diff options
| -rw-r--r-- | Documentation/cpu-freq/intel-pstate.txt | 4 | ||||
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 18 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt index 765d7fc0e692..7767ce6756be 100644 --- a/Documentation/cpu-freq/intel-pstate.txt +++ b/Documentation/cpu-freq/intel-pstate.txt @@ -37,6 +37,10 @@ controlling P state selection. These files have been added to no_turbo: limits the driver to selecting P states below the turbo frequency range. + turbo_pct: displays the percentage of the total performance that + is supported by hardware that is in the turbo range. This number + is independent of whether turbo has been disabled or not. + For contemporary Intel processors, the frequency is controlled by the processor itself and the P-states exposed to software are related to performance levels. The idea that frequency can be set to a single diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 7d9f822f2031..ed6dd7dac094 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -338,6 +338,22 @@ static void __init intel_pstate_debug_expose_params(void) return sprintf(buf, "%u\n", limits.object); \ } +static ssize_t show_turbo_pct(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct cpudata *cpu; + int total, no_turbo, turbo_pct; + uint32_t turbo_fp; + + cpu = all_cpu_data[0]; + + total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1; + no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1; + turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total)); + turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100))); + return sprintf(buf, "%u\n", turbo_pct); +} + static ssize_t show_no_turbo(struct kobject *kobj, struct attribute *attr, char *buf) { @@ -418,11 +434,13 @@ show_one(min_perf_pct, min_perf_pct); define_one_global_rw(no_turbo); define_one_global_rw(max_perf_pct); define_one_global_rw(min_perf_pct); +define_one_global_ro(turbo_pct); static struct attribute *intel_pstate_attributes[] = { &no_turbo.attr, &max_perf_pct.attr, &min_perf_pct.attr, + &turbo_pct.attr, NULL }; |