1922x projects - slow performance

[AgrFan]

I'm seeing 30-40% PPD reduction for the 1922x CPU projects compared to other CPU projects.

Dell Inspiron 3880
i5-10400 (6 cores enabled)
12GB RAM (DDR4 3200, 1x8+1x4, non-matching dual channel)
80GB hard drive (WD800AAJS)
Ubuntu 24.04 LTS

19229 is taking 18 hours to complete for 63K PPD. 19227 and 19228 are taking 14 hours to complete for 80-95K PPD

All other projects running on this machine get close to 100-120K PPD.

Is it normal for the 1922x projects to be this slow? Is it possible they need to be benchmarked again?

19229 looks to be getting dumped repeatedly every day. That doesn't seem good for the science.
https://api.foldingathome.org/project/1 ... ne/0/gen/0

[muziqaz]

Yes, PPD varies between projects.
I swings of up to 1m PPD on my CPUs

[toTOW]

p19229 is indeed below typical PPD on my CPU ...

And don't look at Run 0 / Clone 0 / Gen 0 reports, there's a bug in the work servers that counts all dumped WUs in the project as Run 0 / Clone 0 / Gen 0.

[AgrFan]

Yes, PPD varies between projects.
I swings of up to 1m PPD on my CPUs

I realize PPD varies between projects. It's the percentage that's concerning. 30-40% seems a bit high.

To see if the difference is machine related, I increased cores from 3 to 4 on another Dell machine to pull 192xx work.

Dell Optiplex 7020
i5-4590 (4 cores enabled)
8GB RAM (DDR3 1333, 2x4, matching dual channel)
240GB SATA SSD
Windows 10 Pro

1922x work may be better served being sent to machines with >=8 cores instead of >=4 cores.

[muziqaz]

Yes, PPD varies between projects.
I swings of up to 1m PPD on my CPUs

I realize PPD varies between projects. It's the percentage that's concerning. 30-40% seems a bit high.

To see if the difference is machine related, I increased cores from 3 to 4 on another Dell machine.

Dell Optiplex 7020 with a i5-4590 (4 cores enabled), 8GB RAM (matching dual channel), 240GB SATA SSD, Windows 10 Pro.

1922x work may be better served being sent to machines with >=8 cores instead of >=4 cores.

That will not solve the problem

[AgrFan]

I reduced cores to 3 on the Inspiron to match the Optiplex. Performance is actually better on the Inspiron than the Optiplex. Most probably due to the newer CPU architecture and faster RAM speed. I'm pretty sure the machine configuration is not the culprit.

I guess the 1922x projects are just slow ...

Would it be possible for the researchers to take a look at these units?
19229 - RCG 4510,10,3
19228 - RCG 7128,10,1
19227 - RCG 5387,10,2

Only other thing I can think of is to get another stick of DDR4 3200 RAM so the machine has matching pairs. I had to disable turbo mode to keep temps and noise down. I realize Dell machines are not the greatest folders.

There's a member on my team getting 2-3x PPD than me on 19229 with a i7-10700K CPU (with 6 cores enabled). I would think PPD would be similar between a 10400 and a 10700K with the same number of cores. Maybe that's not the case.

[Joe_H]

The i7-10700K has a higher base clock, 3.8 GHz, than your 10400 at 2.9 GHz. Right there is part of the difference. The bonus formula goes up by an exponential with increasing speed, it is not linear.

As for the difference between it and the Optiplex, there are several generations of improvements to the processor architecture between an i5-4590 and a i5-10400.

[toTOW]

Base credit has been increased to 28800 for p19229. Does it look more in line with your expected PPD ?