On Wed, May 16, 2001 at 03:37:00PM -0700, Scott Huang wrote:
> Four adapters need to produce data to a
> descriptor queue which is consumed by a
> user process. A lock mechanism was implemented
> to sync the adapters. However, this causes
> a performance hit. Is it possible to use
> CMPXCHG on Intel's i-386 to avoid the locking?
What about using atomic operations for that? This is more general
and works on ALL architectures. CMPXCHG is just and special
atomic operation on ia32.
> Where can I find some doc and some sample code?
Documentation/DocBook/kernel-hacking.tmpl
But better do
make htmldocs
in the kernel top level directory and read
Documentation/DocBook/kernel-hacking/lk-hacking-guide.html
instead.
Sample code is scattered all around in the kernel.
Regards
Ingo Oeser
--
To the systems programmer,
users and applications serve only to provide a test load.
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