# \[Kaggle\] TPUVM doesn't allow setting nprocs \> 1

**URL:** <https://discuss.huggingface.co/t/kaggle-tpuvm-doesnt-allow-setting-nprocs-1/35999>\
**Category:** 🤗Accelerate\
**Created:** [April 9, 2023, 12:30am UTC](https://discuss.huggingface.co/t/kaggle-tpuvm-doesnt-allow-setting-nprocs-1/35999 "2023-04-09T00:30:34Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Neel-Gupta](https://avatars.discourse-cdn.com/v4/letter/n/f1d935/32.png) [@Neel-Gupta](https://discuss.huggingface.co/u/Neel-Gupta)\
**Post date:** [April 9, 2023, 12:30am UTC](https://discuss.huggingface.co/t/kaggle-tpuvm-doesnt-allow-setting-nprocs-1/35999/1 "2023-04-09T00:30:34Z")

</div>

```py
stderr: WARNING:root:Unsupported nprocs (2), ignoring...

```

It seems setting number of processes during `accelerate config` \> 1 causes a cascade of errors. Here’s the config I’m using. `num_processes=1` works without problem:

```shell
compute_environment: LOCAL_MACHINE
distributed_type: TPU
downcast_bf16: 'no'
machine_rank: 0
main_training_function: main
mixed_precision: 'no'
num_machines: 1
num_processes: 2
rdzv_backend: static
same_network: true
tpu_env: []
tpu_use_cluster: false
tpu_use_sudo: false
use_cpu: false

```

To reproduce, simply install `accelerate` and `accelerate test` with this config file on a Kaggle TPUVM 3-8.

Does that mean XLA won’t be able to use all 8 cores, or is there something which I’m missing here?

---

<div class="post-metadata">

**Author:** ![Neel-Gupta](https://avatars.discourse-cdn.com/v4/letter/n/f1d935/32.png) [@Neel-Gupta](https://discuss.huggingface.co/u/Neel-Gupta)\
**Post date:** [April 9, 2023, 12:31am UTC](https://discuss.huggingface.co/t/kaggle-tpuvm-doesnt-allow-setting-nprocs-1/35999/2 "2023-04-09T00:31:58Z")

</div>

Here’s the full error: [E0409 00:24:55.875405434 3803 oauth2\_credentials.cc:236] oauth\_fetch: UNKNOWN:C-are...](https://rentry.co/8g5fh)

Interesting,

```shell
stderr: WARNING:root:Unsupported nprocs (8), ignoring...

```

Does `accelerate` simply not have support for multi-core TPUs? 😁

Also:

```py
E0409 00:58:47.720978217 12750 oauth2_credentials.cc:236] oauth_fetch: UNKNOWN:C-ares status is not ARES_SUCCESS qtype=A name=metadata.google.internal. is_balancer=0: Domain name not found {grpc_status:2, created_time:"2023-04-09T00:58:47.720960775+00:00"}

- `Accelerate` version: 0.18.0
- Platform: Linux-5.4.88+-x86_64-with-glibc2.2.5
- Python version: 3.8.16
- Numpy version: 1.24.2
- PyTorch version (GPU?): 2.0.0+cu117 (False)

```