Hi,

On 12/6/20 8:49 pm, Riccardo Mottola via Dng wrote:
> Hi all!
>
> I just upgraded from ascii to beowulf a pretty decent laptop, equipped
> with a core i7 and 8GB of RAM.
>
> I upgraded everything in place: so same desktop environment, same
> applications, same hard disk... just "apt-get dist-upgrade" essentially.
>
> I even kept gcc6 because I had it before and I need it.
>
> My test case is compiling ArcticFox, thus something in the realm of
> Firefox: lots of compiler activity, make, disk access, make and python.
> But, of course, predominant factor is compilation and linking.
>
> With ascii, I was consistently (= not just one build) doing a clean
> build in about 31 minutes! Quite fast for this small beast and I was happy.
>
> With beowulf, this number is consistently about 41 minutes.
>
> I say this is a very significant slowdown! Can I gain some speed back?
> Some setting? some spectre/meltdown mitigation? Having latest ascii, I
> think I had at least some of the backports.
>
>
> I am wary thus updating to beowulf on slower machines.

Just an idea, but it might be spectre/meltdown mitigations?


A.