Messages in this thread | | | Date | Sat, 03 Jul 1999 02:21:04 +0200 | From | Sven Heursch <> | Subject | Re: HZ and real-time performance |
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nunca wrote:
> I've been playing with writing real-time guitar effects boxes, and I've > gotten the latency down to 11ms with stock linux. Would changing the HZ > constant to 1024 help me reduce the latency (ie, does it cause a task to > get scheduled more often)? Any other/better suggestions for decreasing > latency? Thanks in advance. > -Nolan > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/ > > - > Posted automagically by a mail2news gateway at muc.de e.V. > Please direct questions, flames, donations, etc. to admin@newsgate.muc.de
for POSIX 4 (today better: IEEE 1003.1b Real time & I/O) you should read this document:
ftp://ftp.informatik.uni-erlangen.de/local/cip/mskuhn/misc/linux-posix.1b
because this document is not very new, there are a few changes in the linux kernel and the glibc 2.1.
New are for example the "_POSIX_REALTIME_SIGNALS". But for the newest possiblities you should look into the sources of the glibc or the kernel header files! (unistd.h etc.)
Very interesting is the fact that a few features cannot be implementet. e.g. the POSIX function pthread_attr_setscope(), because of the "one-to-one" model of linux threads.
greetings
S.Heursch
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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