There are not enough slots available in the system to satisfy the 8 slots

When I run:
torchpack dist-run -np 8 -v python train.py configs/semantic_kitti/spvcnn/cr0p5.yaml

the system tell me:

--------------------------------------------------------------------------
There are not enough slots available in the system to satisfy the 8 slots 
that were requested by the application:
  python

Either request fewer slots for your application, or make more slots available
for use.

[MEIXuYan]

Hi Haotian, I found that I installed mpich package instead of open-mpi package, which is not perfectly suitable for torchpack, sorry. I reinstall openmpi, torchpack and mpi4py using following shell commands, everything is fine now.

wget https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.5.tar.gz
gunzip -c openmpi-4.0.5.tar.gz | tar xf -
cd openmpi-4.0.5
./configure --prefix=/usr/local --with-orte
sudo make all -j8 install
sudo ldconfig
pip install mpi4py
pip install --upgrade git+https://github.com/zhijian-liu/torchpack.git

Hope this can help someone with the same questions.

Best, Yan Xu

[MEIXuYan]

Hi Haotian, I found that I installed mpich package instead of open-mpi package, which is not perfectly suitable for torchpack, sorry. I reinstall openmpi, torchpack and mpi4py using following shell commands, everything is fine now.

wget https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.5.tar.gz
gunzip -c openmpi-4.0.5.tar.gz | tar xf -
cd openmpi-4.0.5
./configure --prefix=/usr/local --with-orte
sudo make all -j8 install
sudo ldconfig
pip install mpi4py
pip install --upgrade git+https://github.com/zhijian-liu/torchpack.git

Hope this can help someone with the same questions. Best, Yan Xu

Hi Yan Xu, I met the same problem and I do as you mentioned above, and It didn’t work.

Best, Gorzhij

Maybe you can try sudo rm -rf ~/.cache/pip to remove the pip cache, then redo the above pip install commands.