[nycbug-talk] make -jN performance

[Pete Wright]

On Thu, Jan 20, 2005 at 12:14:08PM -0500, dlavigne6 at sympatico.ca wrote:
> 
> > 
> > From: Isaac Levy <ike at lesmuug.org>
> > Date: 2005/01/20 Thu AM 11:59:45 EST
> > To: Pete Wright <pete at finn.nomadlogic.org>
> > CC: talk at lists.nycbug.org
> > Subject: Re: [nycbug-talk] make -jN performance
> > 
> > Hey All,
> > 
> > On Jan 19, 2005, at 5:34 PM, Pete Wright wrote:
> > 
> > > hmm...then it looks like I should submit a PR to the doc team 
> > > then...well
> > > atleast it was an interesting exercise :)
> > >
> > > -pete
> > 
> > Yeah- I wanted to pipe in quicklike with this one with some super-crude 
> > test results,
> > 
> > Basically I've been compiling a lot of FreeBSD jails lately, so what 
> > the hey, I've thrown in some -j flags informally to see what happens, 
> > here's my results:
> > 
> > --
> > Single CPU (crufty old office 800mhz PIII):
> > 
> > - No flags, make world takes 49 min average.
> > - j2, j4, j6, j10, all take 50 min average.
> > 
> > --
> > Dual CPU (new-ish Dual Xeon 2.6mhz, under other server load):
> > 
> > - No flags, make world takes 22 min average.
> > 
> > - j2, j4, j6, j10, all take about 12 min average. (NICE.)
> > 
> > 
> > 
> > --
> > Lots of other stuff could affect my results here, but in a nutshell, it 
> > seems that the j flag has no effect unless there's more than 1 
> > processor.
> 
> Is this on a 4.x or a 5.x system? I'm wondering if there's a difference between the two...
> 

My initial test were on a 5.3 box (dual P-III 1.2ghz, 1.5gigRAM, Stripped 10K SCSI disks)

-pete

> Dru
> 

-- 
~~oO00Oo~~
Peter Wright
pete at nomadlogic.org
www.nomadlogic.org/~pete
917.415.9866