So... I've been seeing some Core a8 projects hit my client.

Moderators: Site Moderators, FAHC Science Team

So... I've been seeing some Core a8 projects hit my client.

Postby Crawdaddy79 » Fri Sep 11, 2020 11:28 pm

Only Project 16810 so far, but it nets about 50% higher PPD than most a7 projects (130k vs ~85k, Ryzen 2700X). Nice.

Is the forum subject going to change now that a8 is apparently on Prime Time?
Image
Crawdaddy79
 
Posts: 72
Joined: Sat Mar 21, 2020 4:56 pm

Re: So... I've been seeing some Core a8 projects hit my clie

Postby Bastiaan_NL » Sat Sep 12, 2020 12:23 am

I've seen some good ones already, between 488k and 507k ppd on the 3950x 27 threads.
Project: 16810 (Run 31, Clone 698, Gen 9) was the best so far, 21.7k points!
Most of the units on 3 cpu's are stil A7, about 20% A8.
ImageImage
Bastiaan_NL
 
Posts: 17
Joined: Wed May 13, 2020 5:34 am
Location: Netherlands

Re: So... I've been seeing some Core a8 projects hit my clie

Postby JimboPalmer » Sat Sep 12, 2020 12:39 am

The age of your CPU will affect what kind of folding Core_a8 attempts

Prior to 2011 your CPU does SSE2, so will only have minor speed ups.

Prior to 2013 you CPU does AVX_256, so will also only do minor speed ups, as Core_a7 used these SIMD engines.

Newer CPUs may use AVX2_256 and get the big speed ups. A feature of AVX2_256 is an instruction called FMA (Fused Multiply and Add) This makes Adds 'free', they can be done at the same time as Multiplies. So the speed up approaches 60%

06:14:24:WU00:FS00:0xa8: SIMD: avx_256

I have two CPUs doing SSE2, 8 doing AVX_256, and one doing AVX2_256, as I tend to run old PCs.

https://en.wikipedia.org/wiki/Streaming ... r_versions
Tsar of all the Rushers
I tried to remain childlike, all I achieved was childish.
A friend to those who want no friends
JimboPalmer
 
Posts: 2017
Joined: Mon Feb 16, 2009 5:12 am
Location: Greenwood MS USA

Re: So... I've been seeing some Core a8 projects hit my clie

Postby PantherX » Sat Sep 12, 2020 10:19 am

Crawdaddy79 wrote:...Is the forum subject going to change now that a8 is apparently on Prime Time?

Eventually it will change, assuming that there won't be any unexpected issue with the change :)
ETA:
Now ↞ Very Soon ↔ Soon ↔ Soon-ish ↔ Not Soon ↠ End Of Time

Welcome To The F@H Support Forum Ӂ Troubleshooting Bad WUs Ӂ Troubleshooting Server Connectivity Issues
User avatar
PantherX
Site Moderator
 
Posts: 6562
Joined: Wed Dec 23, 2009 10:33 am
Location: Land Of The Long White Cloud

Re: So... I've been seeing some Core a8 projects hit my clie

Postby mwroggenbuck » Sun Sep 13, 2020 9:12 pm

Jimbo,

Does the project also decide if SSE2/AVX_256/AVX2_256? I have a brand new i9, but the work units are only using AVX_256 (not AVX2_256). Is there some flag I need to set?
mwroggenbuck
 
Posts: 87
Joined: Tue Mar 24, 2020 1:47 pm

Re: So... I've been seeing some Core a8 projects hit my clie

Postby mwroggenbuck » Sun Sep 13, 2020 9:41 pm

Never mind. I was looking at a7 cores. When I look at a8 cores, I am using AVX2_256.

My mistake. :oops:
mwroggenbuck
 
Posts: 87
Joined: Tue Mar 24, 2020 1:47 pm

Re: So... I've been seeing some Core a8 projects hit my clie

Postby JimboPalmer » Sun Sep 13, 2020 10:16 pm

mwroggenbuck wrote:When I look at a8 cores, I am using AVX2_256.:


Yes, AVX2_256 is new in Core_a8. It is nice that F@H is always trying to be faster. This seems to have been a very smooth Beta!

If your CPU does AXX2 and FMA, it should be automatic. I am unaware of any OS requirements over AVX.
JimboPalmer
 
Posts: 2017
Joined: Mon Feb 16, 2009 5:12 am
Location: Greenwood MS USA

Re: So... I've been seeing some Core a8 projects hit my clie

Postby PantherX » Tue Sep 15, 2020 4:44 am

JimboPalmer wrote:...I am unaware of any OS requirements over AVX.

64-bit OS for Linux while 32-bit and 64-bit for Windows. Having said that, I am not sure for how long we will continue to support 32-bit Windows since AMD/Nvidia no longer support 32-bit Windows.
User avatar
PantherX
Site Moderator
 
Posts: 6562
Joined: Wed Dec 23, 2009 10:33 am
Location: Land Of The Long White Cloud


Return to CPU Projects - released FAHCores _a4 & _a7

Who is online

Users browsing this forum: No registered users and 1 guest

cron