On Tue, 10 Jul 2007 18:14:19 -0700 Andrew Morton <[EMAIL PROTECTED]> wrote:
> On Wed, 11 Jul 2007 11:02:56 +1000 "Matthew Hawkins" <[EMAIL PROTECTED]> > wrote: > > > We all know swap prefetch has been tested out the wazoo since Moses was a > > little boy, is compile-time and runtime selectable, and gives an important > > and quantifiable performance increase to desktop systems. > > Always interested. Please provide us more details on your usage and > testing of that code. Amount of memory, workload, observed results, > etc? > I often leave long compiles running overnight (I'm a gentoo user). I always have the desktop running, with quite a few applications open, usually firefox, amarok, sylpheed, and liferea at the minimum. I've recently tried using a "stock" gentoo kernel, without the swap prefetch patch, and in the morning when I get on the computer, it hits the disk pretty hard pulling my applications (especially firefox) in from swap. With swap prefetch, the system responds like I expect: quick. It doesn't hit the swap at all, at least that I can tell. Swap prefetch definitely makes a difference for me: it makes my experience MUCH better. My system is a Core Duo 1.83GHz laptop, with 1GB ram and a 5400 rpm disk. With the disk being so slow, the less I hit swap, the better. I'll cast my vote to merge swap prefetch.
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