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Groups > linux.kernel > #1657587 > unrolled thread
| Started by | Matt Fleming <matt@codeblueprint.co.uk> |
|---|---|
| First post | 2017-06-05 15:10 +0200 |
| Last post | 2017-06-06 11:30 +0200 |
| Articles | 2 — 2 participants |
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Re: hackbench vs select_idle_sibling; was: [tip:sched/core] sched/fair, cpumask: Export for_each_cpu_wrap() Matt Fleming <matt@codeblueprint.co.uk> - 2017-06-05 15:10 +0200
Re: hackbench vs select_idle_sibling; was: [tip:sched/core] sched/fair, cpumask: Export for_each_cpu_wrap() Peter Zijlstra <peterz@infradead.org> - 2017-06-06 11:30 +0200
| From | Matt Fleming <matt@codeblueprint.co.uk> |
|---|---|
| Date | 2017-06-05 15:10 +0200 |
| Subject | Re: hackbench vs select_idle_sibling; was: [tip:sched/core] sched/fair, cpumask: Export for_each_cpu_wrap() |
| Message-ID | <tOZVE-3jm-33@gated-at.bofh.it> |
On Fri, 19 May, at 04:00:35PM, Matt Fleming wrote: > On Wed, 17 May, at 12:53:50PM, Peter Zijlstra wrote: > > > > Please test.. > > Results are still coming in but things do look better with your patch > applied. > > It does look like there's a regression when running hackbench in > process mode and when the CPUs are not fully utilised, e.g. check this > out: This turned out to be a false positive; your patch improves things as far as I can see.
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| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Date | 2017-06-06 11:30 +0200 |
| Message-ID | <tPiYi-6PD-21@gated-at.bofh.it> |
| In reply to | #1657587 |
On Mon, Jun 05, 2017 at 02:00:21PM +0100, Matt Fleming wrote: > On Fri, 19 May, at 04:00:35PM, Matt Fleming wrote: > > On Wed, 17 May, at 12:53:50PM, Peter Zijlstra wrote: > > > > > > Please test.. > > > > Results are still coming in but things do look better with your patch > > applied. > > > > It does look like there's a regression when running hackbench in > > process mode and when the CPUs are not fully utilised, e.g. check this > > out: > > This turned out to be a false positive; your patch improves things as > far as I can see. Hooray, I'll move it to a part of the queue intended for merging. Thanks!
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