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* [Fwd: low-latency patches]
@ 2001-10-06  6:52 J Sloan
  2001-10-07 18:07 ` george anzinger
  0 siblings, 1 reply; 5+ messages in thread
From: J Sloan @ 2001-10-06  6:52 UTC (permalink / raw)
  To: linux-kernel

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From: J Sloan <>
To: Bob McElrath <>
Subject: Re: low-latency patches
Date: Fri, 05 Oct 2001 23:51:55 -0700
Message-ID: <>

Bob McElrath wrote:

> It seems there are two low-latency projects out there.  The one by Robert Love:
> and the original one:
> Correct me if I'm wrong, but the former uses spinlocks to know when it can
> preempt the kernel, and the latter just tries to reduce latency by adding
> (un)conditional_schedule and placing it at key places in the kernel?
> My questions are:
> 1) Which of these two projects has better latency performance?  Has anyone
>     benchmarked them against each other?
> 2) Will either of these ever be merged into Linus' kernel (2.5?)
> 3) Is there a possibility that either of these will make it to non-x86
>     platforms?  (for me: alpha)  The second patch looks like it would
>     straightforwardly work on any arch, but the for it is only in
>     arch/i386.  Robert Love's patches would need some arch-specific asm...

In my experience with them, the Andrew Morton patches
provide a "smoother" interactive feel, great for things like
online gaming (quake 3 arena, etc), however the Robert
Love patches are simpler, seem less intrusive, and I've
had better luck with them on smp, highmem boxes.

(just IMHO) I like Andrew's patches on (up) workstations,
and Robert's on (smp) servers, with some grey area of
overlap -

I'm hardly the person to say, but the rml patches would
seem more likely to go in sooner, if at all.  I'd love to see
both remain an option.



^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2001-10-07 20:20 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2001-10-06  6:52 [Fwd: low-latency patches] J Sloan
2001-10-07 18:07 ` george anzinger
2001-10-07 18:14   ` Bob McElrath
2001-10-07 19:59     ` george anzinger
2001-10-07 20:20       ` Bob McElrath

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