Issues with multisocket system

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tulanebarandgrill
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Joined: Thu Nov 16, 2017 2:57 pm

Issues with multisocket system

Post by tulanebarandgrill »

Hi all,

So I've read here that up to 32 threads per WU is supported.

However I have a bit of an issue.

I have a system with 2 sockets. Each socket has a 22 core CPU. Now if I create two slots, each with 32 threads, they both start on CPU 1 and nothing is running on CPU 0. Any idea what is going on with that ?

If I manually change the CPU affinity in task manager, i can separate them by pause/restart but when a new WU starts it goes back to CPU 1.

Windows 8.1, current FAH Client. Intel CPU and chipset. No GPU.

Are there any advanced instructions for using FAHClient on multisocket systems ?
- TulaneBaG
Neil-B
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3: i7-960@3.20GHz, 12GB DDR3, SSD, Win10 Pro 20H2, GTX 750Ti 2GB, GTX 1080Ti 11GB, FAH 7.6.21
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Re: Issues with multisocket system

Post by Neil-B »

Please post your log including the top 200 or so lines which has the system config info in it) and we can try to help … for guidance on this see viewtopic.php?f=61&t=26036

Usually configuring multisocket systems is relatively simple and shouldn't cause you too much pain - as soon as we know your configuration we should get this sorted quickly.
2x Xeon E5-2697v3, 512GB DDR4 LRDIMM, SSD Raid, W10-Ent, Quadro K420
Xeon E3-1505Mv5, 32GB DDR4, NVME, W10-Pro, Quadro M1000M
i7-960, 12GB DDR3, SSD, W10-Pro, GTX1080Ti
i9-10850K, 64GB DDR4, NVME, W11-Pro, RTX3070

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PantherX
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Intel Core i7-860
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Re: Issues with multisocket system

Post by PantherX »

Please note that standard Windows 8.1 will not support more than 1 physical CPU (https://superuser.com/questions/495105/ ... -8-support). Also, in Windows, behavior is very different with high CPU count (https://www.anandtech.com/show/15483/am ... x-review/3).

Is there a reason you need to you Windows? I would recommend that you switch to Ubuntu/Mint and you can setup CPU folding very easily since you're not folding on GPUs. Here's the breakdown:
2 CPUs with 22 Physical Cores each results in 88 threads with hyperthreading. For F@H, it would be:
CPU Slot 1: 32 CPUs
CPU Slot 2: 32 CPUs
CPU Slot 3: 24 CPUs

If heat becomes an issue, disable hyperthreading so you get a total of 44 CPUs which would result in :
CPU Slot 1: 32 CPUs
CPU Slot 2: 12 CPUs
ETA:
Now ↞ Very Soon ↔ Soon ↔ Soon-ish ↔ Not Soon ↠ End Of Time

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Neil-B
Posts: 2027
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Hardware configuration: 1: 2x Xeon E5-2697v3@2.60GHz, 512GB DDR4 LRDIMM, SSD Raid, Win10 Ent 20H2, Quadro K420 1GB, FAH 7.6.21
2: Xeon E3-1505Mv5@2.80GHz, 32GB DDR4, NVME, Win10 Pro 20H2, Quadro M1000M 2GB, FAH 7.6.21 (actually have two of these)
3: i7-960@3.20GHz, 12GB DDR3, SSD, Win10 Pro 20H2, GTX 750Ti 2GB, GTX 1080Ti 11GB, FAH 7.6.21
Location: UK

Re: Issues with multisocket system

Post by Neil-B »

Which version of 8.1 .. pro or ent will do two cpu systems .. home unfortunately doesn't
2x Xeon E5-2697v3, 512GB DDR4 LRDIMM, SSD Raid, W10-Ent, Quadro K420
Xeon E3-1505Mv5, 32GB DDR4, NVME, W10-Pro, Quadro M1000M
i7-960, 12GB DDR3, SSD, W10-Pro, GTX1080Ti
i9-10850K, 64GB DDR4, NVME, W11-Pro, RTX3070

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FireFox-89
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Re: Issues with multisocket system

Post by FireFox-89 »

I would look into upgrading to Windows 10 Pro, as far as I'm aware although additional research may/will be required it supports 2 sockets and depends on where you look Windows 10 Pro key can be bought cheap from Amazon.
Do you even fold bro?
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MARSTG
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Re: Issues with multisocket system

Post by MARSTG »

Tulane, you solved it ?
MeeLee
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Re: Issues with multisocket system

Post by MeeLee »

Windows Pro does support it; or Linux.
I'm not sure if Windows 10 supports dual die CPUs, but if it does, it will probably be limited to an x-amount of cores (like 32 or so).
Linux is your best bet. It supports up to 4096 CPU cores.
PantherX
Site Moderator
Posts: 7020
Joined: Wed Dec 23, 2009 9:33 am
Hardware configuration: V7.6.21 -> Multi-purpose 24/7
Windows 10 64-bit
CPU:2/3/4/6 -> Intel i7-6700K
GPU:1 -> Nvidia GTX 1080 Ti
§
Retired:
2x Nvidia GTX 1070
Nvidia GTX 675M
Nvidia GTX 660 Ti
Nvidia GTX 650 SC
Nvidia GTX 260 896 MB SOC
Nvidia 9600GT 1 GB OC
Nvidia 9500M GS
Nvidia 8800GTS 320 MB

Intel Core i7-860
Intel Core i7-3840QM
Intel i3-3240
Intel Core 2 Duo E8200
Intel Core 2 Duo E6550
Intel Core 2 Duo T8300
Intel Pentium E5500
Intel Pentium E5400
Location: Land Of The Long White Cloud
Contact:

Re: Issues with multisocket system

Post by PantherX »

MeeLee wrote:...I'm not sure if Windows 10 supports dual die CPUs, but if it does, it will probably be limited to an x-amount of cores (like 32 or so)...
Windows 10 Pro 64- bit has 2 physical CPU support up-to 256 threads: https://answers.microsoft.com/en-us/win ... 23f?auth=1
Windows Server 2019 supports more than 255 threads: https://support.microsoft.com/en-nz/hel ... -rome-proc

I would say that Linux is the easiest with multi-CPU system while Windows can work if you have the right stuff.
ETA:
Now ↞ Very Soon ↔ Soon ↔ Soon-ish ↔ Not Soon ↠ End Of Time

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