Add SPMD types in TorchTitan devlog - #40
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tianyu-l
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Aug 28, 2026
aditvenk
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Aug 28, 2026
| | --- | --- | ---: | ---: | --- | | ||
| | Llama 3, FSDP=4, TP=2 | Eager | 47,393 | 67,777 | **+43.0%** | | ||
| | Llama 3, FSDP=4, TP=2 | Eager + CUDA graphs | 235,810 | 255,280 | **+8.3%** | | ||
| | Llama 3, FSDP=4, TP=2 | Compile (`inductor`) | 104,738 | 120,154 | **+14.7%** | |
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@pianpwk -- how do we see this big perf improvement in this case? I'd think inductor compilation removes any Dtensor overhead.
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I updated, we still see more overhead that inductor doesn't remove because compile is regional; in this case chunked loss wrapper isn't compiled, only inner loss fn
fegin
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Aug 29, 2026
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