From: AdaMagica <christ-usch.grein@t-online.de>
Subject: Re: non-preemptive tasking on GNAT 2020 Windows 10 multicore AMD
Date: Sat, 12 Jun 2021 08:43:57 -0700 (PDT) [thread overview]
Message-ID: <aa8d1e4f-494e-4d8a-8c44-edfdb7f3ec04n@googlegroups.com> (raw)
In-Reply-To: <sa2bpc$it8$1@gioia.aioe.org>
RM 9.2(3/2) does not state in which order the tasks begin to run. They are activated together, then they are put in the ready queue in some order (there is not statement about the order in thr RM in the absence of prios). So I do not see that One has to run first.
Secondly, there is no priority defined, so they both have the same prio. Since there are no dispatching points as far as I can see, I do not understand why the running task should be preempted.
I had expected the task that is the first in the ready queue runs until it is done (this is a dispatching point), then the other will get the processor.
I didn't takeinto account how the pragma changes the default scheduling scheme.
next prev parent reply other threads:[~2021-06-12 15:43 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 12:51 non-preemptive tasking on GNAT 2020 Windows 10 multicore AMD Dan Winslow
2021-06-12 13:11 ` Dmitry A. Kazakov
2021-06-12 15:43 ` AdaMagica [this message]
2021-06-12 15:57 ` Dmitry A. Kazakov
2021-06-12 16:05 ` AdaMagica
2021-06-12 16:30 ` Dmitry A. Kazakov
2021-06-12 20:56 ` Dan Winslow
2021-06-12 22:21 ` Dan Winslow
2021-06-13 1:24 ` Dennis Lee Bieber
2021-06-13 1:55 ` Dennis Lee Bieber
2021-06-13 10:24 ` J-P. Rosen
2021-06-13 12:11 ` Dan Winslow
2021-06-13 6:20 ` Randy Brukardt
2021-06-13 8:04 ` darek
2021-06-13 9:13 ` Dmitry A. Kazakov
2021-06-13 21:43 ` darek
2021-06-13 12:06 ` Dan Winslow
2021-06-13 13:16 ` Jeffrey R. Carter
2021-06-13 16:43 ` Dan Winslow
2021-06-13 16:46 ` Dan Winslow
2021-06-13 16:50 ` Dan Winslow
2021-06-13 17:44 ` Jeffrey R. Carter
2021-06-15 0:41 ` Dan Winslow
2021-06-16 0:10 ` Dennis Lee Bieber
2021-06-14 2:09 ` Dennis Lee Bieber
2021-06-12 16:03 ` AdaMagica
2021-06-12 18:02 ` Niklas Holsti
2021-06-12 20:50 ` Dan Winslow
2021-06-13 17:41 ` AdaMagica
2021-06-12 17:18 ` Dan Winslow
2021-06-12 17:21 ` Dan Winslow
2021-06-12 18:06 ` Dennis Lee Bieber
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