i am building a multi-gpu system (3 cards gtx 1070, 8gb) on threadripper-platform. but i want that gpugrid can use 2 of the cards for this project. 3rd card should left alone, so no gpugrid on 3rd card at all.

how to configure this in boinc? plz, when you are refering to app_info.xml to adjust it, plz post a full text of it so that i only need to copy-paste it. because i am totall noob about coding.

i am running windows 10 (64bit with 16gb ram, nvme ssd), swan_sync is set to 1 (enabled)

I'm pretty sure you can't do that in the app_info. More than likely you will need to make a cc_config using the options command and exclude in the options section. Normally you would also need a app section but think you might be able skip that and exclude all work. Not 100 on that part. I know in the past I could exclude specific work units I didn't want on a GPU from different project this way.

You will need to experiment with this and see if it works for you. To make a xml file open notepad, paste the following in it. When you go to save (AND THIS IS IMPORTANT) make sure to select SAVE AS. Not just SAVE. Once the new window opens up, change save type to *.* not the .txt that it wants to default to. Then type in cc_config.xml It may give you an argument about using the .xml rather than .txt Tell it yes, you do want to use .xml and not .txt If it saves it as cc_config.xml.txt BOINC will not read it and it will be ignored. Move it to the BOINC folder not the GPUGrid project folder. It has to be higher up in order for BOINC to read it. You will need to restart BOINC as well as just running re-read config files will not do the trick. Good luck

The original cc_config.xml looks like the following. I only included it in case you need the app section. You would need one for each application if it doesn't like the above.

<cc_config>
<options>
<exclude_gpu>
<url>http://www.gpugrid.net/</url>
<device_num>2</device_num>
<app></app>
</exclude_gpu>
<exclude_gpu>
<url>http://www.gpugrid.net/</url>
<device_num>2</device_num>
<app></app>
</exclude_gpu>
</options>
</cc_config>

my cc_config.xml file i have created a while ago to use 2 gpu's in my 2nd computer, with <use all gpu> 1. should i remove this part at all from cc_config? or should i adjust 1 => 0.66 (percentile)? having 3 cards, using 2 for boinc (2/3= 0.66)?

next question....i would like to understand why i need <app> section in your 2nd coding? my 3rd system (this topic is about it) is dedicated to run 2 projects:
world comunnity grid (only cpu usage)
and gpugrid (only gpu usage)

if i do need <app> section, can i put there acemdlong as the name of app?

You use how BOINC numbers the card in the Event Log startup to determine which card is 0,1,2. That numbering scheme is how you define the gpu_exclude statement in cc_config.xml. You can skip the app section. Just the project url that needs a specific gpu # excluded and the <device_num> definition.

You use how BOINC numbers the card in the Event Log startup to determine which card is 0,1,2. That numbering scheme is how you define the gpu_exclude statement in cc_config.xml. You can skip the app section. Just the project url that needs a specific gpu # excluded and the <device_num> definition.

<exclude_gpu>
<url>http://www.gpugrid.net/</url>
<device_num>0</device_num>
<type>NVIDIA</type>
</exclude_gpu>

.

<exclude_gpu>
<url>http://www.gpugrid.net/</url>
<device_num>0</device_num>
<type>NVIDIA</type>
</exclude_gpu>

Boinc is right now running on the 2nd card via x8-slot, I can see this with gpu-z because this card is loaded for 90%.

thanks for your reply.
i was wondering if there is some logical way of thinking or numbering about pci-devices regarding boinc. boinc is running on 2nd gpu in x8-slot (pcie-bus 65 according windows 10 device manager). my 1st gpu is in first pcie-slot x16 (pcie-bus 9). one should expect that firstly pcie-bus 9 should be loaded in boinc. this is why i was wondering about the logical thinking of boinc

That I can not answer. Might ask RIchard or Keith as they seem familiar as to how BOINC is compiled to run.

event log of boinc? or event log of windows itself?

event log of boinc? or event log of windows itself?

The Event Log of BOINC is how the cards are numbered for the gpu_exclude device number.

how to manage this when you have 4 of the same cards?

how to manage this when you have 4 of the same cards?

Now that I can answer. I decide beforehand how many cards I want to run on this project and just assign them a number. Since they are all the same and the PCIe slots are all the same, it's not a hard choice. But I'm betting most of your motherboard's slots are not PCIex16 or x8. In which case, you will have to experiment with the numbering and see what number corresponds to which GPU.

event log of boinc? or event log of windows itself?

The Event Log of BOINC is how the cards are numbered for the gpu_exclude device number.

did you see my event log of boinc?
i have 2 of the same gpu, excatly the same names. same factory, same memory.

now i can mamage which card to exclude because i now have 2 gpu, this is now easy.

how to manage this when you have 4 of the same cards?

event log of boinc? or event log of windows itself?

The Event Log of BOINC is how the cards are numbered for the gpu_exclude device number.

did you see my event log of boinc?
i have 2 of the same gpu, excatly the same names. same factory, same memory.

now i can mamage which card to exclude because i now have 2 gpu, this is now easy.

how to manage this when you have 4 of the same cards?

That becomes more difficult. You then have to ID the card by the PCIe BusID number or the UUID which is an even better way as that number is unique to every card like a fingerprint.

You can use the nvidia-smi with the -L parameter to show the UUID of a card.
nvidia-smi is located at C:\Program Files\NVIDIA Corporation\NVSMI in Windows.

nvidia-smi -L
GPU 0: GeForce GTX 1070 (UUID: GPU-e25636cc-94d1-42ca-9b31-6e0018dfedd6)
GPU 1: GeForce RTX 2080 (UUID: GPU-089608fe-cba5-4711-bf68-085fd0711d8c)
GPU 2: GeForce GTX 1080 (UUID: GPU-2d04c292-2286-8b37-d8b8-c01f67e752fd)

To figure out which 1070 is which you could always resort to the "finger test" IOW stop a card's fan so that your monitoring software shows some card's fan speed drop to zero. Then you know which 1070 is which.

From what I can gather, BOINC numbers the cards based on highest performance. So a RTX 2080 is numbered as Device 0 and then a GTX 1080 is numbered as Device 1 and then a GTX 1070 is numbered as Device 2.

When you have identical cards, then I think BOINC numbers the cards according to lowest PCIe BusId. So PCIe BusID 5 is Device 0, BusID 6 is Device 1 and BusID 9 is Device 2. That is how my 3 identical GTX 1070 Ti get numbered.

Simply: Bionc manager is overmatured undeveloped software where we can not:
ADD project per cpu core ---
ADD project per gpu ---in simple GUI

In todays 21.C is using appinfo and cc_config like using https://en.wikipedia.org/wiki/Punched_tape )) just in electronics form we dont use paper but we must use that app and cc.. witch is not user friendly and dificult for normal users and they think this manipulation in OS folders and adding this app/cc is "hacking" ..)) ..noobs are hapy but this will not get more people to boinc.
Why anderson dont use other people to develop boinc manager?? like in mobile OS where all mobile OS make big steps in last years, we use 15 years old boinc manager.
I think it will not better in future as i can see here:
[url]https://boinc.berkeley.edu/trac/wiki/ProjectMain [/url]

Simply: Bionc manager is overmatured undeveloped software where we can not:
ADD project per cpu core ---
ADD project per gpu ---in simple GUI

Thats probably easier to do for a Program that runs 1 single project, like FAH, but more complicated for the general user with multiple projects.

OMG people ask for this "feature" from first days of seti project....you can find in waybackmachine
Simply "you not abble for 20 years "delivering" something.. becouse there is problem with , berkeley infrastructure read your computer like "host" , whole host, and this segmenting" on cpu core,gpu core is "unreadable" for them.. but in modern era it can be do it over java for exemple,not very best but will work
Also some boinc project managers dont like becouse they will more benefit from your whole host PC , than like only few cores...)
sorry for off topic , but on boinc page is this problem ignored yeaars

a little update how device numbering in boinc is.
boinc sees multi-gpu setup the same way as gpu-z sees.

under ADVANCED tab you have option called CUDA, under CUDA you can see MULTI BOARD and then No (0) or No (1) etc etc. those device numbers in gpu-z are the same device numbers in boinc. and THIS numbering is done according to PCIE BUS ID. lower PCIE ID gets lower device number. you should say: of course, nothing strange or news with this.

now comes strange part....my motherboard asrock x399 taichi (for threadripper cpu's) has the following pcie-slots, counting from the pcie-slot most nearby cpu and memory banks:

- x16 electrial (pcie bus id 66)
- x16 slot (eletrical x8, pcie bus id 66)
- x1 slot electrical (pcie bus id 7)
- x16 electrical (pcie bus id 10)
- x16 slot (electrical x8, pcie bus id 9)

according to this pcie bus id's my device 0 in boinc and in gpu-z is x1-slot.

all this information is just for sharing.
i am not asking why 1st pcie-slot (most nearby cpu and memory banks) has the highest pcie bus id. but just sharing my experience.

oh yeah, forgotten to say.....swan_sync enabled under windows 10, tried with different gtx-cards (1060 and 1070), alsways multi-gpu in alls the same gtx-cards or all mixed gtx-cards.

so, i am saying: the card type has nothing to do with pcie bus id numbering

have fun !!!

another question....rigth now i am testing gtx 1080 Ti card. its load is about 50%. this card is connected to pcie-x8 slot. is this normal for 1080 Ti? 50% load of gpu?

if it is not, is it possible to sign specific app (acemdlong or acemdshort) to this specific card? and then using gpu_usage 0.5 comment to load 2 WU on this card so it finally get almost 100% gpu load?

another question....rigth now i am testing gtx 1080 Ti card. its load is about 50%. this card is connected to pcie-x8 slot. is this normal for 1080 Ti? 50% load of gpu?

another question....rigth now i am testing gtx 1080 Ti card. its load is about 50%. this card is connected to pcie-x8 slot. is this normal for 1080 Ti? 50% load of gpu?

Did you enable SwanSync ?

meaning...i would like to asign gtx1080 Ti to only acemdlong-app. is this possible?

meaning...i would like to asign gtx1080 Ti to only acemdlong-app. is this possible?

No, but you can exclude a GPU from a project.
See the <exclude_gpu> section here.

meaning...i would like to asign gtx1080 Ti to only acemdlong-app. is this possible?

No, but you can exclude a GPU from a project.
See the <exclude_gpu> section here.

thanks for your reply. pitty i cann't asign specific device to specific application with specific setting for that device or appliction....would be great feature of BOINC

meaning...i would like to asign gtx1080 Ti to only acemdlong-app. is this possible?

No, but you can exclude a GPU from a project.
See the <exclude_gpu> section here.

thanks for your reply. pitty i cann't asign specific device to specific application with specific setting for that device or appliction....would be great feature of BOINC

That is low GPU util even w/o swan sync.

The best way to use 1 GPU on one project and a 2nd GPU on another project is with separate BOINC Clients with the exclude function mentioned above. I have a guide for Windows and Linux at Overclock.net in the BOINC Guide sub forum if you're interested. My PCs with GPUs all have 1 client for CPU work and another for GPUs. It allows for finer control of work buffers, esp during competitions.

meaning...i would like to asign gtx1080 Ti to only acemdlong-app. is this possible?

No, but you can exclude a GPU from a project.
See the <exclude_gpu> section here.

thanks for your reply. pitty i cann't asign specific device to specific application with specific setting for that device or appliction....would be great feature of BOINC

That is low GPU util even w/o swan sync.

The best way to use 1 GPU on one project and a 2nd GPU on another project is with separate BOINC Clients with the exclude function mentioned above. I have a guide for Windows and Linux at Overclock.net in the BOINC Guide sub forum if you're interested. My PCs with GPUs all have 1 client for CPU work and another for GPUs. It allows for finer control of work buffers, esp during competitions.

so, i have read your guide for 2nd client setup.

what you actually suggest is in 1 client to exclude gtx1070 and include gtx1080 with setting like i wish.

in another client (2nd client) to do the opposite...do i understand you correct?

because you make 2 folders for boinc:
C:\ProgramData\BOINC

C:\ProgramData\BOINC2