Commit eb426fc6 authored by Wyes Karny's avatar Wyes Karny Committed by Shuah Khan
Browse files

cpupower: Add turbo-boost support in cpupower 



If boost sysfs (/sys/devices/system/cpu/cpufreq/boost) file is present
turbo-boost is feature is supported in the hardware. By default this
feature should be enabled. But to disable/enable it write to the sysfs
file. Use the same to control this feature via cpupower.

To enable:
cpupower set --turbo-boost 1

To disable:
cpupower set --turbo-boost 0

Acked-by: default avatarHuang Rui <ray.huang@amd.com>
Reviewed-by: default avatarGautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarWyes Karny <wyes.karny@amd.com>
Tested-by: default avatarPerry Yuan <Perry.Yuan@amd.com>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent df8776b0

tools/power/cpupower/utils/cpupower-set.c

+21 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ static struct option set_opts[] = { 
	{"perf-bias", required_argument, NULL, 'b'},

	{"epp", required_argument, NULL, 'e'},

	{"amd-pstate-mode", required_argument, NULL, 'm'},

	{"turbo-boost", required_argument, NULL, 't'},

	{ },

};
@@ -41,10 +42,11 @@ int cmd_set(int argc, char **argv) 
			int perf_bias:1;

			int epp:1;

			int mode:1;

			int turbo_boost:1;

		};

		int params;

	} params;

	int perf_bias = 0;

	int perf_bias = 0, turbo_boost = 1;

	int ret = 0;

	char epp[30], mode[20];
@@ -94,6 +96,18 @@ int cmd_set(int argc, char **argv) 
			}

			params.mode = 1;

			break;

		case 't':

			if (params.turbo_boost)

				print_wrong_arg_exit();

			turbo_boost = atoi(optarg);

			if (turbo_boost < 0 || turbo_boost > 1) {

				printf("--turbo-boost param out of range [0-1]\n");

				print_wrong_arg_exit();

			}

			params.turbo_boost = 1;

			break;





		default:

			print_wrong_arg_exit();

		}
@@ -108,6 +122,12 @@ int cmd_set(int argc, char **argv) 
			fprintf(stderr, "Error setting mode\n");

	}



	if (params.turbo_boost) {

		ret = cpupower_set_turbo_boost(turbo_boost);

		if (ret)

			fprintf(stderr, "Error setting turbo-boost\n");

	}



	/* Default is: set all CPUs */

	if (bitmask_isallclear(cpus_chosen))

		bitmask_setall(cpus_chosen);

tools/power/cpupower/utils/helpers/helpers.h

+3 −0
Original line number Diff line number Diff line
@@ -118,6 +118,7 @@ extern unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu); 


extern int cpupower_set_epp(unsigned int cpu, char *epp);

extern int cpupower_set_amd_pstate_mode(char *mode);

extern int cpupower_set_turbo_boost(int turbo_boost);



/* Read/Write msr ****************************/
@@ -180,6 +181,8 @@ static inline int cpupower_set_epp(unsigned int cpu, char *epp) 
{ return -1; };

static inline int cpupower_set_amd_pstate_mode(char *mode)

{ return -1; };

static inline int cpupower_set_turbo_boost(int turbo_boost)

{ return -1; };



/* Read/Write msr ****************************/

tools/power/cpupower/utils/helpers/misc.c

+18 −0
Original line number Diff line number Diff line
@@ -124,6 +124,24 @@ int cpupower_set_amd_pstate_mode(char *mode) 
	return 0;

}



int cpupower_set_turbo_boost(int turbo_boost)

{

	char path[SYSFS_PATH_MAX];

	char linebuf[2] = {};



	snprintf(path, sizeof(path), PATH_TO_CPU "cpufreq/boost");



	if (!is_valid_path(path))

		return -1;



	snprintf(linebuf, sizeof(linebuf), "%d", turbo_boost);



	if (cpupower_write_sysfs(path, linebuf, 2) <= 0)

		return -1;



	return 0;

}



bool cpupower_amd_pstate_enabled(void)

{

	char *driver = cpufreq_get_driver(0);