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tools/power turbostat: Dump RAPL sysfs info

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for example:

intel-rapl:1: psys 28.0s:100W 976.0us:100W
intel-rapl:0: package-0 28.0s:57W,max:15W 2.4ms:57W
intel-rapl:0/intel-rapl:0:0: core disabled
intel-rapl:0/intel-rapl:0:1: uncore disabled
intel-rapl-mmio:0: package-0 28.0s:28W,max:15W 2.4ms:57W

[lenb: simplified format]

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

squish me

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang Rui 2025-05-30 14:01:31 +08:00 committed by Len Brown
parent 69078520fd
commit 2a535d6cc3
1 changed files with 156 additions and 0 deletions
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156
tools/power/x86/turbostat/turbostat.c
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@ -7404,6 +7404,160 @@ void print_power_limit_msr(int cpu, unsigned long long msr, char *label)
return;
}
static int fread_int(char *path, int *val)
{
FILE *filep;
int ret;
filep = fopen (path, "r");
if (!filep)
return -1;
ret = fscanf(filep, "%d", val);
fclose(filep);
return ret;
}
static int fread_ull(char *path, unsigned long long *val)
{
FILE *filep;
int ret;
filep = fopen (path, "r");
if (!filep)
return -1;
ret = fscanf(filep, "%llu", val);
fclose(filep);
return ret;
}
static int fread_str(char *path, char *buf, int size)
{
FILE *filep;
int ret;
char *cp;
filep = fopen (path, "r");
if (!filep)
return -1;
ret = fread(buf, 1, size, filep);
fclose(filep);
/* replace '\n' with '\0' */
cp = strchr(buf, '\n');
if (cp != NULL)
*cp = '\0';
return ret;
}
#define PATH_RAPL_SYSFS "/sys/class/powercap"
static int dump_one_domain(char *domain_path)
{
char path[PATH_MAX];
char str[PATH_MAX];
unsigned long long val;
int constraint;
int enable;
int ret;
snprintf(path, PATH_MAX, "%s/name", domain_path);
ret = fread_str(path, str, PATH_MAX);
if (ret <= 0)
return -1;
fprintf(outf, "%s: %s", domain_path + strlen(PATH_RAPL_SYSFS) + 1, str);
snprintf(path, PATH_MAX, "%s/enabled", domain_path);
ret = fread_int(path, &enable);
if (ret <= 0)
return -1;
if (!enable) {
fputs(" disabled\n", outf);
return 0;
}
for (constraint = 0;; constraint++)
{
snprintf(path, PATH_MAX, "%s/constraint_%d_time_window_us", domain_path, constraint);
ret = fread_ull(path, &val);
if (ret <= 0)
break;
if (val > 1000000)
fprintf(outf, " %0.1fs", (double)val/1000000);
else if (val > 1000)
fprintf(outf, " %0.1fms", (double)val/1000);
else
fprintf(outf, " %0.1fus", (double)val);
snprintf(path, PATH_MAX, "%s/constraint_%d_power_limit_uw", domain_path, constraint);
ret = fread_ull(path, &val);
if (ret > 0 && val)
fprintf(outf, ":%lluW", val / 1000000);
snprintf(path, PATH_MAX, "%s/constraint_%d_max_power_uw", domain_path, constraint);
ret = fread_ull(path, &val);
if (ret > 0 && val)
fprintf(outf, ",max:%lluW", val / 1000000);
}
fputc('\n', outf);
return 0;
}
static int print_rapl_sysfs(void)
{
DIR *dir, *cdir;
struct dirent *entry, *centry;
char path[PATH_MAX];
char str[PATH_MAX];
if ((dir = opendir(PATH_RAPL_SYSFS)) == NULL) {
warn("open %s failed", PATH_RAPL_SYSFS);
return 1;
}
while ((entry = readdir (dir)) != NULL) {
if (strlen(entry->d_name) > 100)
continue;
if (strncmp(entry->d_name, "intel-rapl", strlen("intel-rapl")))
continue;
snprintf(path, PATH_MAX, "%s/%s/name", PATH_RAPL_SYSFS, entry->d_name);
/* Parse top level domains first, including package and psys */
fread_str(path, str, PATH_MAX);
if (strncmp(str, "package", strlen("package")) &&
strncmp(str, "psys", strlen("psys")))
continue;
snprintf(path, PATH_MAX, "%s/%s", PATH_RAPL_SYSFS, entry->d_name);
if ((cdir = opendir(path)) == NULL) {
perror ("opendir() error");
return 1;
}
dump_one_domain(path);
while ((centry = readdir (cdir)) != NULL) {
if (strncmp(centry->d_name, "intel-rapl", strlen("intel-rapl")))
continue;
snprintf(path, PATH_MAX, "%s/%s/%s", PATH_RAPL_SYSFS, entry->d_name, centry->d_name);
dump_one_domain(path);
}
closedir(cdir);
}
closedir(dir);
return 0;
}
int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
{
unsigned long long msr;
@ -7538,6 +7692,8 @@ void probe_rapl(void)
if (quiet)
return;
print_rapl_sysfs();
if (!platform->rapl_msrs || no_msr)
return;