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From: Peter Zijlstra <peterz@infradead.org>
To: mingo@kernel.org, linux-kernel@vger.kernel.org
Cc: subhra.mazumdar@oracle.com, steven.sistare@oracle.com,
	dhaval.giani@oracle.com, rohit.k.jain@oracle.com,
	umgwanakikbuti@gmail.com, matt@codeblueprint.co.uk,
	riel@surriel.com, peterz@infradead.org
Subject: [RFC 09/11] sched/fair: Remove SIS_AVG_PROP
Date: Wed, 30 May 2018 16:22:45 +0200	[thread overview]
Message-ID: <20180530143106.344490819@infradead.org> (raw)
In-Reply-To: <20180530142236.667774973@infradead.org>

[-- Attachment #1: peterz-sis-again-9.patch --]
[-- Type: text/plain, Size: 871 bytes --]

Hasn't been used in forever and doesn't give nice numbers anyway.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 kernel/sched/fair.c     |    3 ---
 kernel/sched/features.h |    1 -
 2 files changed, 4 deletions(-)

--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6465,9 +6465,6 @@ static int select_idle_cpu(struct task_s
 	}
 	avg_cost = this_sd->avg_scan_cost + 1;
 
-	if (sched_feat(SIS_AVG_CPU) && avg_idle < avg_cost)
-		return -1;
-
 	if (sched_feat(SIS_PROP)) {
 		u64 span_avg = sd->span_weight * avg_idle;
 		if (span_avg > sis_min_cores * avg_cost)
--- a/kernel/sched/features.h
+++ b/kernel/sched/features.h
@@ -55,7 +55,6 @@ SCHED_FEAT(TTWU_QUEUE, true)
 /*
  * When doing wakeups, attempt to limit superfluous scans of the LLC domain.
  */
-SCHED_FEAT(SIS_AVG_CPU, false)
 SCHED_FEAT(SIS_PROP, true)
 
 SCHED_FEAT(SIS_AGE, true)

  parent reply	other threads:[~2018-05-30 14:39 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-30 14:22 [RFC 00/11] select_idle_sibling rework Peter Zijlstra
2018-05-30 14:22 ` [RFC 01/11] sched/fair: Fix select_idle_cpu()s cost accounting Peter Zijlstra
2018-05-30 14:22 ` [RFC 02/11] sched/fair: Age the average idle time Peter Zijlstra
2018-05-30 14:22 ` [RFC 03/11] sched/fair: Only use time once Peter Zijlstra
2018-05-30 14:22 ` [RFC 04/11] sched/topology: Introduce sched_domain_cores() Peter Zijlstra
2018-05-30 14:22 ` [RFC 05/11] sched/fair: Re-arrange select_idle_cpu() Peter Zijlstra
2018-05-30 14:22 ` [RFC 06/11] sched/fair: Make select_idle_cpu() proportional to cores Peter Zijlstra
2018-05-30 14:22 ` [RFC 07/11] sched/fair: Fold the select_idle_sibling() scans Peter Zijlstra
2018-05-30 14:22 ` [RFC 08/11] sched/fair: Optimize SIS_FOLD Peter Zijlstra
2018-05-30 14:22 ` Peter Zijlstra [this message]
2018-05-30 14:22 ` [RFC 10/11] sched/fair: Remove SIS_AGE/SIS_ONCE Peter Zijlstra
2018-05-30 14:22 ` [RFC 11/11] sched/fair: Remove SIS_FOLD Peter Zijlstra
2018-06-19 22:06 ` [RFC 00/11] select_idle_sibling rework Matt Fleming
2018-06-20 22:20   ` Steven Sistare

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