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

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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: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2023-01-17 14:34:27 -08:00 committed by Hans de Goede
parent 61f9fdcdcd
commit 2612ae5961
1 changed files with 36 additions and 0 deletions
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36
tools/power/x86/intel-speed-select/isst-config.c
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@ -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);