From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: non-preemptive tasking on GNAT 2020 Windows 10 multicore AMD
Date: Sat, 12 Jun 2021 17:57:37 +0200 [thread overview]
Message-ID: <sa2lhe$ig3$1@gioia.aioe.org> (raw)
In-Reply-To: aa8d1e4f-494e-4d8a-8c44-edfdb7f3ec04n@googlegroups.com
On 2021-06-12 17:43, AdaMagica wrote:
> 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.
Because under Windows the default priority is in the time sharing class.
As the name suggests such threads are preempted when the their quant
expires. AFAIK, even a lower priority thread can preempt a higher
priority one if both are time sharing. Time sharing priority only
influences the duration of the quant and the chances to gain the processor.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2021-06-12 15:57 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
2021-06-12 15:57 ` Dmitry A. Kazakov [this message]
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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