Re: Wonderful World of Linux 2.6 - Final

Andrea Arcangeli
2003-12-19T00:03:05Z

On Thu, Dec 18, 2003 at 05:58:55PM -0600, Andrew Theurer wrote:
> On Thursday 18 December 2003 17:52, Andrea Arcangeli wrote:
> > On Thu, Dec 18, 2003 at 09:29:46AM -0600, Andrew Theurer wrote:
> > > be scheduled optimally, for example, a kernel compile with -j4 on a 4-way
> > > P4, with and without HT:
> > >
> > > average of 10 kernel compiles with -j4 on 2.6.0-test9:
> > >
> > > HT disabled: Elapsed: 145.086s User: 513.808s System: 44.724s CPU: 384.5%
> > > HT enabled: Elapsed: 172.463s User: 633.856s System: 48.003s CPU: 394.8%
> >
> > is that 4-way a 4-logical-way or 4-physical-way? If it's a 4-logical
> > way, this workload is much closer to the best case than the worst case.
> > I'm guessing a simple -j2 or -j3 should do much worse than that.
>
> This is 4-way physical/4-way logical (no HT) vs 4-way physical/8-way logical
> (with HT)

ok then it was closer to the worst case ;)