Dears, I am Matias Vara and Tias Guns has just suggested me that my proposal for a stand fits better as lightningtalk at the microkernel devroom. However, the deadline for such talks already past. There is any possibility to consider my proposal for stand as a proposal for a lighningtalk ? Thanks in advance, Matias. ----- Mensaje reenviado -----

De: "Tias Guns" <tias@fosdem.org> Para: "Matias Vara larsen" <matias.vara_larsen@inria.fr>, stands@fosdem.org Enviados: Martes, 2 de Diciembre 2014 22:09:04 Asunto: Re: request for stand (Toro Project)

Hi Matias,

Thank you for your stand proposal. It has been added to the list of candidates.

I must add that a topic like the one you propose makes much more chance as a lightningtalk (see website), then as a stand.

Actually, perhaps the best place would be the devroom about microkernels: https://lists.fosdem.org/pipermail/fosdem/2014-November/002061.html

Please contact them ASAP as the deadline may be near or have already past. Feel free to include this communication in it.

Kind regards, Tias

On 11/19/2014 03:25 PM, Matias Vara larsen wrote:

...

Dears,

I am Matias Vara (http://www-sop.inria.fr/members/Matias.Vara_Larsen/), founder and main developer of TORO since 2006. Currently, I am doing a PhD in Computer Science at INRIA, Nice, France. In this email, I am proposing a stand about Toro Kernel project (http://sourceforge.net/projects/toro/, http://torokerneleng.blogspot.com/). In systems with high-grade multiprocessing, we have identified two bottlenecks: in the accessing of the memory bus and in the shared resources. To deal with these issues, we propose a dedicated kernel named TORO that is optimized to run a single multi-threading application. TORO is demonstrating an innovative operating system by integrating at the same ring level both kernel and the user application server. In addition, the accessing to resources (e.g., Filesystem, Networking, Memory) is dedicated to specific processor. Then, only the CPU where is dedicated the resource is allowed to access to the instance of the resource. As a result of this design, the kernel provides direct access to all resources without any overhead, and therefore maximizes performance for the overall system. To sum-up the approach, in TORO, the threads of the user application server are distributed evenly on all CPUs and running independently in parallel. The memory model chosen is NUMA without pagination. During the initialization, the memory is divided proportionally for each processor installed on the system. When a thread needs memory, the memory allocator returns a free block of memory depending on which CPU the thread is running. In the same way, TORO can dedicate resources to specific processor, i.e., a FileSystem. This only CPU then can access to this instance of FileSystem. The scheduler is based on the cooperative threading model, therefore due to this design, TORO can migrate threads between CPUs and send messages between threads without using any lock instruction. FOSDEM is a very good place to discuss general purpose operating systems vs. dedicated operative systems. This discussion can be motivated by showing the characteristics of TORO. To do so, I am proposing a stand with a poster and examples of applications ported to TORO. The aim of the poster is to show the goals of the kernel, thus highlighting the main differences with a general purpose OS. The examples aim to show how the main goals of the kernel have been implemented. These examples are currently in the git repository of TORO, and can be easily tested in a virtual machine like QEMU or Bochs.

Kinds Regards, Matias.

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