lkml.org 
[lkml]   [2007]   [Jan]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 0 of 4] Generic AIO by scheduling stacks
Date
> Take FPU state: memory copies and RAID xor functions use MMX/SSE and
> require that the full task state be saved and restored.

Sure, that much is obvious. I was hoping to see what FPU state
juggling actually requires. I'm operating under the assumption that
it won't be *terrible*.

> Task priority is another. POSIX AIO lets you specify request
> priority, and
> it really is needed for realtime workloads where things like keepalive
> must be processed at a higher priority.

Yeah. A first-pass approximation might be to have threads with asys
system calls grouped by priority. Leaving all that priority handling
to the *task* scheduler, instead of the dirt-stupid fibril
"scheduler", would be great. If we can get away with it. I don't
have a good feeling for what portion of the world actually cares
about this, or to what degree.

- z
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-01-31 21:45    [W:0.120 / U:0.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site