On 22-Oct-18 8:40 PM, Steve Sistare wrote:
>
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify candidates. To minimize
On 11/2/2018 7:39 PM, Subhra Mazumdar wrote:
> On 10/22/18 7:59 AM, Steve Sistare wrote:
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a bitmap of overloaded CPUs to
On 11/2/2018 7:39 PM, Subhra Mazumdar wrote:
> On 10/22/18 7:59 AM, Steve Sistare wrote:
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a bitmap of overloaded CPUs to
On 10/22/18 7:59 AM, Steve Sistare wrote:
When a CPU has no more CFS tasks to run, and idle_balance() fails to
find a task, then attempt to steal a task from an overloaded CPU in the
same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
identify candidates. To minimize search
On 10/22/18 7:59 AM, Steve Sistare wrote:
When a CPU has no more CFS tasks to run, and idle_balance() fails to
find a task, then attempt to steal a task from an overloaded CPU in the
same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
identify candidates. To minimize search
On 10/22/2018 10:59 AM, Steve Sistare wrote:
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify candidates. To minimize
On 10/22/2018 10:59 AM, Steve Sistare wrote:
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify candidates. To minimize
Thanks very much to everyone who has commented on my patch series.
Here are the issues to be addressed in V2 of the series, and the person
that suggested it, or raised the issue that led to it.
Changes for V2:
* Remove stray patch 10 hunk from patch 5 (Valentin)
* Fix "warning: label out
Thanks very much to everyone who has commented on my patch series.
Here are the issues to be addressed in V2 of the series, and the person
that suggested it, or raised the issue that led to it.
Changes for V2:
* Remove stray patch 10 hunk from patch 5 (Valentin)
* Fix "warning: label out
On 10/25/2018 8:43 AM, Vincent Guittot wrote:
> On Thu, 25 Oct 2018 at 13:29, Steven Sistare
> wrote:
>>
>> On 10/25/2018 3:50 AM, Vincent Guittot wrote:
>>> Hi Steve,
>>>
>>> On Mon, 22 Oct 2018 at 17:10, Steve Sistare
>>> wrote:
When a CPU has no more CFS tasks to run, and
On 10/25/2018 8:43 AM, Vincent Guittot wrote:
> On Thu, 25 Oct 2018 at 13:29, Steven Sistare
> wrote:
>>
>> On 10/25/2018 3:50 AM, Vincent Guittot wrote:
>>> Hi Steve,
>>>
>>> On Mon, 22 Oct 2018 at 17:10, Steve Sistare
>>> wrote:
When a CPU has no more CFS tasks to run, and
On Thu, 25 Oct 2018 at 13:29, Steven Sistare wrote:
>
> On 10/25/2018 3:50 AM, Vincent Guittot wrote:
> > Hi Steve,
> >
> > On Mon, 22 Oct 2018 at 17:10, Steve Sistare
> > wrote:
> >>
> >> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> >> find a task, then attempt to
On Thu, 25 Oct 2018 at 13:29, Steven Sistare wrote:
>
> On 10/25/2018 3:50 AM, Vincent Guittot wrote:
> > Hi Steve,
> >
> > On Mon, 22 Oct 2018 at 17:10, Steve Sistare
> > wrote:
> >>
> >> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> >> find a task, then attempt to
On 10/25/2018 7:31 AM, Valentin Schneider wrote:
>
> On 24/10/2018 20:27, Steven Sistare wrote:
> [...]
>> Hi Valentin,
>>
>> Asymmetric systems could maintain a separate bitmap for misfits; set a bit
>> when a CPU goes on CPU, clear it going off. When a fast CPU goes new idle,
>> it would
On 10/25/2018 7:31 AM, Valentin Schneider wrote:
>
> On 24/10/2018 20:27, Steven Sistare wrote:
> [...]
>> Hi Valentin,
>>
>> Asymmetric systems could maintain a separate bitmap for misfits; set a bit
>> when a CPU goes on CPU, clear it going off. When a fast CPU goes new idle,
>> it would
On 24/10/2018 20:27, Steven Sistare wrote:
[...]
> Hi Valentin,
>
> Asymmetric systems could maintain a separate bitmap for misfits; set a bit
> when a CPU goes on CPU, clear it going off. When a fast CPU goes new idle,
> it would first search the misfits mask, then search cfs_overload_cpus.
On 24/10/2018 20:27, Steven Sistare wrote:
[...]
> Hi Valentin,
>
> Asymmetric systems could maintain a separate bitmap for misfits; set a bit
> when a CPU goes on CPU, clear it going off. When a fast CPU goes new idle,
> it would first search the misfits mask, then search cfs_overload_cpus.
On 10/25/2018 3:50 AM, Vincent Guittot wrote:
> Hi Steve,
>
> On Mon, 22 Oct 2018 at 17:10, Steve Sistare wrote:
>>
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a
On 10/25/2018 3:50 AM, Vincent Guittot wrote:
> Hi Steve,
>
> On Mon, 22 Oct 2018 at 17:10, Steve Sistare wrote:
>>
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a
Hi Steve,
On Mon, 22 Oct 2018 at 17:10, Steve Sistare wrote:
>
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify
Hi Steve,
On Mon, 22 Oct 2018 at 17:10, Steve Sistare wrote:
>
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify
On 10/24/2018 11:34 AM, Valentin Schneider wrote:
> Hi,
>
> On 22/10/2018 20:07, Steven Sistare wrote:
>> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> [...]
>>
>> We could delete idle_balance() and use stealing exclusively for handling
>> new idle. For each sd level, stealing would look for an
On 10/24/2018 11:34 AM, Valentin Schneider wrote:
> Hi,
>
> On 22/10/2018 20:07, Steven Sistare wrote:
>> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> [...]
>>
>> We could delete idle_balance() and use stealing exclusively for handling
>> new idle. For each sd level, stealing would look for an
Hi,
On 22/10/2018 20:07, Steven Sistare wrote:
> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
[...]
>
> We could delete idle_balance() and use stealing exclusively for handling
> new idle. For each sd level, stealing would look for an overloaded CPU
> in the overloaded bitmap(s) that overlap
Hi,
On 22/10/2018 20:07, Steven Sistare wrote:
> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
[...]
>
> We could delete idle_balance() and use stealing exclusively for handling
> new idle. For each sd level, stealing would look for an overloaded CPU
> in the overloaded bitmap(s) that overlap
On Mon, Oct 22, 2018 at 03:07:10PM -0400, Steven Sistare wrote:
> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> > On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
> >> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> >> find a task, then attempt to steal a task
On Mon, Oct 22, 2018 at 03:07:10PM -0400, Steven Sistare wrote:
> On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> > On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
> >> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> >> find a task, then attempt to steal a task
On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a bitmap of
On 10/22/2018 1:04 PM, Peter Zijlstra wrote:
> On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
>> When a CPU has no more CFS tasks to run, and idle_balance() fails to
>> find a task, then attempt to steal a task from an overloaded CPU in the
>> same LLC. Maintain and use a bitmap of
On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify
On Mon, Oct 22, 2018 at 07:59:31AM -0700, Steve Sistare wrote:
> When a CPU has no more CFS tasks to run, and idle_balance() fails to
> find a task, then attempt to steal a task from an overloaded CPU in the
> same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
> identify
When a CPU has no more CFS tasks to run, and idle_balance() fails to
find a task, then attempt to steal a task from an overloaded CPU in the
same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
identify candidates. To minimize search time, steal the first migratable
task that is
When a CPU has no more CFS tasks to run, and idle_balance() fails to
find a task, then attempt to steal a task from an overloaded CPU in the
same LLC. Maintain and use a bitmap of overloaded CPUs to efficiently
identify candidates. To minimize search time, steal the first migratable
task that is
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