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intel_pstate: Remove energy reporting from pstate_sample tracepoint 

Remove the reporting of energy since it does not provide any useful
information about the state of the driver and will be a maintainance
headache going forward since the RAPL energy units register is not
architectural and subject to change between micro-architectures

References: https://bugzilla.kernel.org/show_bug.cgi?id=69831
Fixes: b69880f9cc (intel_pstate: Add trace point to report internal state.)
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dirk Brandewie 2014-02-12 10:01:03 -08:00 committed by Rafael J. Wysocki
parent fcb6a15c2e
commit 709c078e17
2 changed files with 1 additions and 15 deletions
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9
drivers/cpufreq/intel_pstate.c
View File

@ -51,8 +51,6 @@ static inline int32_t div_fp(int32_t x, int32_t y)
return div_s64((int64_t)x << FRAC_BITS, (int64_t)y);
}
static u64 energy_divisor;
struct sample {
int32_t core_pct_busy;
u64 aperf;
@ -630,12 +628,10 @@ static void intel_pstate_timer_func(unsigned long __data)
{
struct cpudata *cpu = (struct cpudata *) __data;
struct sample *sample;
u64 energy;
intel_pstate_sample(cpu);
sample = &cpu->samples[cpu->sample_ptr];
rdmsrl(MSR_PKG_ENERGY_STATUS, energy);
intel_pstate_adjust_busy_pstate(cpu);
@ -644,7 +640,6 @@ static void intel_pstate_timer_func(unsigned long __data)
cpu->pstate.current_pstate,
sample->mperf,
sample->aperf,
div64_u64(energy, energy_divisor),
sample->freq);
intel_pstate_set_sample_time(cpu);
@ -926,7 +921,6 @@ static int __init intel_pstate_init(void)
int cpu, rc = 0;
const struct x86_cpu_id *id;
struct cpu_defaults *cpu_info;
u64 units;
if (no_load)
return -ENODEV;
@ -960,9 +954,6 @@ static int __init intel_pstate_init(void)
if (rc)
goto out;
rdmsrl(MSR_RAPL_POWER_UNIT, units);
energy_divisor = 1 << ((units >> 8) & 0x1f); /* bits{12:8} */
intel_pstate_debug_expose_params();
intel_pstate_sysfs_expose_params();

7
include/trace/events/power.h
View File

@ -42,7 +42,6 @@ TRACE_EVENT(pstate_sample,
u32 state,
u64 mperf,
u64 aperf,
u32 energy,
u32 freq
),
@ -51,7 +50,6 @@ TRACE_EVENT(pstate_sample,
state,
mperf,
aperf,
energy,
freq
),
@ -61,7 +59,6 @@ TRACE_EVENT(pstate_sample,
__field(u32, state)
__field(u64, mperf)
__field(u64, aperf)
__field(u32, energy)
__field(u32, freq)
),
@ -72,17 +69,15 @@ TRACE_EVENT(pstate_sample,
__entry->state = state;
__entry->mperf = mperf;
__entry->aperf = aperf;
__entry->energy = energy;
__entry->freq = freq;
),
TP_printk("core_busy=%lu scaled=%lu state=%lu mperf=%llu aperf=%llu energy=%lu freq=%lu ",
TP_printk("core_busy=%lu scaled=%lu state=%lu mperf=%llu aperf=%llu freq=%lu ",
(unsigned long)__entry->core_busy,
(unsigned long)__entry->scaled_busy,
(unsigned long)__entry->state,
(unsigned long long)__entry->mperf,
(unsigned long long)__entry->aperf,
(unsigned long)__entry->energy,
(unsigned long)__entry->freq
)