Commit 2612ae59 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Hans de Goede
Browse files

tools/power/x86/intel-speed-select: Adjust uncore max/min frequency 



When perf level is changed, uncore limits can change. Set the uncore
limits via Linux uncore sysfs, when user changes perf level with
-o option.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 61f9fdcd

tools/power/x86/intel-speed-select/isst-config.c

+36 −0
Original line number Diff line number Diff line
@@ -1319,6 +1319,34 @@ static void dump_isst_config(int arg) 
	isst_ctdp_display_information_end(outf);

}



static int set_uncore_min_max(struct isst_id *id, int max, int freq)

{

	char buffer[128], freq_str[16];

	int fd, ret, len;



	if (max)

		snprintf(buffer, sizeof(buffer),

			 "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/max_freq_khz", id->pkg, id->die);

	else

		snprintf(buffer, sizeof(buffer),

			 "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/min_freq_khz", id->pkg, id->die);



	fd = open(buffer, O_WRONLY);

	if (fd < 0)

		return fd;



	snprintf(freq_str, sizeof(freq_str), "%d", freq);

	len = strlen(freq_str);

	ret = write(fd, freq_str, len);

	if (ret == -1) {

		close(fd);

		return ret;

	}

	close(fd);



	return 0;

}



static void adjust_scaling_max_from_base_freq(int cpu);



static void set_tdp_level_for_cpu(struct isst_id *id, void *arg1, void *arg2, void *arg3,
@@ -1340,6 +1368,14 @@ static void set_tdp_level_for_cpu(struct isst_id *id, void *arg1, void *arg2, vo 
			/* Wait for updated base frequencies */

			usleep(2000);



			/* Adjusting uncore freq */

			isst_get_uncore_p0_p1_info(id, tdp_level, &ctdp_level);

			if (ctdp_level.uncore_pm)

				set_uncore_min_max(id, 0, ctdp_level.uncore_pm * 100000);



			if (ctdp_level.uncore_p0)

				set_uncore_min_max(id, 1, ctdp_level.uncore_p0 * 100000);



			fprintf(stderr, "Option is set to online/offline\n");

			ctdp_level.core_cpumask_size =

				alloc_cpu_set(&ctdp_level.core_cpumask);