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| SCHED_DEADLINE v6 released |
| By special contributor cloud on 2012-10-27 01:05:38 |
| A new version of the real-time Linux scheduler called SCHED_DEADLINE has been released on the Linux Kernel Mailing List. For people who missed previous submissions, it consists of a new deadline-based CPU scheduler for the Linux kernel with bandwidth isolation (resource reservation) capabilities. It supports global/clustered multiprocessor scheduling through dynamic task migrations. This new version takes into account previous comments/suggestions and is aligned to the latest mainline kernel. A video about SCHED_DEADLINE is also available on YouTube. |
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| Demo? Almost. |
| By ericxjo on 2012-10-27 01:50:26 |
|
From the YouTube description: Unfortunately, however, the movie has been filmed in sequence, and then assembled to let people understand that all these activities were concurrent (we were not able of making three video simultaneously). Well, that undermines the demo... |
 - Score: 2 |
| RE: Demo? Almost. |
| By Alfman on 2012-10-27 03:56:37 |
|
ericxjo, Well, it probably boiled down to something as simple as them not having three cameras. I don't have any trouble believing it could do all three at the same time. Although they should have panned from one to the next. Even a non-realtime kernel should have been able to handle those three tasks simultaneously without any trouble at all on an old 486. I'd be more impressed if the tasks demanded much harder real time restraints. And then executing them while compiling linux and browsing with firefox! |
| - Score: 5 |
| lie-nux at it again. |
| By sameer on 2012-10-27 08:09:32 |
|
hello all, it seems to me that this sooper-dooper "sched_deadline" scheduler simply is partition scheduling which was made mainstream by the best control program ( os ) presently qnx 6. even though i use mint linux executing off a usb drive... linux is simply a badly written program with big claims. it is too complicated ( libraries, many commands, slow, crashy... ). lie-nux... |
| - Score: -8 |
| RE: lie-nux at it again. |
| By NuxRo on 2012-10-27 10:01:18 |
| And because it's such a useless, big lie that it took over most of the computing world. You're a funny guy. |
| - Score: 6 |
| RE[2]: lie-nux at it again. |
| By sameer on 2012-10-27 10:56:33 |
|
hello nuxro, if only numbers were to be taken as credible, even capitalism is good and india is a super-power. believable ?? ------------------- i know about computing... i built the first control program ( os ) of south asia, in 2002. it was based on microkernel architecture but ran in x86 "real mode". just a demonstrator. had message passing and unix-like "signals". i called it "dragunovos"... from the soviet sniper rifle dragonov. Edited 2012-10-27 11:12 UTC |
| - Score: -4 |
| RE[3]: lie-nux at it again. |
| By WereCatf on 2012-10-27 12:09:12 |
|
For some reason I do not believe a thing you're saying. > even though i use mint linux executing off a usb drive... linux is simply a badly written program with big claims. it is too complicated ( libraries, many commands, slow, crashy... ). A badly written program with many commands and libraries? If you were an OS-developer you'd know the difference between a kernel and userland. |
| - Score: 7 |
| RE[4]: lie-nux at it again. |
| By sameer on 2012-10-27 12:23:49 |
|
you have answered your own doubts. the good os is simple in architecture, which makes it reliable and easy to add to ( modules ) or remove. how much ever one "hardens" the linux kernel, how much ever ones one shifts whatever to "user-land"... by architecture linux is not microkernel. so this talk about "user-land" is shouting out that in linux there is not natural separation between kernel and "what ever one might call it". it is the entire architecture of linux at fault... or is there a architecture at all ?? i have 512 megabyte in my desktop ( mint linux ). i have to restart most days. it just hangs. i only use mint linux because the windows xp machine was not allowing me to access the win-xp boot partition. don't forget the aspect of these complicated "dependencies" when one has to "install" some program. what happened to the unix method of copy some program to a directory and just use it ?? Edited 2012-10-27 12:31 UTC |
| - Score: -3 |
| RE[5]: lie-nux at it again. |
| By WereCatf on 2012-10-27 12:30:56 |
|
> you have answered your own doubts. You're not making any sense here. > the good os is simple in architecture No, a good OS is one that fits its intended purpose. There is no single definition of a "good os." > by architecture linux is not microkernel. And? No one claimed it was. > so this talk about "user-land" is shouting out that in linux there is not natural separation between kernel and "what ever one might call it". Oh, really? Why are there so many different operating systems which use Linux-kernel but an entirely different userland? Oh, that's right: you have no idea what you're talking about. > don't forget the aspect of these complicated "dependencies" when one has to "install" some program. what happened to the unix method of copy some program to a directory and just use it ?? Ahahaha. Fail. Next time learn what you're talking about. Edited 2012-10-27 12:32 UTC |
| - Score: 4 |
| RE[6]: lie-nux at it again. |
| By sameer on 2012-10-27 12:38:19 |
|
sorry it is you not making sense. you said... -----------> "Oh, really? Why are there so many different operating systems which use Linux-kernel" firstly such programs cannot be anything other than being called "distros". the second part after that... -----------> "but an entirely different userland" i did not understand. is there some great development in the linux parallel universe that i don't know about. if one uses the "system v ipc" in linux, that would not be linux at all, yes ?? so you are now questioning the existance of qnx. when you said fail... please elaborate. Edited 2012-10-27 12:43 UTC |
| - Score: -3 |
| RE[7]: lie-nux at it again. |
| By WereCatf on 2012-10-27 12:44:25 |
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> "Oh, really? Why are there so many different operating systems which use Linux-kernel" firstly such programs cannot be anything other than being called "distros". Android is a good example of a Linux-kernel with non-GNU userland. There are also plenty of different kinds of embedded systems that use Linux-kernel without GNU-userland, like e.g. HDTVs and several BluRay-players. > when you said fail... please elaborate. Package manager - files has nothing to do with the application itself. You CAN just copy and application and its dependencies to another directory and run it from there just fine. You've clearly never heard of shared libraries and the likes and you just expect all applications to be statically compiled, and that says enough about your level of technical abilities. |
| - Score: 3 |
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