Comments (3)
Hi @Fhrozen , thanks for trying ChainerMN.
First, which ChainerMN version are you using? (1.3 or master?)
About the issue of NCCL, NCCL is actually a black box library and the error message unhandled system error
does not contain much information. I will discuss it with my colleagues anyways.
On the second issue, please try Open MPI 2.x series (2.1.3 would be a good choice). Open MPI 3.x has a bug on GPU-Direct communication (issue number 3792 on open-mpi/ompi
repository, as indicated in our issue #221 ).
From the error messages on the first line, it seems you use UCX BTL component. The ompi bug is in openib component, so I'm not sure it really fixes the issue, but it worth trying.
Thanks,
Keisuke
from chainermn.
Also, will you try again with the environmental variable NCCL_DEBUG=INFO
?
It is not very useful in many cases, but better than nothing in this case.
Thanks.
Keisuke
from chainermn.
@keisukefukuda Thank you for your support.
I am using the current version from pip 1.3.
I am running now some test with NCCL and MPI to check the full functionallity of the last. I also running some test with Open MPI 2.x. will update you as soon as I get any new information.
from chainermn.
Related Issues (20)
- Don't inicialize global NCCL comm when HOT 2
- Checkpointer doesn't resume current learning rate HOT 8
- Adding allreduce for ndarray HOT 10
- mpirun doesn't exit when exception is thrown in some process HOT 7
- Asynchronous Allreduce HOT 2
- Handle list of dicts in MultiNodeIterator HOT 1
- would you please share hype parameters of GPUs=4 for resnet50 training with us ? HOT 23
- Expose `intra_size`, `inter_rank` and `inter_size` of communicators at readthedocs
- Provide functions for allreduce
- Manual selection for gpus in distributed training HOT 5
- CommunicatorBase.{scatter, allgather} is missing in the document
- Add `force_equal_length` flag to `scatter_dataset` method
- optimizer.setup() created by create_multi_node_optimizer returns an original optimizer HOT 2
- FP16 support HOT 1
- Forcing forkserver spawn earlier HOT 2
- When `in_size=None` is used in `Liner` and it is not used, an error occurs
- CUDA streams usage HOT 6
- Non-Blocking Methodology on ChainerMN HOT 3
- Installation should do nothing but omit a warning.
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