From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Feature suggestion: different task schedules
Date: Fri, 14 Jul 2017 10:37:50 +0200
Date: 2017-07-14T10:37:50+02:00 [thread overview]
Message-ID: <ok9vsu$unj$1@gioia.aioe.org> (raw)
In-Reply-To: 1500011977.2481.9.camel@obry.net
On 14/07/2017 07:59, Pascal Obry wrote:
>> pragma Schedule=>Manual;
>>
>> the task runs only when a protected entry is called and stops at the
>> next accept statement.
>>
>> This is usually the fastest mode in the case of one-core system.
>
> I don't see the point. Call from the task the PO with a barrier. The
> task will be sleeping until waken-up by an event on this PO. Isn't this
> is exactly what you looking for?
The point, I presume, is to have co-routines. For that purpose the
object used to yield processor is not even protected. All parties are
synchronized already.
As a use-case consider a producer-consumer pair. Both would be
pseudo-tasks backed by single thread of control (proper task).
> Don't assume you have to do optimization yourself. Most of the time the
> compiler and runtime does this for you and using the most efficient
> syscall on the target.
This is not the case for co-routines where transition of control is
virtual, only there to use a task abstraction for decomposition of an
algorithm that itself is strictly non-concurrent.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2017-07-14 8:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-13 20:20 Feature suggestion: different task schedules Victor Porton
2017-07-13 21:58 ` Victor Porton
2017-07-13 22:11 ` Victor Porton
2017-07-14 5:59 ` Pascal Obry
2017-07-14 8:37 ` Dmitry A. Kazakov [this message]
2017-07-15 11:30 ` Victor Porton
2017-07-15 19:23 ` Niklas Holsti
2017-07-15 20:01 ` Simon Wright
2017-07-16 18:48 ` Jeffrey R. Carter
2017-07-16 19:05 ` Dmitry A. Kazakov
2017-07-16 20:25 ` Simon Wright
2017-07-18 0:09 ` Randy Brukardt
2017-07-18 7:14 ` Dmitry A. Kazakov
2017-07-18 15:28 ` Shark8
2017-07-18 16:06 ` Dmitry A. Kazakov
2017-07-18 20:09 ` Randy Brukardt
2017-07-19 7:24 ` Dmitry A. Kazakov
2017-07-23 12:31 ` Victor Porton
2017-07-23 14:19 ` Egil H H
2017-07-23 20:03 ` Victor Porton
2017-07-23 20:05 ` Dennis Lee Bieber
2017-07-23 18:47 ` Dmitry A. Kazakov
2017-07-24 15:26 ` Alejandro R. Mosteo
2017-07-24 19:56 ` Dmitry A. Kazakov
-- strict thread matches above, loose matches on Subject: below --
2017-07-18 0:45 Randy Brukardt
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