From: Steven Rostedt <rostedt@goodmis.org>
To: David Laight <David.Laight@ACULAB.COM>,
'Youssef Esmat' <youssefesmat@chromium.org>,
Vincent Guittot <vincent.guittot@linaro.org>
Cc: "mingo@redhat.com" <mingo@redhat.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"juri.lelli@redhat.com" <juri.lelli@redhat.com>,
"dietmar.eggemann@arm.com" <dietmar.eggemann@arm.com>,
"bsegall@google.com" <bsegall@google.com>,
"mgorman@suse.de" <mgorman@suse.de>,
"bristot@redhat.com" <bristot@redhat.com>,
"vschneid@redhat.com" <vschneid@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"parth@linux.ibm.com" <parth@linux.ibm.com>,
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"chris.hyser@oracle.com" <chris.hyser@oracle.com>,
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"tim.c.chen@linux.intel.com" <tim.c.chen@linux.intel.com>,
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"timj@gnu.org" <timj@gnu.org>,
"joel@joelfernandes.org" <joel@joelfernandes.org>
Subject: RE: [PATCH v5 7/7] sched/fair: Add latency list
Date: Sat, 08 Oct 2022 17:59:13 -0400 [thread overview]
Message-ID: <257E96C2-6ABD-4DD6-9B7F-771DA3D1BAAA@goodmis.org> (raw)
In-Reply-To: <39d4ea27cfce4b7d977605f37f6da6fb@AcuMS.aculab.com>
On October 8, 2022 5:14:54 PM EDT, David Laight <David.Laight@ACULAB.COM> wrote:
>...
>> Have we considered an approach where the task that is marked as
>> latency sensitive gets a boosted nice value when it sleeps and is
>> either scaled down exponentially as it runs, or immediately reset to
>> its default when it runs for one tick?
>
>Or use the RT scheduler for anything that requires low latency.
>Isn't that what it is for?
>
The RT scheduler is for tasks that require strick scheduling requirements over all else, including performance.
But we are seeing latency issues for tasks that don't have such requirements but this latency effects its quality.
-- Steve
--
Sent from my Android device with K-9 Mail. Please excuse my brevity and top posting.
next prev parent reply other threads:[~2022-10-09 6:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-25 14:39 [PATCH v5 0/7] Add latency priority for CFS class Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 1/7] sched: Introduce latency-nice as a per-task attribute Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 2/7] sched/core: Propagate parent task's latency requirements to the child task Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 3/7] sched: Allow sched_{get,set}attr to change latency_nice of the task Vincent Guittot
2022-10-12 15:07 ` K Prateek Nayak
2022-10-12 15:44 ` Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 4/7] sched/fair: Take into account latency priority at wakeup Vincent Guittot
2022-10-22 15:08 ` Chen Yu
2022-10-24 22:36 ` Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 5/7] sched/fair: Add sched group latency support Vincent Guittot
2022-10-12 14:22 ` Qais Yousef
2022-10-12 15:42 ` Vincent Guittot
2022-10-12 16:07 ` Qais Yousef
2022-09-25 14:39 ` [PATCH v5 6/7] sched/core: Support latency priority with sched core Vincent Guittot
2022-09-25 14:39 ` [PATCH v5 7/7] sched/fair: Add latency list Vincent Guittot
2022-10-08 1:04 ` Youssef Esmat
2022-10-08 21:14 ` David Laight
2022-10-08 21:59 ` Steven Rostedt [this message]
2022-10-11 17:10 ` Vincent Guittot
2022-10-11 23:54 ` Youssef Esmat
2022-10-12 15:21 ` Vincent Guittot
2022-10-13 17:19 ` Youssef Esmat
2022-10-14 15:22 ` Vincent Guittot
2022-10-19 16:53 ` Vincent Guittot
2022-10-20 15:20 ` Vincent Guittot
2022-10-26 10:44 ` Dietmar Eggemann
2022-10-26 13:55 ` Vincent Guittot
2022-10-12 14:53 ` [PATCH v5 0/7] Add latency priority for CFS class K Prateek Nayak
2022-10-13 15:24 ` Vincent Guittot
2022-10-17 6:47 ` K Prateek Nayak
2022-10-25 6:36 ` K Prateek Nayak
2022-10-27 16:34 ` Vincent Guittot
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