On 05/05/2014 08:06 PM, Denys Vlasenko wrote:
> On 04/29/2014 04:47 PM, Frederic Weisbecker wrote:
>> On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
>>> +void tick_nohz_iowait_to_idle(int cpu)
>>> +{
>>> + struct tick_sched *ts = tick_get_tick_sched(cpu);
>>> + ktime_t now =
On 05/05/2014 08:06 PM, Denys Vlasenko wrote:
On 04/29/2014 04:47 PM, Frederic Weisbecker wrote:
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
+void tick_nohz_iowait_to_idle(int cpu)
+{
+ struct tick_sched *ts = tick_get_tick_sched(cpu);
+ ktime_t now = ktime_get();
+
On 04/29/2014 06:20 PM, Frederic Weisbecker wrote:
>> index 268a45e..ffea757 100644
>> --- a/kernel/sched/core.c
>> +++ b/kernel/sched/core.c
>> @@ -4218,7 +4218,14 @@ void __sched io_schedule(void)
>> current->in_iowait = 1;
>> schedule();
>> current->in_iowait = 0;
>> +#ifdef
On 04/29/2014 04:47 PM, Frederic Weisbecker wrote:
> On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
>> +void tick_nohz_iowait_to_idle(int cpu)
>> +{
>> +struct tick_sched *ts = tick_get_tick_sched(cpu);
>> +ktime_t now = ktime_get();
>> +
>> +
On 04/29/2014 04:47 PM, Frederic Weisbecker wrote:
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
+void tick_nohz_iowait_to_idle(int cpu)
+{
+struct tick_sched *ts = tick_get_tick_sched(cpu);
+ktime_t now = ktime_get();
+
+
On 04/29/2014 06:20 PM, Frederic Weisbecker wrote:
index 268a45e..ffea757 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4218,7 +4218,14 @@ void __sched io_schedule(void)
current-in_iowait = 1;
schedule();
current-in_iowait = 0;
+#ifdef CONFIG_NO_HZ_COMMON
+
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
> Before this change, if last IO-blocked task wakes up
> on a different CPU, the original CPU may stay idle for much longer,
> and the entire time it stays idle is accounted as iowait time.
>
> This change adds struct
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
> Before this change, if last IO-blocked task wakes up
> on a different CPU, the original CPU may stay idle for much longer,
> and the entire time it stays idle is accounted as iowait time.
>
> This change adds struct
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
Before this change, if last IO-blocked task wakes up
on a different CPU, the original CPU may stay idle for much longer,
and the entire time it stays idle is accounted as iowait time.
This change adds struct
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
Before this change, if last IO-blocked task wakes up
on a different CPU, the original CPU may stay idle for much longer,
and the entire time it stays idle is accounted as iowait time.
This change adds struct
On 04/24/2014 09:18 PM, Peter Zijlstra wrote:
> On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
>> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
>> index 268a45e..ffea757 100644
>> --- a/kernel/sched/core.c
>> +++ b/kernel/sched/core.c
>> @@ -4218,7 +4218,14 @@ void
On 04/24/2014 09:18 PM, Peter Zijlstra wrote:
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 268a45e..ffea757 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4218,7 +4218,14 @@ void __sched
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 268a45e..ffea757 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -4218,7 +4218,14 @@ void __sched io_schedule(void)
> current->in_iowait = 1;
>
Before this change, if last IO-blocked task wakes up
on a different CPU, the original CPU may stay idle for much longer,
and the entire time it stays idle is accounted as iowait time.
This change adds struct tick_sched::iowait_exittime member.
On entry to idle, it is set to KTIME_MAX.
Last
Before this change, if last IO-blocked task wakes up
on a different CPU, the original CPU may stay idle for much longer,
and the entire time it stays idle is accounted as iowait time.
This change adds struct tick_sched::iowait_exittime member.
On entry to idle, it is set to KTIME_MAX.
Last
On Thu, Apr 24, 2014 at 08:45:58PM +0200, Denys Vlasenko wrote:
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 268a45e..ffea757 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4218,7 +4218,14 @@ void __sched io_schedule(void)
current-in_iowait = 1;
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