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From: Yuri Andriaccio <yurand2000@gmail.com>
To: "Ingo Molnar" <mingo@redhat.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Juri Lelli" <juri.lelli@redhat.com>,
	"Vincent Guittot" <vincent.guittot@linaro.org>,
	"Dietmar Eggemann" <dietmar.eggemann@arm.com>,
	"Steven Rostedt" <rostedt@goodmis.org>,
	"Ben Segall" <bsegall@google.com>, "Mel Gorman" <mgorman@suse.de>,
	"Valentin Schneider" <vschneid@redhat.com>,
	"Tejun Heo" <tj@kernel.org>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Michal Koutný" <mkoutny@suse.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	Luca Abeni <luca.abeni@santannapisa.it>,
	Yuri Andriaccio <yuri.andriaccio@santannapisa.it>
Subject: [RFC PATCH v6 02/25] sched/rt: Update default bandwidth for real-time tasks to ONE
Date: Mon,  8 Jun 2026 14:15:21 +0200	[thread overview]
Message-ID: <20260608121546.69910-3-yurand2000@gmail.com> (raw)
In-Reply-To: <20260608121546.69910-1-yurand2000@gmail.com>

Set the default total bandwidth for SCHED_DEADLINE tasks and servers to ONE.
  FIFO/RR tasks are already throttled by fair-servers and ext-servers, and
  the sysctl_sched_rt_runtime parameter now only defines the total bw that
  is allowed to deadline entities.

---

Already merged in sched/tip:
https://git.kernel.org/tip/c2e390197ad1360db6686a8c89abaafaf83adf72

Signed-off-by: Yuri Andriaccio <yurand2000@gmail.com>
---
 kernel/sched/rt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 4ee8faf01441..e6ea728f519e 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -19,9 +19,9 @@ int sysctl_sched_rt_period = 1000000;

 /*
  * part of the period that we allow rt tasks to run in us.
- * default: 0.95s
+ * default: 1s
  */
-int sysctl_sched_rt_runtime = 950000;
+int sysctl_sched_rt_runtime = 1000000;

 #ifdef CONFIG_SYSCTL
 static int sysctl_sched_rr_timeslice = (MSEC_PER_SEC * RR_TIMESLICE) / HZ;
--
2.54.0


  parent reply	other threads:[~2026-06-08 12:15 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-08 12:15 [RFC PATCH v6 00/25] Hierarchical Constant Bandwidth Server Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 01/25] sched/deadline: Fix replenishment logic for non-deferred servers Yuri Andriaccio
2026-06-08 12:15 ` Yuri Andriaccio [this message]
2026-06-08 12:15 ` [RFC PATCH v6 03/25] sched/deadline: Do not access dl_se->rq directly Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 04/25] sched/deadline: Distinguish between dl_rq and my_q Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 05/25] sched/rt: Pass an rt_rq instead of an rq where needed Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 06/25] sched/rt: Move functions from rt.c to sched.h Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 07/25] sched/rt: Disable RT_GROUP_SCHED Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 08/25] sched/rt: Remove unnecessary runqueue pointer in struct rt_rq Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 09/25] sched/rt: Introduce HCBS specific structs in task_group Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 10/25] sched/core: Initialize HCBS specific structures Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 11/25] sched/deadline: Add dl_init_tg Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 12/25] sched/rt: Add {alloc/unregister/free}_rt_sched_group Yuri Andriaccio
2026-06-11  8:42   ` Juri Lelli
2026-06-08 12:15 ` [RFC PATCH v6 13/25] sched/deadline: Account rt-cgroups bandwidth in deadline tasks schedulability tests Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 14/25] sched/rt: Implement dl-server operations for rt-cgroups Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 15/25] sched/rt: Update task event callbacks for HCBS scheduling Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 16/25] sched/rt: Remove support for cgroups-v1 Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 17/25] sched/rt: Update rt-cgroup schedulability checks Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 18/25] sched/rt: Update task's RT runqueue when switching scheduling class Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 19/25] sched/rt: Remove old RT_GROUP_SCHED data structures Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 20/25] sched/rt: Add HCBS migration code to related functions Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 21/25] sched/rt: Hook HCBS migration functions Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 22/25] sched/core: Execute enqueued balance callbacks when changing allowed CPUs Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 23/25] sched/rt: Try pull task on empty server pick Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 24/25] sched/core: Execute enqueued balance callbacks after migrate_disable_switch Yuri Andriaccio
2026-06-08 12:15 ` [RFC PATCH v6 25/25] Documentation: Update documentation for real-time cgroups Yuri Andriaccio
2026-06-09 15:46 ` [RFC PATCH v6 00/25] Hierarchical Constant Bandwidth Server Juri Lelli
2026-06-09 16:23   ` Yuri Andriaccio
2026-06-10  9:21     ` Juri Lelli
2026-06-15 20:38 ` Tejun Heo

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