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Phoronix: DragonFlyBSD 3.2.1 Battles Against Linux For Speed
The much-anticipated release of DragonFlyBSD 3.2 is now available as it enhances its performance to better compete with Linux in multi-core environments...
http://www.phoronix.com/vr.php?view=MTIyMTM
a monolithic kernel is always faster than a kernel that passes messages queues. it would be almost impossible to beat linux in performance.Quote:
Originally Posted by phoronix
Obligatory "Why is everyone working on different things? Why don't we all work together in unison to build the ultimate kernel/distro/package format" post.
Everyone is working on different things, because everyone is trying to achieve different goals.Quote:
Originally Posted by Ancurio
There is no perfect (suitable for every task) kernel/distro/package format.
DragonFlyBSD doesn't use message quene so much.Quote:
Originally Posted by garegin
http://www.phoronix.com/scan.php?pag...tem&px=MTIwNjA
Of course 2.6.32 is a bit old.
The DragonFly kernel *is* monolithic. There are some various api's in kernel to support different types of multithreaded scenariosQuote:
Originally Posted by garegin
when those scenarios would be better than some other alternative (e.g. a lock, etc) -
But it is *not* a mach-style microkernel where everything is message passing, etc.
disclamer: I am a dragonfly dev
http://en.wikipedia.org/wiki/SarcasmQuote:
Originally Posted by LightBit
Wikipedia disagrees with you: https://en.wikipedia.org/wiki/DragonFly_BSD#Kernel.Quote:
Originally Posted by dfcat
There's more to kernels than just a _strict_ monolithic or microkernel approach.Quote:
"DragonFly's kernel is a hybrid, containing features of both monolithic and microkernels, such as the message passing capability of microkernels enabling larger portions of the OS to benefit from protected memory, as well as retaining the speed of monolithic kernels for certain critical tasks. The messaging subsystem being developed is similar to those found in microkernels such as Mach, though it is less complex by design. DragonFly's messaging subsystem has the ability to act in either a synchronous or asynchronous fashion, and attempts to use this capability to achieve the best performance possible in any given situation.[7]"
https://en.wikipedia.org/wiki/StupidityQuote:
Originally Posted by Ancurio
4 years ago the _microkernel_ Minix3 creator Andrew Tanenbaum was granted 2,5 million € for his "Research on Really Reliable and Secure Systems Software": http://www.minix3.org/news/index.html
I don't know how well you can reload drivers or whole subsystems after a crash in a monolithic kernel but usually the main focus is very fundamentally on performance and then on everything else: http://www.minix3.org/other/research-projects.html
Quote:
Automatic recovery from fatal system errors
In most operating systems, a fatal error within the operating system, for example, referencing an invalid pointer, leads almost immediately to a system crash. In MINIX 3, such an error leads to the crash of one of the operating system components, but not the entire system. The crash is reported to a system component called the reincarnation server, which takes an appropriate action, typically including logging the event, notifying the system administrator, and restarting the failed component. For stateless components, the recover is very quick and completely transparent to application processes, that is, they do not even notice the failure and recovery. Research on automatic recovery of stateful components is underway. Sample paper on recovery in MINIX 3.
What is your fucking point?Quote:
Originally Posted by ArchLinux
The irony.Quote:
Originally Posted by Ancurio