Re: [gentoo-user] NAS box and switching from Phenom II X6 1090T to FX-6300

[Dale <rdalek1967@gmail.com>]

Meik Frischke wrote:
> Am 2024-04-17 12:33, schrieb Dale:
>> I found a benchmark website that compares the two.  Link below.  It
>> claims about 80% faster.  In some ways, twice as fast. Sometimes those
>> bench tests don't reflect the real world to well.  Most of them seem to
>> test gaming speeds which isn't of much use anyway for me.  I'm more
>> about compiling and such.  Just wondering how much speed difference this
>> would make.  Maybe someone reading this did a similar upgrade or has
>> seen both in action.  If so, post and share your thoughts. 
>>
>
> Hi Dale,
>
> since Moore's Law isn't quite dead yet there is a significant
> performance uplift in newer processor generations, especially with the
> smaller 5nm process nodes of recent, after some years of stagnation at
> 14nm (your FX-8350 was manufactured at 32nm). With each process shrink
> (32nm -> 28nm -> 22 nm -> 14nm -> 10nm -> 7nm -> 5nm) new CPUs can
> deliver higher performance with the same power consumption or achieve
> similar performance levels with lower power consumption.
> Looking at the open-benchmarking default configuration kernel compile
> benchmark (pts/build-linux-kernel-1.15.0), the Ryzen 5 7600 (slower
> non-X) took ~101s to compile the kernel (based on 28 submitted
> results) while the FX-8350 took ~422s for the same task (based on 4
> submissions) [1]. Unlike gaming, compiling tends to scale quite well
> with core count and for the gentoo use-case the measured performance
> difference is in most cases similar for different packages. There are
> many influencing factors for benchmarking like running kernel version,
> activated options and mitigations so YMMV, but you can test it
> yourself: there are ebuilds for the phoronix-benchmark-suite in
> various overlays [2]. You can perform the benchmark with
> $(phoronix-test-suite benchmark pts/build-linux-kernel-1.15.0) with
> the "defconfig" test configuration option.
>
> Cheers,
> Meik
>
> [1]
> https://openbenchmarking.org/test/pts/build-linux-kernel&eval=9cdcd82c9c47af9df17263e4312f634338dbf476#metrics
> [2] https://gpo.zugaina.org/app-benchmarks/phoronix-test-suite
>
>


If one just compares the kernel compile time, about 4 times faster.  I'm
not expecting the accuracy one needs to build a space ship.  ;-)  That's
a pretty good way to measure because with Gentoo, compiling a kernel is
a very common thing.  As you said, it scales well.  Compiling gcc would
be a good one to if they have default USE flags.  Obviously if one
system has a lot of USE flags enabled and another is the bare minimum,
there will be a difference not related to CPU speed.  Rich made a good
point too.  Speed isn't just influenced by the CPU.  Memory speed and
even the speed of accessing data drive, spinning rust, SSD or whatever,
also affects a system. 

When I get this new rig built and you see me post about it, remind me
and I'll install that benchmark test and send in the results.  I like
doing things like that because it helps others too.  I just wish there
was a centralized place for them all.  Right now, there are likely
dozens of them and each with their own method. 

Thanks for that info.  I'm making progress and planning a way to
purchase all this.  It's still not cheap but cheaper than it was before
I found out I could get a cheaper CPU and upgrade later. 

Dale

:-)  :-)