Ned,moe, l4linux interaction
Dear all, I see that in the default l4linux configuration, it uses ned, moe to start up. However, I am not sure about the run-time interaction between them. More specifically, a. Does l4linux need them during its run-time? For example, does l4linux go directly to sigma0 for memory or does it go through ned? b. Do ned and moe get killed once they start l4linux or not? Thanks, ramya ___ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
Re: Difference between capability and memory mapping
Hi, On Mon Sep 29, 2014 at 13:24:56 -0400, Yuxin Ren wrote: I found in the kernel, the capability mapping and memory mapping have very similar code path. But I found their performance difference is around 1000 cycles. Is this true? If it is true, why do they have such large difference? If this gap does not make sense, it should be a bug in my test. Hmm, yes, there can be a difference. Of course, the number depends on the hardware. Which one was slower/faster? For example, for memory there there could be the need to TLB flushes, so it could be slower than cap mappings. Adam -- Adam a...@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/ ___ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
Re: Ned,moe, l4linux interaction
On Tue Sep 30, 2014 at 15:01:15 +, Masti Ramya Jayaram wrote: I see that in the default l4linux configuration, it uses ned, moe to start up. However, I am not sure about the run-time interaction between them. More specifically, a. Does l4linux need them during its run-time? For example, does l4linux go directly to sigma0 for memory or does it go through ned? moe is required during runtime. ned is required in a sense that it created the communication channels so if it would go away those channels would collapse. However, it's not actively used during runtime. b. Do ned and moe get killed once they start l4linux or not? No, they're both running on. Actually, they're never killed. Adam -- Adam a...@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/ ___ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
