From: Peter Zijlstra <peterz@infradead.org>
To: Gabriele Monaco <gmonaco@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Clark Williams <williams@redhat.com>,
arighi@nvidia.com
Subject: Re: [RFC PATCH] sched/deadline: Avoid dl_server boosting with expired deadline
Date: Fri, 31 Oct 2025 16:44:55 +0100 [thread overview]
Message-ID: <20251031154455.GU3245006@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <2daa2e6217eeaa239616303626c0d73d808ae947.camel@redhat.com>
On Fri, Oct 31, 2025 at 04:41:22PM +0100, Gabriele Monaco wrote:
> > Humm, let me noodle a bit more on this. Also, I should see if I can get
> > graphviz to draw ascii art state diagrams :-)
>
> Dot doesn't do it but graph-easy does reasonably well.
yep, just found that. Seems to work well:
+----------------------+
| A:init | <+
+----------------------+ |
| |
| 1:dl_server_start | 4:pick_task_dl
v |
2:update_curr_dl_se +----------------------+ |
+---------------------- | | |
| | B:zero_laxity-wait | |
+---------------------> | | <+------------------+
+----------------------+ | |
| | |
| 3:dl_server_timer | |
v | |
+----------------------+ | |
+---------------------> | C:running | -+ | 2:update_curr_dl_se
| +----------------------+ |
| | |
| 6:dl_server_timer | 5:update_curr_dl_se |
| v |
| +----------------------+ |
+---------------------- | D:replenish | --------------------+
+----------------------+
Anyway, back to noodling on how to make it stop on idle :-)
next prev parent reply other threads:[~2025-10-31 15:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-07 12:29 Gabriele Monaco
2025-10-14 9:30 ` Gabriele Monaco
2025-10-14 9:54 ` Peter Zijlstra
2025-10-14 10:05 ` Gabriele Monaco
2025-10-14 10:25 ` Peter Zijlstra
2025-10-14 15:32 ` Gabriele Monaco
2025-10-14 16:01 ` Juri Lelli
2025-10-14 19:33 ` Peter Zijlstra
2025-10-15 5:40 ` Juri Lelli
2025-10-20 14:11 ` Peter Zijlstra
2025-10-22 10:11 ` Gabriele Monaco
2025-10-30 18:42 ` Peter Zijlstra
2025-10-31 13:05 ` Peter Zijlstra
2025-10-31 13:24 ` Gabriele Monaco
2025-10-31 15:20 ` Peter Zijlstra
2025-10-31 15:41 ` Gabriele Monaco
2025-10-31 15:44 ` Peter Zijlstra [this message]
2025-10-31 15:51 ` Gabriele Monaco
2025-11-01 0:00 ` Peter Zijlstra
2025-11-11 9:58 ` Gabriele Monaco
2025-11-11 11:17 ` Peter Zijlstra
2025-11-11 11:24 ` Peter Zijlstra
2025-11-11 11:37 ` [tip: sched/core] sched/deadline: Fix dl_server stop condition tip-bot2 for Peter Zijlstra
2025-11-01 0:08 ` [RFC PATCH] sched/deadline: Avoid dl_server boosting with expired deadline Peter Zijlstra
2025-11-01 8:43 ` Gabriele Monaco
2025-11-11 11:37 ` [tip: sched/core] sched/deadline: Fix dl_server time accounting tip-bot2 for Peter Zijlstra
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