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author | Thomas Renninger <trenn@suse.de> | 2013-06-28 17:34:31 +0400 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-05 03:52:19 +0400 |
commit | c4f3610eba69321b9cf35779cd67e68b5138cc16 (patch) | |
tree | 1e290acedef8572a22812c98709cf0754f5d36a9 /tools/power/cpupower/utils/cpuidle-set.c | |
parent | 0924c369bc5492cf181a066fc2d459aa18ffa5ac (diff) | |
download | linux-c4f3610eba69321b9cf35779cd67e68b5138cc16.tar.xz |
cpupower: Introduce idle-set subcommand and C-state enabling/disabling
Example:
cpupower idle-set -d 3
will disable C-state 3 on all processors (set commands are active on
all CPUs by default), same as:
cpupower -c all idle-set -d 3
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power/cpupower/utils/cpuidle-set.c')
-rw-r--r-- | tools/power/cpupower/utils/cpuidle-set.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpuidle-set.c b/tools/power/cpupower/utils/cpuidle-set.c new file mode 100644 index 000000000000..c78141c5dfac --- /dev/null +++ b/tools/power/cpupower/utils/cpuidle-set.c @@ -0,0 +1,118 @@ +#include <unistd.h> +#include <stdio.h> +#include <errno.h> +#include <stdlib.h> +#include <limits.h> +#include <string.h> +#include <ctype.h> + +#include <getopt.h> + +#include "cpufreq.h" +#include "helpers/helpers.h" +#include "helpers/sysfs.h" + +static struct option info_opts[] = { + { .name = "disable", .has_arg = required_argument, .flag = NULL, .val = 'd'}, + { .name = "enable", .has_arg = required_argument, .flag = NULL, .val = 'e'}, + { }, +}; + + +int cmd_idle_set(int argc, char **argv) +{ + extern char *optarg; + extern int optind, opterr, optopt; + int ret = 0, cont = 1, param = 0, idlestate = 0; + unsigned int cpu = 0; + + do { + ret = getopt_long(argc, argv, "d:e:", info_opts, NULL); + if (ret == -1) + break; + switch (ret) { + case '?': + param = '?'; + cont = 0; + break; + case 'd': + if (param) { + param = -1; + cont = 0; + break; + } + param = ret; + idlestate = atoi(optarg); + break; + case 'e': + if (param) { + param = -1; + cont = 0; + break; + } + param = ret; + idlestate = atoi(optarg); + break; + case -1: + cont = 0; + break; + } + } while (cont); + + switch (param) { + case -1: + printf(_("You can't specify more than one " + "output-specific argument\n")); + exit(EXIT_FAILURE); + case '?': + printf(_("invalid or unknown argument\n")); + exit(EXIT_FAILURE); + } + + /* Default is: set all CPUs */ + if (bitmask_isallclear(cpus_chosen)) + bitmask_setall(cpus_chosen); + + for (cpu = bitmask_first(cpus_chosen); + cpu <= bitmask_last(cpus_chosen); cpu++) { + + if (!bitmask_isbitset(cpus_chosen, cpu)) + continue; + + switch (param) { + + case 'd': + ret = sysfs_idlestate_disable(cpu, idlestate, 1); + if (ret == 0) + printf(_("Idlestate %u disabled on CPU %u\n"), idlestate, cpu); + else if (ret == -1) + printf(_("Idlestate %u not available on CPU %u\n"), + idlestate, cpu); + else if (ret == -2) + printf(_("Idlestate disabling not supported by kernel\n")); + else + printf(_("Idlestate %u not disabled on CPU %u\n"), + idlestate, cpu); + break; + case 'e': + ret = sysfs_idlestate_disable(cpu, idlestate, 0); + if (ret == 0) + printf(_("Idlestate %u enabled on CPU %u\n"), idlestate, cpu); + else if (ret == -1) + printf(_("Idlestate %u not available on CPU %u\n"), + idlestate, cpu); + else if (ret == -2) + printf(_("Idlestate enabling not supported by kernel\n")); + else + printf(_("Idlestate %u not enabled on CPU %u\n"), + idlestate, cpu); + break; + default: + /* Not reachable with proper args checking */ + printf(_("Invalid or unknown argument\n")); + exit(EXIT_FAILURE); + break; + } + } + return EXIT_SUCCESS; +} |