From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Ankur Arora <ankur.a.arora@oracle.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm@kvack.org, x86@kernel.org, akpm@linux-foundation.org,
luto@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com,
hpa@zytor.com, mingo@redhat.com, juri.lelli@redhat.com,
vincent.guittot@linaro.org, willy@infradead.org, mgorman@suse.de,
jon.grimm@amd.com, bharata@amd.com, raghavendra.kt@amd.com,
boris.ostrovsky@oracle.com, konrad.wilk@oracle.com,
jgross@suse.com, andrew.cooper3@citrix.com,
Joel Fernandes <joel@joelfernandes.org>,
Youssef Esmat <youssefesmat@chromium.org>,
Vineeth Pillai <vineethrp@google.com>,
Suleiman Souhlal <suleiman@google.com>,
Ingo Molnar <mingo@kernel.org>,
Daniel Bristot de Oliveira <bristot@kernel.org>
Subject: Re: [POC][RFC][PATCH] sched: Extended Scheduler Time Slice
Date: Wed, 25 Oct 2023 17:34:04 +0200 [thread overview]
Message-ID: <676c08bc-3714-4824-8743-cf98b45a5ab9@rasmusvillemoes.dk> (raw)
In-Reply-To: <20231025054219.1acaa3dd@gandalf.local.home>
On 25/10/2023 11.42, Steven Rostedt wrote:
> So, bit 1 is for user space to tell the kernel "please extend me", and bit
> two is for the kernel to tell user space "OK, I extended you, but call
> sched_yield() when done".
I'm not qualified to have an opinion on this. But this sounds quite
similar to
https://lore.kernel.org/lkml/1395767870-28053-1-git-send-email-khalid.aziz@oracle.com/
.
"A thread sends the scheduler this request by setting a flag in
a memory location it has shared with the kernel. Kernel uses bytes in
the same memory location to let the thread know when its request for
amnesty from preemption has been granted. Thread should yield the
processor at the end of its critical section if it was granted amnesty
to play nice with other threads."
Rasmus
prev parent reply other threads:[~2023-10-25 15:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-25 9:42 [POC][RFC][PATCH] sched: Extended Scheduler Time Slice Steven Rostedt
2023-10-25 9:46 ` Steven Rostedt
2023-10-25 10:29 ` Peter Zijlstra
2023-10-25 12:54 ` Steven Rostedt
2023-10-25 13:55 ` Peter Zijlstra
2023-10-25 14:31 ` Steven Rostedt
2023-10-25 14:53 ` Mathieu Desnoyers
2023-10-25 15:07 ` Steven Rostedt
2023-10-25 15:42 ` Mathieu Desnoyers
2023-10-25 16:24 ` Mateusz Guzik
2023-10-25 17:17 ` Steven Rostedt
2023-10-25 18:49 ` Mathieu Desnoyers
2023-10-25 19:19 ` Steven Rostedt
2023-10-25 21:56 ` Mathieu Desnoyers
2023-10-26 8:54 ` Peter Zijlstra
2023-10-26 13:40 ` Steven Rostedt
2023-10-26 15:49 ` Steven Rostedt
2023-10-26 16:31 ` Daniel Bristot de Oliveira
2023-10-26 17:26 ` Steven Rostedt
2023-10-26 8:44 ` Peter Zijlstra
2023-10-26 13:16 ` Steven Rostedt
2023-10-30 13:29 ` Peter Zijlstra
2023-10-30 13:52 ` Steven Rostedt
2023-10-26 5:03 ` Ankur Arora
2023-10-25 15:12 ` Steven Rostedt
2023-10-25 15:34 ` Rasmus Villemoes [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=676c08bc-3714-4824-8743-cf98b45a5ab9@rasmusvillemoes.dk \
--to=linux@rasmusvillemoes.dk \
--cc=akpm@linux-foundation.org \
--cc=andrew.cooper3@citrix.com \
--cc=ankur.a.arora@oracle.com \
--cc=bharata@amd.com \
--cc=boris.ostrovsky@oracle.com \
--cc=bp@alien8.de \
--cc=bristot@kernel.org \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=joel@joelfernandes.org \
--cc=jon.grimm@amd.com \
--cc=juri.lelli@redhat.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=mgorman@suse.de \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=raghavendra.kt@amd.com \
--cc=rostedt@goodmis.org \
--cc=suleiman@google.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=vincent.guittot@linaro.org \
--cc=vineethrp@google.com \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
--cc=youssefesmat@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.