Re: [gentoo-user] Re: Is perl broken?

[Peter Humphrey]

This is a re-send of a message I sent earlier today but which seems not to 
have appeared on the list - well, I have changed it a bit:

On Tuesday 07 April 2015 23:19:18 I wrote:
> On Tuesday 07 April 2015 15:02:36 walt wrote:
> > On 04/07/2015 02:48 PM, Peter Humphrey wrote:
> > > On Tuesday 07 April 2015 22:24:38 Peter Humphrey wrote:
> > >> $ cat make.conf 	# I made a local copy and removed a lot of
comments
> > >> #CFLAGS="-O2 -march=core2 -pipe" [1]
> > >
> > > --->8
> > >
> > >> [1] This bothers me. Various docs tell me to specify march=corei7,
> > >> but
> > >> this is an i5 CPU. Could this be my problem?
> >
> > Any reason you don't want to use march=native?
>
> Not that I can think of now. I'll try it - thanks, both of you.

Countless CPU cycles later, I have now reinstalled my complete system with  
-march=native. It took several iterations.

Meanwhile,I had another problem to keep me amused - KMail decided I'd 
deleted the folder into which it receives all inbound mail. I hadn't, of 
course, but suddenly my 13000 mails were gone - vanished. So I had to create 
a new user and import them all from the previous day's backup. Tedium - 
yawn...

Still, all my filters have gone, and I'll have to define new ones as I need 
them. Oh well, I suppose it's about time I cleaned them out.

Back to the original theme, I'd been experimenting with -j and -l make 
options, and I suspect that was my real problem. I finished up with "-j -l20" 
on this i5 box, with startling results - 56 emerges in parallel for 
instance. I suspect that my problem stemmed from this.

All now seems stable so far with -j12 and no -l specified. Satisfactory CPU 
utilisation and the all-important stability.

So no, perl isn't broken  :)

-- 
Rgds
Peter