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cpuidle: Split cpuidle_state structure and move per-cpu statistics fields

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This is the first step towards global registration of cpuidle
states. The statistics used primarily by the governor are per-cpu
and have to be split from rest of the fields inside cpuidle_state,
which would be made global i.e. single copy. The driver_data field
is also per-cpu and moved.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Tested-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Deepthi Dharwar
2011-10-28 16:20:33 +05:30
committed by Len Brown
parent b25edc42bf
commit 4202735e8a
7 changed files with 90 additions and 54 deletions
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drivers/cpuidle/cpuidle.c
+6 -5
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@@ -105,9 +105,9 @@ int cpuidle_idle_call(void)
/* This can be moved to within driver enter routine
* but that results in multiple copies of same code.
*/
dev->states[entered_state].time +=
dev->states_usage[entered_state].time +=
(unsigned long long)dev->last_residency;
dev->states[entered_state].usage++;
dev->states_usage[entered_state].usage++;
}
/* give the governor an opportunity to reflect on the outcome */
@@ -186,8 +186,9 @@ static int poll_idle(struct cpuidle_device *dev, int index)
static void poll_idle_init(struct cpuidle_device *dev)
{
struct cpuidle_state *state = &dev->states[0];
struct cpuidle_state_usage *state_usage = &dev->states_usage[0];
cpuidle_set_statedata(state, NULL);
cpuidle_set_statedata(state_usage, NULL);
snprintf(state->name, CPUIDLE_NAME_LEN, "POLL");
snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE");
@@ -235,8 +236,8 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
goto fail_sysfs;
for (i = 0; i < dev->state_count; i++) {
dev->states[i].usage = 0;
dev->states[i].time = 0;
dev->states_usage[i].usage = 0;
dev->states_usage[i].time = 0;
}
dev->last_residency = 0;