Re: Kernel 2.4.x and 2.4.1-preX - Higher latency then 2.2.xkernels?

Shawn Starr
2001-01-28T02:56:35Z

Andrew, the patch HAS made a difference. For example, while untaring glibc-2.2.1.tar.gz the
system was not sluggish (mouse movements in X) etc.

Seems to be a go for latency improvements on this system.

Shawn Starr wrote:

> Applying now.
>
> Andrew Morton wrote:
>
> > Shawn,
> >
> > I've pretty much completed the low-latency patch against reiserfs.
> > It seems to be a little more latency-prone than ext2, but under normal
> > workloads it's not significant. The worst-case is 100 milliseconds,
> > but that's when you're doing insane things to it.
> >
> > You may care to apply http://www.uow.edu.au/~andrewm/linux/2.4.1-pre10-low-latency.patch
> > against 2.4.1-pre10 and see if it "feels" different. I'd be surprised
> > if it does, but the result would be interresting.
> >
> > Note that the low-latency capability must be enabled under the
> > "Processor type and features" menu, and if you also enable the
> > low-latency sysctl option, you'll need to
> >
> > echo 1 > /proc/sys/kernel/lowlatency
> >
> > to make it happen. Creature feep :)