By: David Hess (davidwhess.delete@this.gmail.com), September 13, 2021 1:00 pm
Room: Moderated Discussions
Daniel B (fejenagy.delete@this.gmail.com) on September 13, 2021 5:20 am wrote:
>
> Either the scheduler needs to learn the application behaviour
> or the application should come tagged, but then the ISV is expected to understand hardware and system energy
> efficiency, which they don't.
Is there any reason not to expect applications to lie? Of course every thread needs to operate on the fastest available core. Ask them.
Alternatively why would developers spend time to distinguish which threads should operate on which cores when the result can only make the perceived performance worse? And why risk getting it wrong?
>
> Either the scheduler needs to learn the application behaviour
> or the application should come tagged, but then the ISV is expected to understand hardware and system energy
> efficiency, which they don't.
Is there any reason not to expect applications to lie? Of course every thread needs to operate on the fastest available core. Ask them.
Alternatively why would developers spend time to distinguish which threads should operate on which cores when the result can only make the perceived performance worse? And why risk getting it wrong?
| Topic | Posted By | Date |
|---|---|---|
| alder lake. | inteluser | 2021/09/10 02:52 AM |
| alder lake. | Andrei F | 2021/09/10 10:31 AM |
| alder lake. | Andrey | 2021/09/10 10:38 AM |
| alder lake. | rwessel | 2021/09/10 12:18 PM |
| alder lake. | Andrei F | 2021/09/10 01:49 PM |
| alder lake. | Andrey | 2021/09/10 05:12 PM |
| alder lake. | David Hess | 2021/09/10 08:39 PM |
| alder lake. | Andrey | 2021/09/11 01:28 AM |
| alder lake. | --- | 2021/09/10 06:24 PM |
| alder lake. | Andrei F | 2021/09/12 02:09 AM |
| DVFS | David Kanter | 2021/09/12 10:58 PM |
| DVFS | Andrei F | 2021/09/13 02:02 AM |
| DVFS | Anon | 2021/09/13 04:28 AM |
| DVFS | Jukka Larja | 2021/09/13 06:35 AM |
| DVFS | Andrei F | 2021/09/14 01:07 AM |
| DVFS | Jukka Larja | 2021/09/14 05:11 AM |
| DVFS | Andrei F | 2021/09/14 08:55 AM |
| DVFS | Jukka Larja | 2021/09/14 11:23 AM |
| DVFS | --- | 2021/09/13 11:19 AM |
| DVFS | Doug S | 2021/09/13 11:57 AM |
| DVFS | David Hess | 2021/09/13 12:32 PM |
| DVFS | --- | 2021/09/13 02:06 PM |
| DVFS | David Hess | 2021/09/13 03:21 PM |
| DVFS | David Kanter | 2021/09/15 04:05 PM |
| DVFS | David Hess | 2021/09/13 12:46 PM |
| DVFS | Jukka Larja | 2021/09/14 05:35 AM |
| Quick shutdown? | David Kanter | 2021/09/15 11:46 AM |
| Quick shutdown? | Andrei F | 2021/09/16 08:12 AM |
| Quick shutdown? | David Kanter | 2021/09/16 12:04 PM |
| Quick shutdown? | Andrei F | 2021/09/17 02:35 AM |
| Quick shutdown? | Andrei F | 2021/09/17 02:38 AM |
| and weren't 'they' right? | Daniel B | 2021/09/13 05:20 AM |
| and weren't 'they' right? | Andrei F | 2021/09/13 05:51 AM |
| and weren't 'they' right? | Daniel B | 2021/09/13 07:29 AM |
| and weren't 'they' right? | anon | 2021/09/13 06:07 AM |
| and weren't 'they' right? | Jukka Larja | 2021/09/13 06:26 AM |
| and weren't 'they' right? | anon | 2021/09/14 12:37 AM |
| Alder Lake has no little cores | Heikki Kultala | 2021/09/13 07:33 AM |
| Alder Lake has no little cores | Michael S | 2021/09/13 08:33 AM |
| Alder Lake has no little cores | me | 2021/09/13 11:45 AM |
| Alder Lake has no little cores | Heikki Kultala | 2021/09/13 02:49 PM |
| Alder Lake has no little cores | anon | 2021/09/14 12:42 AM |
| why stop at two core sizes? | hobold | 2021/09/14 06:47 AM |
| Memory caches did this, right? | Mark Roulo | 2021/09/14 03:51 PM |
| Memory caches did this, right? | Brett | 2021/09/14 08:17 PM |
| Memory caches did this, right? | Kevin G | 2021/09/16 04:10 PM |
| Large reorder buffers (L1+L2) | ⚛ | 2021/09/15 12:24 PM |
| Large reorder buffers (L1+L2) | hobold | 2021/09/15 01:06 PM |
| Alder Lake has no little cores | Adrian | 2021/09/14 09:33 AM |
| and weren't 'they' right? | David Hess | 2021/09/13 01:00 PM |
| Battery vs Performance | Mark Roulo | 2021/09/13 01:18 PM |
| Battery vs Performance | Doug S | 2021/09/13 03:05 PM |
| Battery vs Performance | David Hess | 2021/09/13 03:28 PM |
| Battery vs Performance | --- | 2021/09/13 06:08 PM |
| Battery vs Performance | --- | 2021/09/13 06:08 PM |
| Battery vs Performance | Doug S | 2021/09/13 09:53 PM |
| Battery vs Performance | Anon | 2021/09/14 07:42 AM |
| and weren't 'they' right? | Daniel B | 2021/09/13 01:57 PM |
| and weren't 'they' right? | David Hess | 2021/09/13 03:11 PM |
| and weren't 'they' right? | --- | 2021/09/13 03:38 PM |
| and weren't 'they' right? | --- | 2021/09/13 03:32 PM |
| and weren't 'they' right? | Brendan | 2021/09/14 04:30 AM |
| and weren't 'they' right? | Jukka Larja | 2021/09/14 05:31 AM |
| and weren't 'they' right? | Etienne Lorrain | 2021/09/14 01:29 AM |
