diff options
Diffstat (limited to 'tools/power/cpupower/utils/cpupower.c')
| -rw-r--r-- | tools/power/cpupower/utils/cpupower.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c index 9ea914378985..2dccf4998599 100644 --- a/tools/power/cpupower/utils/cpupower.c +++ b/tools/power/cpupower/utils/cpupower.c @@ -12,6 +12,7 @@ #include <string.h> #include <unistd.h> #include <errno.h> +#include <sched.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/utsname.h> @@ -31,6 +32,7 @@ static int cmd_help(int argc, const char **argv); */ struct cpupower_cpu_info cpupower_cpu_info; int run_as_root; +int base_cpu; /* Affected cpus chosen by -c/--cpu param */ struct bitmask *cpus_chosen; @@ -174,6 +176,7 @@ int main(int argc, const char *argv[]) unsigned int i, ret; struct stat statbuf; struct utsname uts; + char pathname[32]; cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF)); @@ -198,17 +201,23 @@ int main(int argc, const char *argv[]) argv[0] = cmd = "help"; } - get_cpu_info(0, &cpupower_cpu_info); + base_cpu = sched_getcpu(); + if (base_cpu < 0) { + fprintf(stderr, _("No valid cpus found.\n")); + return EXIT_FAILURE; + } + + get_cpu_info(&cpupower_cpu_info); run_as_root = !geteuid(); if (run_as_root) { ret = uname(&uts); + sprintf(pathname, "/dev/cpu/%d/msr", base_cpu); if (!ret && !strcmp(uts.machine, "x86_64") && - stat("/dev/cpu/0/msr", &statbuf) != 0) { + stat(pathname, &statbuf) != 0) { if (system("modprobe msr") == -1) fprintf(stderr, _("MSR access not available.\n")); } } - for (i = 0; i < ARRAY_SIZE(commands); i++) { struct cmd_struct *p = commands + i; |