Re: gp-2.15.3 compiled on Ubuntu on AMD 7600X very slow compared to i7 (many page faults), Win11 gp-2.15.3 on 7600X better than i7. How to fix AMD Ubuntu?

[hermann@stamm-wilbrandt.de]

On 2023-06-27 09:10, Bill Allombert wrote:
> There used to be (it was called MACHINES, see commit
> 6cf8508275cbfd566682b0fc66f1a631e6b29b9d) but nowadays this bench only 
> measure
> the time it takes to read the test files.
>
> > This seems to be fast ...
>
> It is ! It is the same time as on the Mac M1.
Cool, best M1 is "only" rank 63 with value 3871 in Passmark "Single 
Threaded Performace" list of 3,100+ CPUs:
https://www.cpubenchmark.net/singleThread.html

I managed to get my new 619$ only PC to run with 5.3GHz, although I had 
to reset Bios by shortening "Clear CMOS Jumper" and not knowing why 
default settings now show this. I added the details sofar:
https://github.com/Hermann-SW/7600X#details-of-pc

Now this PC is on rank 18 of the 3,100+ CPU single core list with value 
4222.

"make bench" became much faster as well:
hermann@7600x:~/Downloads/pari-2.15.3$ make bench
Making bench in Olinux-x86_64
make[1]: Entering directory 
'/home/hermann/Downloads/pari-2.15.3/Olinux-x86_64'
* Testing objets           gp-sta..TIME=    0   gp-dyn..TIME=    1
* Testing analyz           gp-sta..TIME=    4   gp-dyn..TIME=    5
* Testing number           gp-sta..TIME=    5   gp-dyn..TIME=    5
* Testing polyser          gp-sta..TIME=    0   gp-dyn..TIME=    2
* Testing linear           gp-sta..TIME=    0   gp-dyn..TIME=    0
* Testing elliptic         gp-sta..TIME=    6   gp-dyn..TIME=    4
* Testing sumiter          gp-sta..TIME=    2   gp-dyn..TIME=    0
* Testing graph            gp-sta..TIME=    1   gp-dyn..TIME=    0
* Testing program          gp-sta..TIME=    1   gp-dyn..TIME=    1
* Testing trans            gp-sta..TIME=    4   gp-dyn..TIME=    1
* Testing nfields          gp-sta..TIME=   18   gp-dyn..TIME=   19
+++ Total bench for gp-sta is 26
+++ Total bench for gp-dyn is 22
make[1]: Leaving directory 
'/home/hermann/Downloads/pari-2.15.3/Olinux-x86_64'
hermann@7600x:~/Downloads/pari-2.15.3$


And most importantly, 7600X CPU determines "sqrt(-1) (mod p)" for 
100,355-digit prime in 75.7% runtime of i7-11850H CPU (matching single 
threaded list numbers for both CPUs well: 3152 / 4222 = 74.7%).


Now I feel to have the right PC for playing with PARI/GP, number theory 
and integer factorization ... ;-)


Regards,

Hermann.