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[GH-ISSUE #3711] CUDA malloc fails on newly supported models in 0.1.32 (dual-GPU setup with 72GB VRAM and 128GB RAM) #48796
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opened 2026-04-28 09:16:53 -05:00 by GiteaMirror
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Reference: github-starred/ollama#48796
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Originally created by @mz2 on GitHub (Apr 17, 2024).
Original GitHub issue: https://github.com/ollama/ollama/issues/3711
Originally assigned to: @dhiltgen on GitHub.
What is the issue?
I am getting cuda malloc errors with v0.1.32 (as well as with the current head of main branch) when trying any of the new big models: wizardlm2, mixtral:8x22b, dbrx (command-r+ does work) with my dual GPU setup (A6000 + RTX 3090, i.e. combined 72GB VRAM) with a 24-core 13th gen Intel CPU (128GB of DDR5 on the system).
The symptoms are similar, with llama-cpp dying
From the service logs I see:
When watching nvidia-smi (
watch nvidia-smi) I see that the GPU 0 (the A6000) gets its memory nearly fully allocated, before the malloc failure begins.OS
Linux
GPU
Nvidia
CPU
Intel
Ollama version
0.1.32 (or current head of main branch)
@elabeca commented on GitHub (Apr 18, 2024):
I have the same issue with NVIDIA driver version: 535.171.04, CUDA Version 12.2, and 2 x RTX 4090.
Upgraded to 545.29.06, CUDA Version 12.3, it worked, then rebooted and it failed again with the following message:
@nkeilar commented on GitHub (Apr 18, 2024):
I'm getting similar messages with dual 3090 cards
@one-bit commented on GitHub (Apr 18, 2024):
I'm getting the same error. I'm running ollama 0.1.32 on Linux. I have a RTX 4090 and a GTX 1080 TI, and 128 GB of DDR4 RAM, and an Intel Core i9-7980XE with 18 cores/36 threads.
ollama run wizardlm2:8x22b-q2_K
ollama --version
nvidia-smi
screenfetch
@s00x3r commented on GitHub (Apr 18, 2024):
same Error: llama runner process no longer running: 1 error:failed to create context with model '/usr/share/ollama/.ollama/models/blobs/sha256-cfcf93119280c4a10c1df57335bad341e000cabbc4faff125531d941a5b0befa'
@MarkWard0110 commented on GitHub (Apr 18, 2024):
I'm getting the same error with the new models.
Intel Core i9 14900k
DDR5 6400 2x48GB (96GB)
Nvidia RTX 4070 TI Super 16GB
@KolioM commented on GitHub (Apr 19, 2024):
I have the exact same issue on both WIndows and Linux using two 3090, latest driver...
@s00x3r commented on GitHub (Apr 19, 2024):
Running not in virtual machine: also cpu have
from /proc/cpuinfo
flags :avx avx2
@KolioM commented on GitHub (Apr 19, 2024):
Btw llama 3 70b is running smoothly,
it is only Mixtral 8x22b models.
@s00x3r commented on GitHub (Apr 21, 2024):
FOUND PROBLEM!
Then ollama start model 8x22b with this it works( pay attension the only difference in this parameter (--n-gpu-layers)
working(also if i start --n-gpu-layers 25 working etc) :
ollama[547518]: time=2024-04-21T10:20:54.906+03:00 level=INFO source=server.go:264 msg="starting llama server" cmd="/tmp/ollama1719319998/runners/cuda_v11/ollama_llama_server --model /usr/share/ollama/.ollama/models/blobs/sha256-cfcf93119280c4a10c1df57335bad341e000cabbc4faff125531d941a5b0befa --ctx-size 2048 --batch-size 512 --embedding --log-disable --n-gpu-layers 23 --port 4123"
not working
ollama[547518]: time=2024-04-21T10:11:26.056+03:00 level=INFO source=server.go:264 msg="starting llama server" cmd="/tmp/ollama1719319998/runners/cuda_v11/ollama_llama_server --model /usr/share/ollama/.ollama/models/blobs/sha256-cfcf93119280c4a10c1df57335bad341e000cabbc4faff125531d941a5b0befa --ctx-size 2048 --batch-size 512 --embedding --log-disable --n-gpu-layers 33 --port 30935"
@mz2 commented on GitHub (Apr 21, 2024):
Nice, same story here: in my case the cuda malloc fail inducing command that I see with mixtral:8x22b is, as extracted from the log:
The same command happily runs if I reduce just 1 layer from the GPU offload:
--n-gpu-layers 50runs happily. Deducting 1 from ollama's estimate for the # of layers appears to be enough to get also dbrx, wizardlm2 running on my dual-GPU setup withcuda_v12-- I also confirmed this with a local build of ollama where I did this:(Also, unsurprisingly I can also see that the CPU based library is not affected, i.e.
OLLAMA_LLM_LIBRARY="cpu_avx2"ollama run mixtral:8x22b also works around the issue.)@one-bit commented on GitHub (Apr 21, 2024):
In my case, I was able to work around the issue by creating a custom
Modelfilewith a custom value for thenum_gpuparameter, to limit the number of layers that can fit into my GPUs VRAM. I started with a value of 10 and increased it until it crashed again, then I kept the last value that worked (in my case 18).Here's my custom
Modelfile:Then I created a new model entry in
ollamausing thisModelfile:And finally I was able to load the model using:
Please note that this does not fix the issue per se, but it may be a temporary workaround if you really want to run/test these models.
@nkeilar commented on GitHub (Apr 24, 2024):
This is what worked for me with a dual 3090 setup, and 14900k. Note I limited the context to something quite short as a proof of concept. Response tokens 8.6 tok/sec
@plp38 commented on GitHub (May 23, 2024):
Thank you, the 'num_gpu' paramater solved my issue with my GPU. However what does it mean to limit the number of layers, what is the impact ? Sorry for the stupid question, but are the others layers loaded in RAM ?
@one-bit commented on GitHub (May 28, 2024):
This parameter limits the number of model layers that can be loaded into the GPU VRAM (and processed by the GPU), the remaining layers in the model will be loaded into the computer's RAM (and processed by the CPU).
@dhiltgen commented on GitHub (Jun 1, 2024):
Can you see if the latest release has improved the situation on the larger mixtral models?
@dhiltgen commented on GitHub (Jun 22, 2024):
The latest release (0.1.45) has improvements around mult-GPU prediction and layer splits which should help these situations. If you're still seeing OOM's after upgrading, please share an updated server log and I'll reopen the issue.