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# Metax Support
## 1. use swift with Metax
you can either build an image or pull an existing one. Here, we demonstrate how to use ms-swift on Metax by pulling a pre-built image as an example.
### 1.1. start ms-swift Container
```bash
docker pull mx-devops-acr-cn-shanghai.cr.volces.com/opensource/public-ai-release/maca/ms-swift:3.10.3-maca.ai3.3.0.16-torch2.6-py310-ubuntu22.04-amd64
# you may modify privileged option and mount only specific GPU cards.
# please refer to our documents on https://developer.metax-tech.com
# Metax GPUs must be mounted via --device=/dev/dri --device=/dev/mxcd
docker run -it --net=host --uts=host --ipc=host --privileged=true --group-add video \
--shm-size 100gb --ulimit memlock=-1 \
--security-opt seccomp=unconfined --security-opt apparmor=unconfined \
--device=/dev/dri --device=/dev/mxcd \
-v /root/workspace:/external \
--name swift_test \
mx-devops-acr-cn-shanghai.cr.volces.com/opensource/public-ai-release/maca/ms-swift:3.10.3-maca.ai3.3.0.16-torch2.6-py310-ubuntu22.04-amd64
```
## 2. Environment check
### 2.1. Check Metax available
Thanks to its compatibility with CUDA, we can use the same approach as NVIDIA to check the availability of Metax devices.
```python
import torch
print(torch.cuda.is_available())
# True
```
### 2.2. Check the P2P connections
```bash
mx-smi topo -m
# output
=================== MetaX System Management Interface Log ===================
Timestamp : Wed Feb 11 16:37:10 2026
Attached GPUs : 8
Device link type matrix
GPU0 GPU1 GPU2 GPU3 GPU4 GPU5 GPU6 GPU7 Node Affinity CPU Affinity
GPU0 X MX MX MX NODE NODE NODE NODE 0 0-31,64-95
GPU1 MX X MX MX NODE NODE NODE NODE 0 0-31,64-95
GPU2 MX MX X MX NODE NODE NODE NODE 0 0-31,64-95
GPU3 MX MX MX X NODE NODE NODE NODE 0 0-31,64-95
GPU4 NODE NODE NODE NODE X MX MX MX 0 0-31,64-95
GPU5 NODE NODE NODE NODE MX X MX MX 0 0-31,64-95
GPU6 NODE NODE NODE NODE MX MX X MX 0 0-31,64-95
GPU7 NODE NODE NODE NODE MX MX MX X 0 0-31,64-95
Legend:
X = Self
SYS = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
PHB = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
PXB = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
PIX = Connection traversing at most a single PCIe bridge
MX = Connection traversing MetaXLink
ETH = Connection traversing Eth
NA = Connection type is unknown
```
### 2.3. check the status of the GPUs
```bash
mx-smi
# output
=================== MetaX System Management Interface Log ===================
Timestamp : Wed Feb 11 09:55:49 2026
Attached GPUs : 8
+---------------------------------------------------------------------------------+
| MX-SMI 2.2.9 Kernel Mode Driver Version: 3.4.4 |
| MACA Version: 3.3.0.15 BIOS Version: 1.30.0.0 |
|------------------+-----------------+---------------------+----------------------|
| Board Name | GPU Persist-M | Bus-id | GPU-Util sGPU-M |
| Pwr:Usage/Cap | Temp Perf | Memory-Usage | GPU-State |
|==================+=================+=====================+======================|
| 0 MetaX C500 | 0 Off | 0000:0e:00.0 | 0% Disabled |
| 57W / 350W | 35C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 1 MetaX C500 | 1 Off | 0000:0f:00.0 | 0% Disabled |
| 58W / 350W | 37C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 2 MetaX C500 | 2 Off | 0000:10:00.0 | 0% Disabled |
| 58W / 350W | 36C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 3 MetaX C500 | 3 Off | 0000:12:00.0 | 0% Disabled |
| 60W / 350W | 35C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 4 MetaX C500 | 4 Off | 0000:35:00.0 | 0% Disabled |
| 57W / 350W | 33C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 5 MetaX C500 | 5 Off | 0000:36:00.0 | 0% Disabled |
| 56W / 350W | 34C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 6 MetaX C500 | 6 Off | 0000:37:00.0 | 0% Disabled |
| 55W / 350W | 34C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
| 7 MetaX C500 | 7 Off | 0000:38:00.0 | 0% Disabled |
| 56W / 350W | 36C P0 | 826/65536 MiB | Available |
+------------------+-----------------+---------------------+----------------------+
+---------------------------------------------------------------------------------+
| Process: |
| GPU PID Process Name GPU Memory |
| Usage(MiB) |
|=================================================================================|
| no process found |
+---------------------------------------------------------------------------------+
```
## 3. run example
We support direct use of the community version. However, we also provide a more optimized version in the image under /workspace and strongly recommend using it.
### 3.1. run swift example
In most scenarios, we can run Swift's examples directly.
```bash
# We assume that the ms-swift code is under /workspace
cd /workspace/ms-swift/
bash examples/train/full/train.sh
```
```bash
# output:
{'loss': 1.47077751, 'grad_norm': 10.5625, 'learning_rate': 2e-06, 'token_acc': 0.65511727, 'epoch': 0.01, 'global_step/max_steps': '1/94', 'percentage': '1.06%', 'elapsed_time': '2s', 'remaining_time': '4m 28s', 'memory(GiB)': 4.87, 'train_speed(iter/s)': 0.345807}
{'loss': 1.58882141, 'grad_norm': 10.75, 'learning_rate': 1e-05, 'token_acc': 0.61763144, 'epoch': 0.05, 'global_step/max_steps': '5/94', 'percentage': '5.32%', 'elapsed_time': '10s', 'remaining_time': '3m 12s', 'memory(GiB)': 5.64, 'train_speed(iter/s)': 0.461462}
{'loss': 1.56617603, 'grad_norm': 12.8125, 'learning_rate': 9.92e-06, 'token_acc': 0.61519274, 'epoch': 0.11, 'global_step/max_steps': '10/94', 'percentage': '10.64%', 'elapsed_time': '20s', 'remaining_time': '2m 52s', 'memory(GiB)': 5.64, 'train_speed(iter/s)': 0.485796}
{'loss': 1.63347206, 'grad_norm': 13.6875, 'learning_rate': 9.69e-06, 'token_acc': 0.60373975, 'epoch': 0.16, 'global_step/max_steps': '15/94', 'percentage': '15.96%', 'elapsed_time': '30s', 'remaining_time': '2m 39s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.493855}
{'loss': 1.60613976, 'grad_norm': 11.0, 'learning_rate': 9.32e-06, 'token_acc': 0.59997221, 'epoch': 0.21, 'global_step/max_steps': '20/94', 'percentage': '21.28%', 'elapsed_time': '39s', 'remaining_time': '2m 27s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.500516}
{'loss': 1.45015478, 'grad_norm': 15.25, 'learning_rate': 8.8e-06, 'token_acc': 0.62373584, 'epoch': 0.27, 'global_step/max_steps': '25/94', 'percentage': '26.60%', 'elapsed_time': '49s', 'remaining_time': '2m 16s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.50548}
{'loss': 1.39427547, 'grad_norm': 13.9375, 'learning_rate': 8.18e-06, 'token_acc': 0.6357994, 'epoch': 0.32, 'global_step/max_steps': '30/94', 'percentage': '31.91%', 'elapsed_time': '59s', 'remaining_time': '2m 5s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.508409}
{'loss': 1.53672237, 'grad_norm': 11.125, 'learning_rate': 7.45e-06, 'token_acc': 0.61650612, 'epoch': 0.37, 'global_step/max_steps': '35/94', 'percentage': '37.23%', 'elapsed_time': '1m 8s', 'remaining_time': '1m 55s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.510425}
{'loss': 1.54039021, 'grad_norm': 13.8125, 'learning_rate': 6.65e-06, 'token_acc': 0.61613974, 'epoch': 0.43, 'global_step/max_steps': '40/94', 'percentage': '42.55%', 'elapsed_time': '1m 18s', 'remaining_time': '1m 45s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.512302}
{'loss': 1.40159426, 'grad_norm': 9.4375, 'learning_rate': 5.79e-06, 'token_acc': 0.64041773, 'epoch': 0.48, 'global_step/max_steps': '45/94', 'percentage': '47.87%', 'elapsed_time': '1m 27s', 'remaining_time': '1m 35s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.512983}
{'loss': 1.54977188, 'grad_norm': 11.9375, 'learning_rate': 4.91e-06, 'token_acc': 0.61078816, 'epoch': 0.53, 'global_step/max_steps': '50/94', 'percentage': '53.19%', 'elapsed_time': '1m 37s', 'remaining_time': '1m 25s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.514489}
{'loss': 1.6754509, 'grad_norm': 13.0625, 'learning_rate': 4.04e-06, 'token_acc': 0.58574393, 'epoch': 0.59, 'global_step/max_steps': '55/94', 'percentage': '58.51%', 'elapsed_time': '1m 46s', 'remaining_time': '1m 15s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.515752}
{'loss': 1.37204351, 'grad_norm': 9.25, 'learning_rate': 3.19e-06, 'token_acc': 0.6391937, 'epoch': 0.64, 'global_step/max_steps': '60/94', 'percentage': '63.83%', 'elapsed_time': '1m 56s', 'remaining_time': '1m 5s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.516829}
{'loss': 1.47697926, 'grad_norm': 11.375, 'learning_rate': 2.4e-06, 'token_acc': 0.62817259, 'epoch': 0.69, 'global_step/max_steps': '65/94', 'percentage': '69.15%', 'elapsed_time': '2m 5s', 'remaining_time': '55s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.517947}
{'loss': 1.4336628, 'grad_norm': 8.125, 'learning_rate': 1.69e-06, 'token_acc': 0.63453862, 'epoch': 0.75, 'global_step/max_steps': '70/94', 'percentage': '74.47%', 'elapsed_time': '2m 14s', 'remaining_time': '46s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.518833}
{'loss': 1.54315252, 'grad_norm': 9.625, 'learning_rate': 1.08e-06, 'token_acc': 0.60202073, 'epoch': 0.8, 'global_step/max_steps': '75/94', 'percentage': '79.79%', 'elapsed_time': '2m 24s', 'remaining_time': '36s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.519627}
{'loss': 1.47180223, 'grad_norm': 9.5625, 'learning_rate': 6e-07, 'token_acc': 0.62211501, 'epoch': 0.85, 'global_step/max_steps': '80/94', 'percentage': '85.11%', 'elapsed_time': '2m 33s', 'remaining_time': '26s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.520284}
{'loss': 1.44068375, 'grad_norm': 10.125, 'learning_rate': 2.5e-07, 'token_acc': 0.62673112, 'epoch': 0.91, 'global_step/max_steps': '85/94', 'percentage': '90.43%', 'elapsed_time': '2m 43s', 'remaining_time': '17s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.520331}
{'loss': 1.44893646, 'grad_norm': 8.375, 'learning_rate': 5e-08, 'token_acc': 0.63837478, 'epoch': 0.96, 'global_step/max_steps': '90/94', 'percentage': '95.74%', 'elapsed_time': '2m 52s', 'remaining_time': '7s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.520707}
{'train_runtime': 183.4332, 'train_samples_per_second': 8.177, 'train_steps_per_second': 0.512, 'train_loss': 1.50650934, 'token_acc': 0.6194337, 'epoch': 1.0, 'global_step/max_steps': '94/94', 'percentage': '100.00%', 'elapsed_time': '3m 3s', 'remaining_time': '0s', 'memory(GiB)': 6.5, 'train_speed(iter/s)': 0.512463}
Train: 100%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 94/94 [03:03<00:00, 1.95s/it]
[INFO:swift] last_model_checkpoint: /workspace/ms-swift/output/v0-20260211-143035/checkpoint-94
[INFO:swift] best_model_checkpoint: None
[INFO:swift] images_dir: /workspace/ms-swift/output/v0-20260211-143035/images
[INFO:swift] End time of running main: 2026-02-11 14:34:09.521336
```
### 3.2. run swift example with Megatron-LM
if you want to use Megatron-LM as Swift's backend, you should set MEGATRON_LM_PATH to /workspace/Megatron-LM-0.15.0 or other versions.
```bash
export MEGATRON_LM_PATH=/workspace/Megatron-LM-0.15.0
cd /workspace/ms-swift
bash examples/megatron/pretrain.sh
```
### 3.3. use other versions of ms-swift
The Metax platform requires the use of MACA-compatible software packages. For instance, compiling depends on torch2.8. We need to use torch2.8+maca3.3.x.x. By default, the installation will overwrite the torch within the environment. Therefore, we recommend using the --no-deps parameter for installation
```bash
git clone -b ${SWIFT_VERSION} https://github.com/modelscope/ms-swift.git
cd ms-swift
pip install . --no-deps
```
After each environment change, the torch and its availability should be checked
```bash
pip list |grep torch
# output:
# torch2.x.x+metax3.x.x.x
```
```python
import torch
torch.cuda.is_available()
```
### 3.4. Differences between Metax and NVIDIA CUDA
We are largely aligned with NVIDIA, but there are some differences in certain software and environment variables.
#### 3.4.1. MACA_MPS_MODE
By default, MACA does not allow multiple processes to run on a single GPU. Therefore, when the GPU is already occupied, you cannot launch another process. To enable this scenario, you need to set MACA_MPS_MODE=1
```bash
# run other scripts ...
export MACA_MPS_MODE=1
cd /workspace/ms-swift/
bash examples/train/full/train.sh
```
#### 3.4.2. MCCL_SOCKET_IFNAME GLOO_SOCKET_IFNAME & MCCL_IB_HCA
When using MACA in a multi-node setup, you need to set the environment variables MCCL_SOCKET_IFNAME, GLOO_SOCKET_IFNAME, and MCCL_IB_HCA to ensure proper inter-node communication.
We can use mx-smi and ifconfig to determine which InfiniBand devices and network device are being used.
```bash
ifconfig
# output
ens20f0np0: xxx
inet: your node ip
xxx
...
```
```bash
mx-smi topo -n
# output
mx-smi version: 2.2.9
=================== MetaX System Management Interface Log ===================
Timestamp : Wed Feb 11 18:53:44 2026
Attached GPUs : 8
Device link type matrix
GPU0 GPU1 GPU2 GPU3 GPU4 GPU5 GPU6 GPU7 NIC0 NIC1 NIC2 NIC3 NIC4 NIC5 Node Affinity CPU Affinity
GPU0 X MX MX MX NODE NODE NODE NODE PIX PIX NODE NODE SYS SYS 0 0-31,64-95
GPU1 MX X MX MX NODE NODE NODE NODE PIX PIX NODE NODE SYS SYS 0 0-31,64-95
GPU2 MX MX X MX NODE NODE NODE NODE PIX PIX NODE NODE SYS SYS 0 0-31,64-95
GPU3 MX MX MX X NODE NODE NODE NODE PIX PIX NODE NODE SYS SYS 0 0-31,64-95
GPU4 NODE NODE NODE NODE X MX MX MX NODE NODE PIX PIX SYS SYS 0 0-31,64-95
GPU5 NODE NODE NODE NODE MX X MX MX NODE NODE PIX PIX SYS SYS 0 0-31,64-95
GPU6 NODE NODE NODE NODE MX MX X MX NODE NODE PIX PIX SYS SYS 0 0-31,64-95
GPU7 NODE NODE NODE NODE MX MX MX X NODE NODE PIX PIX SYS SYS 0 0-31,64-95
NIC0 PIX PIX PIX PIX NODE NODE NODE NODE X PIX NODE NODE SYS SYS
NIC1 PIX PIX PIX PIX NODE NODE NODE NODE PIX X NODE NODE SYS SYS
NIC2 NODE NODE NODE NODE PIX PIX PIX PIX NODE NODE X PIX SYS SYS
NIC3 NODE NODE NODE NODE PIX PIX PIX PIX NODE NODE PIX X SYS SYS
NIC4 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS X PIX
NIC5 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS PIX X
Legend:
X = Self
SYS = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
PHB = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
PXB = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
PIX = Connection traversing at most a single PCIe bridge
MX = Connection traversing MetaXLink
ETH = Connection traversing Eth
NA = Connection type is unknown
NIC Legend:
NIC0: mlx5_0
NIC1: mlx5_1
NIC2: mlx5_2
NIC3: mlx5_3
NIC4: mlx5_4
NIC5: mlx5_5
# The output shows:
# 1. GPU0 to GPU3 communicate with NIC0 and NIC1, while GPU4 to GPU7 communicate with NIC2 and NIC3
# 2. NIC0 uses ib device:mlx5_0, NIC1 uses ib device:mlx5_1, NIC2 uses ib device:mlx5_2, NIC3 uses ib device:mlx5_3
```
Therefore:
MCCL_SOCKET_IFNAME=ens20f0np0
GLOO_SOCKET_IFNAME=ens20f0np0
MCCL_IB_HCA=mlx5_0,mlx5_1,mlx5_2,mlx5_3
```bash
# node 1
export MCCL_SOCKET_IFNAME=ens20f0np0
export GLOO_SOCKET_IFNAME=ens20f0np0
export MCCL_IB_HCA=mlx5_0,mlx5_1,mlx5_2,mlx5_3
cd /workspace/ms-swift/
bash examples/train/multi-node/torchrun/train_node1.sh
```
```bash
# node 2
# Update the value of the master_addr parameter in the script.
export MCCL_SOCKET_IFNAME=ens20f0np0
export GLOO_SOCKET_IFNAME=ens20f0np0
export MCCL_IB_HCA=mlx5_0,mlx5_1,mlx5_2,mlx5_3
cd /workspace/ms-swift/
bash examples/train/multi-node/torchrun/train_node2.sh
```