Re: [gentoo-user] Graphics configuration for a Ryzen 7 7700X chip and water cooling.

[ralfconn <mentadent47@yahoo.com>]

Il 16/05/24 20:46, Dale ha scritto:
> Question.  How are the compiles times between the old FX-8350 and the
> newer Ryzen 9?  I currently have a FX-8350.  Plan to build to a new
> Ryzen something, maybe 5 at first.  Just curious what difference in
> speed you see.
I've not saved the merge times for the 8350 so I'll only give you the 
Ryzen 9 times, maybe you can compare with yours:

# qlop -mav net-libs/webkit-gtk
net-libs/webkit-gtk-2.44.1-r410: 41′22″ average for 1 merge
net-libs/webkit-gtk-2.42.5-r410: 19′45″ average for 2 merges
net-libs/webkit-gtk-2.42.4-r600: 47′39″ average for 1 merge
net-libs/webkit-gtk-2.42.4-r410: 48′55″ average for 1 merge
net-libs/webkit-gtk-2.42.3-r410: 21′09″ average for 1 merge

# qlop -mav firefox
www-client/firefox-126.0: 31′35″ average for 1 merge
www-client/firefox-125.0.3: 13′29″ average for 1 merge
www-client/firefox-125.0.2: 12′42″ average for 1 merge
www-client/firefox-125.0.1: 30′18″ average for 1 merge

The 2x or more difference in merge times I believe are due to the fact 
that sometimes I build the bigger packages on their own to avoid running 
out of memory, other times I don't so the load gets split amongst 
various compilations and time stretches. I think firefox with the 8350 
was in the hours range, so I had switched to the -bin since long time.

I have 64Gb of RAM to account for the 12cpus/24threads. Even so I can 
run out of memory if I try to build firefox+thunderbird+webkit-gtk at 
the same time, so I often use the --exclude emerge option with these 
behemoths.

I've also had a Ryzen 7 5700X/32Gb for a short time, then I passed it to 
my son and got me the 9. These are the merge times for the webkit-gtk, I 
switched to non-bin firefox only with the 9:

# qlop -mav net-libs/webkit-gtk
net-libs/webkit-gtk-2.40.5-r410: 26′52″ average for 1 merge
net-libs/webkit-gtk-2.40.4-r410: 25′16″ average for 1 merge
net-libs/webkit-gtk-2.40.3-r410: 59′46″ average for 1 merge
net-libs/webkit-gtk-2.40.2-r410: 32′47″ average for 2 merges

Not a huge difference compared to the 9, as foreseeable, after all it's 
the exact same architecture with some more pepper.

If you go for the Ryzen remember that its instruction set is not 
compatible with the Athlon's so if you built your 8350 system with e.g. 
-march=native (as I did) you need to recompile @world with a less 
restrictive -march before moving the disk to the Ryzen system otherwise 
it won't even boot.

raf