From: andrey100100100@gmail.com
To: 9fans@9fans.net
Subject: Re: [9fans] syscall silently kill processes
Date: Mon, 20 Jun 2022 00:22:38 +0300 [thread overview]
Message-ID: <86055e9ba3dbe8ef06764d6d674830a8ec9404fa.camel@gmail.com> (raw)
In-Reply-To: <e9f6a0eb-d0f2-94a4-9adb-ae431c78a0d4@SDF.ORG>
В Вс, 19/06/2022 в 16:41 +0000, adr пишет:
> On Sun, 19 Jun 2022, andrey100100100@gmail.com wrote:
> > Yes, you were absolutely right, the thread library needs some work.
> >
> > It is impossible to use multiple processes with notes, due to the
> > exhaustion of the NFN limit.
>
> Andrej, what are you going to do with alarm in the real thing?
The note 'alarm' is needed to interrupt the system call on timeout
since system calls to lan 9 can be of a network nature, a notes is
indispensable.
A great example of this is the read() system call on a udp-connection.
How else can this system call be interrupted?
> You could use threads (cooperative round-ribbon multitasking) using
> some data log to register their state and use a "master" thread to
> control them (kill them, change some data structure, etc).
>
> You can use rfork, locks, pipes, etc and forget about libthread.
>
> You could experiment with the topology of the nodes, for example
> instead of a big star you can simplify things a lot using chains
> of nodes where the last node sends the chain data to the analyzer
> (you were talking about polling sensors):
>
> aNode1 --> aNode2 --> aNode3 --> ... --> aNoden -->
>
> > --- > Anz
> bNode1 --> bNode2 --> bNode3 --> ... --> bNoden -->
>
> Imagine that n=100. Each node only has to make a connection with
> 2 nodes (the first of the chain just one), adding data to the
> received one and send it to the next. Anz only has to make a
> connection with the last nodes of the chains, two in this case,
> and process the data received. Of course you have to play with your
> numbers, the acceptable delay, etc.
>
> I'm pretty sure people here could point you to some examples using
> plan9, and note that you could use raspberry pi zeros as nodes.
>
> Have fun.
>
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next prev parent reply other threads:[~2022-06-19 21:23 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-17 9:37 andrey100100100
2022-06-17 13:46 ` Thaddeus Woskowiak
2022-06-17 14:11 ` Jacob Moody
2022-06-17 14:39 ` Thaddeus Woskowiak
2022-06-17 15:06 ` andrey100100100
2022-06-17 16:08 ` Skip Tavakkolian
2022-06-17 16:11 ` Skip Tavakkolian
2022-06-17 16:16 ` Skip Tavakkolian
2022-06-17 17:42 ` adr
2022-06-17 16:11 ` Jacob Moody
2022-06-17 18:48 ` andrey100100100
2022-06-17 19:28 ` Jacob Moody
2022-06-17 21:15 ` adr
2022-06-18 6:40 ` andrey100100100
2022-06-18 8:37 ` adr
2022-06-18 9:22 ` adr
2022-06-18 12:53 ` Jacob Moody
2022-06-18 22:03 ` andrey100100100
2022-06-19 5:54 ` adr
2022-06-19 6:13 ` Jacob Moody
2022-06-18 22:22 ` andrey100100100
2022-06-18 16:57 ` andrey100100100
2022-06-19 2:40 ` adr
2022-06-19 5:01 ` adr
2022-06-19 8:52 ` andrey100100100
2022-06-19 10:32 ` adr
2022-06-19 11:40 ` andrey100100100
2022-06-19 12:01 ` andrey100100100
2022-06-19 15:10 ` andrey100100100
2022-06-19 16:41 ` adr
2022-06-19 21:22 ` andrey100100100 [this message]
2022-06-19 21:26 ` andrey100100100
2022-06-20 4:41 ` adr
2022-06-20 5:39 ` andrey100100100
2022-06-20 5:59 ` adr
2022-06-20 15:56 ` andrey100100100
2022-06-20 22:29 ` Skip Tavakkolian
2022-06-21 7:07 ` andrey100100100
2022-06-21 11:26 ` adr
2022-06-21 13:03 ` andrey100100100
2022-06-21 13:22 ` adr
2022-06-28 15:28 ` adr
2022-06-28 16:43 ` ori
2022-06-28 18:19 ` adr
2022-06-28 18:28 ` adr
2022-06-28 19:09 ` andrey100100100
2022-06-28 19:42 ` adr
2022-06-29 13:14 ` adr
2022-06-21 13:47 ` andrey100100100
2022-06-21 7:22 ` adr
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