_msr(cpu, msr_offset, msr); } -static int get_epb(int cpu) +static int get_epb_sysfs(int cpu) { char path[SYSFS_PATH_MAX]; char linebuf[3]; @@ -865,7 +866,7 @@ static int get_epb(int cpu) return (int)val; } -static int set_epb(int cpu, int val) +static int set_epb_sysfs(int cpu, int val) { char path[SYSFS_PATH_MAX]; char linebuf[3]; @@ -895,14 +896,14 @@ int print_cpu_msrs(int cpu) struct msr_hwp_cap cap; int epb; - epb = get_epb(cpu); + epb = get_epb_sysfs(cpu); if (epb >= 0) printf("cpu%d: EPB %u\n", cpu, (unsigned int) epb); if (!has_hwp) return 0; - read_hwp_request(cpu, &req, MSR_HWP_REQUEST); + read_hwp_request_msr(cpu, &req, MSR_HWP_REQUEST); print_hwp_request(cpu, &req, ""); read_hwp_cap(cpu, &cap, MSR_HWP_CAPABILITIES); @@ -919,7 +920,7 @@ int print_pkg_msrs(int pkg) if (!has_hwp) return 0; - read_hwp_request(first_cpu_in_pkg[pkg], &req, MSR_HWP_REQUEST_PKG); + read_hwp_request_msr(first_cpu_in_pkg[pkg], &req, MSR_HWP_REQUEST_PKG); print_hwp_request_pkg(pkg, &req, ""); if (has_hwp_notify) { @@ -951,8 +952,10 @@ int ratio_2_sysfs_khz(int ratio) } /* * If HWP is enabled and cpufreq sysfs attribtes are present, - * then update sysfs, so that it will not become - * stale when we write to MSRs. + * then update via sysfs. The intel_pstate driver may modify (clip) + * this request, say, when HWP_CAP is outside of PLATFORM_INFO limits, + * and the driver-chosen value takes precidence. + * * (intel_pstate's max_perf_pct and min_perf_pct will follow cpufreq, * so we don't have to touch that.) */ @@ -1007,6 +1010,8 @@ int update_sysfs(int cpu) if (update_hwp_max) update_cpufreq_scaling_freq(1, cpu, req_update.hwp_max); + hwp_limits_done_via_sysfs = 1; + return 0; } @@ -1074,21 +1079,21 @@ int check_hwp_request_v_hwp_capabilities(int cpu, struct msr_hwp_request *req, s return 0; } -int update_hwp_request(int cpu) +int update_hwp_request_msr(int cpu) { struct msr_hwp_request req; struct msr_hwp_cap cap; int msr_offset = MSR_HWP_REQUEST; - read_hwp_request(cpu, &req, msr_offset); + read_hwp_request_msr(cpu, &req, msr_offset); if (debug) print_hwp_request(cpu, &req, "old: "); - if (update_hwp_min) + if (update_hwp_min && !hwp_limits_done_via_sysfs) req.hwp_min = req_update.hwp_min; - if (update_hwp_max) + if (update_hwp_max && !hwp_limits_done_via_sysfs) req.hwp_max = req_update.hwp_max; if (update_hwp_desired) @@ -1111,15 +1116,15 @@ int update_hwp_request(int cpu) verify_hwp_req_self_consistency(cpu, &req); - write_hwp_request(cpu, &req, msr_offset); + write_hwp_request_msr(cpu, &req, msr_offset); if (debug) { - read_hwp_request(cpu, &req, msr_offset); + read_hwp_request_msr(cpu, &req, msr_offset); print_hwp_request(cpu, &req, "new: "); } return 0; } -int update_hwp_request_pkg(int pkg) +int update_hwp_request_pkg_msr(int pkg) { struct msr_hwp_request req; struct msr_hwp_cap cap; @@ -1127,7 +1132,7 @@ int update_hwp_request_pkg(int pkg) int msr_offset = MSR_HWP_REQUEST_PKG; - read_hwp_request(cpu, &req, msr_offset); + read_hwp_request_msr(cpu, &req, msr_offset); if (debug) print_hwp_request_pkg(pkg, &req, "old: "); @@ -1155,10 +1160,10 @@ int update_hwp_request_pkg(int pkg) verify_hwp_req_self_consistency(cpu, &req); - write_hwp_request(cpu, &req, msr_offset); + write_hwp_request_msr(cpu, &req, msr_offset); if (debug) { - read_hwp_request(cpu, &req, msr_offset); + read_hwp_request_msr(cpu, &req, msr_offset); print_hwp_request_pkg(pkg, &req, "new: "); } return 0; @@ -1166,30 +1171,39 @@ int update_hwp_request_pkg(int pkg) int enable_hwp_on_cpu(int cpu) { - unsigned long long msr; + unsigned long long old_msr, new_msr; + + get_msr(cpu, MSR_PM_ENABLE, &old_msr); + + if (old_msr & 1) + return 0; /* already enabled */ - get_msr(cpu, MSR_PM_ENABLE, &msr); - put_msr(cpu, MSR_PM_ENABLE, 1); + new_msr = old_msr | 1; + put_msr(cpu, MSR_PM_ENABLE, new_msr); if (verbose) - printf("cpu%d: MSR_PM_ENABLE old: %d new: %d\n", cpu, (unsigned int) msr, 1); + printf("cpu%d: MSR_PM_ENABLE old: %llX new: %llX\n", cpu, old_msr, new_msr); return 0; } -int update_cpu_msrs(int cpu) +int update_cpu_epb_sysfs(int cpu) { - unsigned long long msr; int epb; - if (update_epb) { - epb = get_epb(cpu); - set_epb(cpu, new_epb); + epb = get_epb_sysfs(cpu); + set_epb_sysfs(cpu, new_epb); - if (verbose) - printf("cpu%d: ENERGY_PERF_BIAS old: %d new: %d\n", - cpu, epb, (unsigned int) new_epb); - } + if (verbose) + printf("cpu%d: ENERGY_PERF_BIAS old: %d new: %d\n", + cpu, epb, (unsigned int) new_epb); + + return 0; +} + +int update_cpu_msrs(int cpu) +{ + unsigned long long msr; if (update_turbo) { int turbo_is_present_and_disabled; @@ -1224,7 +1238,7 @@ int update_cpu_msrs(int cpu) if (!hwp_update_enabled()) return 0; - update_hwp_request(cpu); + update_hwp_request_msr(cpu); return 0; } @@ -1312,6 +1326,17 @@ void for_all_cpus_in_set(size_t set_size, cpu_set_t *cpu_set, int (func)(int)) if (CPU_ISSET_S(cpu_num, set_size, cpu_set)) func(cpu_num); } +int for_all_cpus_in_set_and(size_t set_size, cpu_set_t *cpu_set, int (func)(int)) +{ + int cpu_num; + int retval = 1; + + for (cpu_num = 0; cpu_num <= max_cpu_num; ++cpu_num) + if (CPU_ISSET_S(cpu_num, set_size, cpu_set)) + retval &= func(cpu_num); + + return retval; +} void init_data_structures(void) { @@ -1326,21 +1351,38 @@ void init_data_structures(void) for_all_proc_cpus(mark_cpu_present); } -/* clear has_hwp if it is not enable (or being enabled) */ +int is_hwp_enabled_on_cpu(int cpu_num) +{ + unsigned long long msr; + int retval; + + /* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */ + get_msr(cpu_num, MSR_PM_ENABLE, &msr); + retval = (msr & 1); + + if (verbose) + fprintf(stderr, "cpu%d: %sHWP\n", cpu_num, retval ? "" : "No-"); + + return retval; +} +/* + * verify_hwp_is_enabled() + * + * Set (has_hwp=0) if no HWP feature or any of selected CPU set does not have HWP enabled + */ void verify_hwp_is_enabled(void) { - unsigned long long msr; + int retval; if (!has_hwp) /* set in early_cpuid() */ return; - /* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */ - get_msr(base_cpu, MSR_PM_ENABLE, &msr); - if ((msr & 1) == 0) { + retval = for_all_cpus_in_set_and(cpu_setsize, cpu_selected_set, is_hwp_enabled_on_cpu); + + if (retval == 0) { fprintf(stderr, "HWP can be enabled using '--hwp-enable'\n"); has_hwp = 0; - return; } } @@ -1551,10 +1593,13 @@ int main(int argc, char **argv) /* update CPU set */ if (cpu_selected_set) { + if (update_epb) + for_all_cpus_in_set(cpu_setsize, cpu_selected_set, update_cpu_epb_sysfs); for_all_cpus_in_set(cpu_setsize, cpu_selected_set, update_sysfs); for_all_cpus_in_set(cpu_setsize, cpu_selected_set, update_cpu_msrs); + } else if (pkg_selected_set) - for_packages(pkg_selected_set, update_hwp_request_pkg); + for_packages(pkg_selected_set, update_hwp_request_pkg_msr); return 0; } |