Total number of times the hardware has been asked by the given CPU to
enter this idle state.
+``rejected``
+ Total number of times a request to enter this idle state on the given
+ CPU was rejected.
+
The :file:`desc` and :file:`name` files both contain strings. The difference
between them is that the name is expected to be more concise, while the
description may be longer and it may contain white space or special characters.
much time has been spent by the hardware in different idle states supported by
it is to use idle state residency counters in the hardware, if available.
+Generally, an interrupt received when trying to enter an idle state causes the
+idle state entry request to be rejected, in which case the ``CPUIdle`` driver
+may return an error code to indicate that this was the case. The :file:`usage`
+and :file:`rejected` files report the number of times the given idle state
+was entered successfully or rejected, respectively.
.. _cpu-pm-qos:
}
} else {
dev->last_residency_ns = 0;
+ dev->states_usage[index].rejected++;
}
return entered_state;
define_show_state_time_function(target_residency)
define_show_state_function(power_usage)
define_show_state_ull_function(usage)
+define_show_state_ull_function(rejected)
define_show_state_str_function(name)
define_show_state_str_function(desc)
define_show_state_ull_function(above)
define_one_state_ro(residency, show_state_target_residency);
define_one_state_ro(power, show_state_power_usage);
define_one_state_ro(usage, show_state_usage);
+define_one_state_ro(rejected, show_state_rejected);
define_one_state_ro(time, show_state_time);
define_one_state_rw(disable, show_state_disable, store_state_disable);
define_one_state_ro(above, show_state_above);
&attr_residency.attr,
&attr_power.attr,
&attr_usage.attr,
+ &attr_rejected.attr,
&attr_time.attr,
&attr_disable.attr,
&attr_above.attr,
u64 time_ns;
unsigned long long above; /* Number of times it's been too deep */
unsigned long long below; /* Number of times it's been too shallow */
+ unsigned long long rejected; /* Number of times idle entry was rejected */
#ifdef CONFIG_SUSPEND
unsigned long long s2idle_usage;
unsigned long long s2idle_time; /* in US */