Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi PeterZ, I just got this in my inbox and noticed I didn't adress it to anyone. I meant to address it to you. On Fri, Sep 29 2017 at 17:05, Brendan Jackman wrote: > There has been a bit of discussion on this RFC, but before I do any > more work I'd really like your input on the basic idea. > >

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi PeterZ, I just got this in my inbox and noticed I didn't adress it to anyone. I meant to address it to you. On Fri, Sep 29 2017 at 17:05, Brendan Jackman wrote: > There has been a bit of discussion on this RFC, but before I do any > more work I'd really like your input on the basic idea. > >

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

There has been a bit of discussion on this RFC, but before I do any more work I'd really like your input on the basic idea. Does the approach of feeding outside info like wake_q length into the scheduler's decisions seem basically acceptable? Cheers, Brendan On Fri, Aug 11 2017 at 09:45,

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

There has been a bit of discussion on this RFC, but before I do any more work I'd really like your input on the basic idea. Does the approach of feeding outside info like wake_q length into the scheduler's decisions seem basically acceptable? Cheers, Brendan On Fri, Aug 11 2017 at 09:45,

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 09/21/2017 12:50 AM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:17 PM, Atish Patra wrote: On 09/20/2017 03:23 PM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: On Wed, Sep 20 2017 at 05:06, Joel

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 09/21/2017 12:50 AM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:17 PM, Atish Patra wrote: On 09/20/2017 03:23 PM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: On Tue, Sep 19, 2017 at 3:05 AM,

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20, 2017 at 2:17 PM, Atish Patra wrote: > On 09/20/2017 03:23 PM, Joel Fernandes wrote: >> >> On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman >> wrote: >>> >>> >>> On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: > > On

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20, 2017 at 2:17 PM, Atish Patra wrote: > On 09/20/2017 03:23 PM, Joel Fernandes wrote: >> >> On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman >> wrote: >>> >>> >>> On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: > > On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman >

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 09/20/2017 03:23 PM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman wrote: On Mon, Sep 18 2017 at 22:15,

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 09/20/2017 03:23 PM, Joel Fernandes wrote: On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman wrote: On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: [..] IIUC, if

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: > > On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: >>> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman >>> wrote: On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: >> [..]

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20, 2017 at 2:33 AM, Brendan Jackman wrote: > > On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: >>> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman >>> wrote: On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: >> [..] >> IIUC, if wake_affine() behaves correctly this

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 08/11/2017 04:45 AM, Brendan Jackman wrote: This patch adds a parameter to select_task_rq, sibling_count_hint allowing the caller, where it has this information, to inform the sched_class the number of tasks that are being woken up as part of the same event. The wake_q mechanism is one case

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On 08/11/2017 04:45 AM, Brendan Jackman wrote: This patch adds a parameter to select_task_rq, sibling_count_hint allowing the caller, where it has this information, to inform the sched_class the number of tasks that are being woken up as part of the same event. The wake_q mechanism is one case

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi Joel, Sorry I didn't see your comments on the code before, I think it's orthoganal to the other thread about the overall design so I'll just respond here. On Tue, Sep 19 2017 at 05:15, Joel Fernandes wrote: > Hi Brendan, > > On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman [snip] >> >> diff

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi Joel, Sorry I didn't see your comments on the code before, I think it's orthoganal to the other thread about the overall design so I'll just respond here. On Tue, Sep 19 2017 at 05:15, Joel Fernandes wrote: > Hi Brendan, > > On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman [snip] >> >> diff

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: >> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman >> wrote: >>> On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: > [..] > IIUC, if wake_affine() behaves correctly this trick wouldn't be > necessary on SMP

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Wed, Sep 20 2017 at 05:06, Joel Fernandes wrote: >> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman >> wrote: >>> On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: > [..] > IIUC, if wake_affine() behaves correctly this trick wouldn't be > necessary on SMP systems, so it might be

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman > wrote: >> On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: [..] IIUC, if wake_affine() behaves correctly this trick wouldn't be necessary on SMP systems, so it might be best guarded by the presence >>> >>>

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

> On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman > wrote: >> On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: [..] IIUC, if wake_affine() behaves correctly this trick wouldn't be necessary on SMP systems, so it might be best guarded by the presence >>> >>> Actually wake_affine

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman wrote: > On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: >> Hi Brendan, > Hi Joel, > > Thanks for taking a look :) > >> On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman >> wrote: >>> This patch

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Tue, Sep 19, 2017 at 3:05 AM, Brendan Jackman wrote: > On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: >> Hi Brendan, > Hi Joel, > > Thanks for taking a look :) > >> On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman >> wrote: >>> This patch adds a parameter to select_task_rq,

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: > Hi Brendan, Hi Joel, Thanks for taking a look :) > On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman > wrote: >> This patch adds a parameter to select_task_rq, sibling_count_hint >> allowing the caller, where it has

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

On Mon, Sep 18 2017 at 22:15, Joel Fernandes wrote: > Hi Brendan, Hi Joel, Thanks for taking a look :) > On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman > wrote: >> This patch adds a parameter to select_task_rq, sibling_count_hint >> allowing the caller, where it has this information, to

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi Brendan, On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman wrote: > This patch adds a parameter to select_task_rq, sibling_count_hint > allowing the caller, where it has this information, to inform the > sched_class the number of tasks that are being woken up as part

Re: [RFC] sched/fair: Use wake_q length as a hint for wake_wide

Hi Brendan, On Fri, Aug 11, 2017 at 2:45 AM, Brendan Jackman wrote: > This patch adds a parameter to select_task_rq, sibling_count_hint > allowing the caller, where it has this information, to inform the > sched_class the number of tasks that are being woken up as part of > the same event. > >

[RFC] sched/fair: Use wake_q length as a hint for wake_wide

This patch adds a parameter to select_task_rq, sibling_count_hint allowing the caller, where it has this information, to inform the sched_class the number of tasks that are being woken up as part of the same event. The wake_q mechanism is one case where this information is available.

[RFC] sched/fair: Use wake_q length as a hint for wake_wide

This patch adds a parameter to select_task_rq, sibling_count_hint allowing the caller, where it has this information, to inform the sched_class the number of tasks that are being woken up as part of the same event. The wake_q mechanism is one case where this information is available.