Posted on February 12, 2022February 12, 2022 by vickieGPTIOMMU conflicts with NCCL When we are running DeepMD on our machines, we encountered that NCCL will stuck for multicard communication. We consult on this link & this link and disable both SVM and IOMMU resolve the problem Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)MoreClick to share on WhatsApp (Opens in new window)Click to print (Opens in new window)