aboutsummaryrefslogtreecommitdiff
path: root/tools/power
diff options
context:
space:
mode:
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/cpupower/lib/cpupower.c23
-rw-r--r--tools/power/cpupower/lib/cpupower_intern.h5
-rw-r--r--tools/power/cpupower/utils/cpupower-info.c2
-rw-r--r--tools/power/cpupower/utils/cpupower-set.c2
-rw-r--r--tools/power/cpupower/utils/helpers/helpers.h8
-rw-r--r--tools/power/cpupower/utils/helpers/misc.c48
-rw-r--r--tools/power/cpupower/utils/helpers/msr.c28
-rw-r--r--tools/power/x86/turbostat/turbostat.c29
-rw-r--r--tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c109
9 files changed, 204 insertions, 50 deletions
diff --git a/tools/power/cpupower/lib/cpupower.c b/tools/power/cpupower/lib/cpupower.c
index 3656e697537e..3f7d0c0c5067 100644
--- a/tools/power/cpupower/lib/cpupower.c
+++ b/tools/power/cpupower/lib/cpupower.c
@@ -16,8 +16,8 @@
unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen)
{
- int fd;
ssize_t numread;
+ int fd;
fd = open(path, O_RDONLY);
if (fd == -1)
@@ -35,6 +35,27 @@ unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen)
return (unsigned int) numread;
}
+unsigned int cpupower_write_sysfs(const char *path, char *buf, size_t buflen)
+{
+ ssize_t numwritten;
+ int fd;
+
+ fd = open(path, O_WRONLY);
+ if (fd == -1)
+ return 0;
+
+ numwritten = write(fd, buf, buflen - 1);
+ if (numwritten < 1) {
+ perror(path);
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+
+ return (unsigned int) numwritten;
+}
+
/*
* Detect whether a CPU is online
*
diff --git a/tools/power/cpupower/lib/cpupower_intern.h b/tools/power/cpupower/lib/cpupower_intern.h
index 4887c76d23f8..ac1112b956ec 100644
--- a/tools/power/cpupower/lib/cpupower_intern.h
+++ b/tools/power/cpupower/lib/cpupower_intern.h
@@ -1,6 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0 */
#define PATH_TO_CPU "/sys/devices/system/cpu/"
+
+#ifndef MAX_LINE_LEN
#define MAX_LINE_LEN 4096
+#endif
+
#define SYSFS_PATH_MAX 255
unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen);
+unsigned int cpupower_write_sysfs(const char *path, char *buf, size_t buflen);
diff --git a/tools/power/cpupower/utils/cpupower-info.c b/tools/power/cpupower/utils/cpupower-info.c
index 0ba61a2c4d81..06345b543786 100644
--- a/tools/power/cpupower/utils/cpupower-info.c
+++ b/tools/power/cpupower/utils/cpupower-info.c
@@ -101,7 +101,7 @@ int cmd_info(int argc, char **argv)
}
if (params.perf_bias) {
- ret = msr_intel_get_perf_bias(cpu);
+ ret = cpupower_intel_get_perf_bias(cpu);
if (ret < 0) {
fprintf(stderr,
_("Could not read perf-bias value[%d]\n"), ret);
diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c
index 052044d7e012..180d5ba877e6 100644
--- a/tools/power/cpupower/utils/cpupower-set.c
+++ b/tools/power/cpupower/utils/cpupower-set.c
@@ -95,7 +95,7 @@ int cmd_set(int argc, char **argv)
}
if (params.perf_bias) {
- ret = msr_intel_set_perf_bias(cpu, perf_bias);
+ ret = cpupower_intel_set_perf_bias(cpu, perf_bias);
if (ret) {
fprintf(stderr, _("Error setting perf-bias "
"value on CPU %d\n"), cpu);
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index c258eeccd05f..37dac161f3fe 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -105,8 +105,8 @@ extern struct cpupower_cpu_info cpupower_cpu_info;
extern int read_msr(int cpu, unsigned int idx, unsigned long long *val);
extern int write_msr(int cpu, unsigned int idx, unsigned long long val);
-extern int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val);
-extern int msr_intel_get_perf_bias(unsigned int cpu);
+extern int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val);
+extern int cpupower_intel_get_perf_bias(unsigned int cpu);
extern unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu);
/* Read/Write msr ****************************/
@@ -150,9 +150,9 @@ static inline int read_msr(int cpu, unsigned int idx, unsigned long long *val)
{ return -1; };
static inline int write_msr(int cpu, unsigned int idx, unsigned long long val)
{ return -1; };
-static inline int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val)
+static inline int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
{ return -1; };
-static inline int msr_intel_get_perf_bias(unsigned int cpu)
+static inline int cpupower_intel_get_perf_bias(unsigned int cpu)
{ return -1; };
static inline unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
{ return 0; };
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index f406adc40bad..e8f8f643a627 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -1,7 +1,15 @@
// SPDX-License-Identifier: GPL-2.0
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
#if defined(__i386__) || defined(__x86_64__)
#include "helpers/helpers.h"
+#include "helpers/sysfs.h"
+
+#include "cpupower_intern.h"
#define MSR_AMD_HWCR 0xc0010015
@@ -40,4 +48,44 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
*support = *active = 1;
return 0;
}
+
+int cpupower_intel_get_perf_bias(unsigned int cpu)
+{
+ char linebuf[MAX_LINE_LEN];
+ char path[SYSFS_PATH_MAX];
+ unsigned long val;
+ char *endp;
+
+ if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
+ return -1;
+
+ snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
+
+ if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0)
+ return -1;
+
+ val = strtol(linebuf, &endp, 0);
+ if (endp == linebuf || errno == ERANGE)
+ return -1;
+
+ return val;
+}
+
+int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
+{
+ char path[SYSFS_PATH_MAX];
+ char linebuf[3] = {};
+
+ if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
+ return -1;
+
+ snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
+ snprintf(linebuf, sizeof(linebuf), "%d", val);
+
+ if (cpupower_write_sysfs(path, linebuf, 3) <= 0)
+ return -1;
+
+ return 0;
+}
+
#endif /* #if defined(__i386__) || defined(__x86_64__) */
diff --git a/tools/power/cpupower/utils/helpers/msr.c b/tools/power/cpupower/utils/helpers/msr.c
index ab9950748838..8b0b6be74bb8 100644
--- a/tools/power/cpupower/utils/helpers/msr.c
+++ b/tools/power/cpupower/utils/helpers/msr.c
@@ -11,7 +11,6 @@
/* Intel specific MSRs */
#define MSR_IA32_PERF_STATUS 0x198
#define MSR_IA32_MISC_ENABLES 0x1a0
-#define MSR_IA32_ENERGY_PERF_BIAS 0x1b0
#define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1ad
/*
@@ -73,33 +72,6 @@ int write_msr(int cpu, unsigned int idx, unsigned long long val)
return -1;
}
-int msr_intel_get_perf_bias(unsigned int cpu)
-{
- unsigned long long val;
- int ret;
-
- if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
- return -1;
-
- ret = read_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &val);
- if (ret)
- return ret;
- return val;
-}
-
-int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val)
-{
- int ret;
-
- if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
- return -1;
-
- ret = write_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, val);
- if (ret)
- return ret;
- return 0;
-}
-
unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
{
unsigned long long val;
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index f3a1746f7f45..389ea5209a83 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1831,6 +1831,25 @@ int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
return 0;
}
+int get_epb(int cpu)
+{
+ char path[128 + PATH_BYTES];
+ int ret, epb = -1;
+ FILE *fp;
+
+ sprintf(path, "/sys/devices/system/cpu/cpu%d/power/energy_perf_bias", cpu);
+
+ fp = fopen_or_die(path, "r");
+
+ ret = fscanf(fp, "%d", &epb);
+ if (ret != 1)
+ err(1, "%s(%s)", __func__, path);
+
+ fclose(fp);
+
+ return epb;
+}
+
void get_apic_id(struct thread_data *t)
{
unsigned int eax, ebx, ecx, edx;
@@ -3917,9 +3936,8 @@ dump_sysfs_pstate_config(void)
*/
int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p)
{
- unsigned long long msr;
char *epb_string;
- int cpu;
+ int cpu, epb;
if (!has_epb)
return 0;
@@ -3935,10 +3953,11 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p)
return -1;
}
- if (get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr))
+ epb = get_epb(cpu);
+ if (epb < 0)
return 0;
- switch (msr & 0xF) {
+ switch (epb) {
case ENERGY_PERF_BIAS_PERFORMANCE:
epb_string = "performance";
break;
@@ -3952,7 +3971,7 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p)
epb_string = "custom";
break;
}
- fprintf(outf, "cpu%d: MSR_IA32_ENERGY_PERF_BIAS: 0x%08llx (%s)\n", cpu, msr, epb_string);
+ fprintf(outf, "cpu%d: EPB: %d (%s)\n", cpu, epb, epb_string);
return 0;
}
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 ff6c6661f075..5fd9e594079c 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
@@ -91,6 +91,9 @@ unsigned int has_hwp_request_pkg; /* IA32_HWP_REQUEST_PKG */
unsigned int bdx_highest_ratio;
+#define PATH_TO_CPU "/sys/devices/system/cpu/"
+#define SYSFS_PATH_MAX 255
+
/*
* maintain compatibility with original implementation, but don't document it:
*/
@@ -721,6 +724,48 @@ int put_msr(int cpu, int offset, unsigned long long new_msr)
return 0;
}
+static unsigned int read_sysfs(const char *path, char *buf, size_t buflen)
+{
+ ssize_t numread;
+ int fd;
+
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ return 0;
+
+ numread = read(fd, buf, buflen - 1);
+ if (numread < 1) {
+ close(fd);
+ return 0;
+ }
+
+ buf[numread] = '\0';
+ close(fd);
+
+ return (unsigned int) numread;
+}
+
+static unsigned int write_sysfs(const char *path, char *buf, size_t buflen)
+{
+ ssize_t numwritten;
+ int fd;
+
+ fd = open(path, O_WRONLY);
+ if (fd == -1)
+ return 0;
+
+ numwritten = write(fd, buf, buflen - 1);
+ if (numwritten < 1) {
+ perror("write failed\n");
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+
+ return (unsigned int) numwritten;
+}
+
void print_hwp_cap(int cpu, struct msr_hwp_cap *cap, char *str)
{
if (cpu != -1)
@@ -798,17 +843,61 @@ 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)
+{
+ char path[SYSFS_PATH_MAX];
+ char linebuf[3];
+ char *endp;
+ long val;
+
+ if (!has_epb)
+ return -1;
+
+ snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
+
+ if (!read_sysfs(path, linebuf, 3))
+ return -1;
+
+ val = strtol(linebuf, &endp, 0);
+ if (endp == linebuf || errno == ERANGE)
+ return -1;
+
+ return (int)val;
+}
+
+static int set_epb(int cpu, int val)
+{
+ char path[SYSFS_PATH_MAX];
+ char linebuf[3];
+ char *endp;
+ int ret;
+
+ if (!has_epb)
+ return -1;
+
+ snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
+ snprintf(linebuf, sizeof(linebuf), "%d", val);
+
+ ret = write_sysfs(path, linebuf, 3);
+ if (ret <= 0)
+ return -1;
+
+ val = strtol(linebuf, &endp, 0);
+ if (endp == linebuf || errno == ERANGE)
+ return -1;
+
+ return (int)val;
+}
+
int print_cpu_msrs(int cpu)
{
- unsigned long long msr;
struct msr_hwp_request req;
struct msr_hwp_cap cap;
+ int epb;
- if (has_epb) {
- get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
-
- printf("cpu%d: EPB %u\n", cpu, (unsigned int) msr);
- }
+ epb = get_epb(cpu);
+ if (epb >= 0)
+ printf("cpu%d: EPB %u\n", cpu, (unsigned int) epb);
if (!has_hwp)
return 0;
@@ -1091,15 +1180,15 @@ int enable_hwp_on_cpu(int cpu)
int update_cpu_msrs(int cpu)
{
unsigned long long msr;
-
+ int epb;
if (update_epb) {
- get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
- put_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, new_epb);
+ epb = get_epb(cpu);
+ set_epb(cpu, new_epb);
if (verbose)
printf("cpu%d: ENERGY_PERF_BIAS old: %d new: %d\n",
- cpu, (unsigned int) msr, (unsigned int) new_epb);
+ cpu, epb, (unsigned int) new_epb);
}
if (update_turbo) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 19:05:18 +0000