Fix EPContext node referencing MXR files that are never written - #69
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…tten When ep.context_enable was set without cache_dir (or with disable_caching), the generated EPContext node referenced/embedded a .mxr file that the EP never actually saved to disk, breaking the model on load. Default the cache directory to context_file_path's or the model's directory in that case, always persist the .mxr when context_enable is on, and fail fast instead of emitting a broken node when the graph has dynamic input shapes.
urpetkov-amd
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Jul 29, 2026
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LGTM |
TedThemistokleous
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Jul 30, 2026
TedThemistokleous
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Overall looks good just need to update comment to represent new state regarding the added dynamic batch functionality using the ORT flags
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When ep.context_enable was set without cache_dir (or with disable_caching), the generated EPContext node referenced/embedded a .mxr file that the EP never actually saved to disk, breaking the model on load. Default the cache directory to context_file_path's or the model's directory in that case, always persist the .mxr when context_enable is on, and fail fast instead of emitting a broken node when the graph has dynamic input shapes.
Is defaulting to the original model's directory (rather than erroring out) the right last resort, or should we require the user to set at least one of cache_dir/context_file_path explicitly when context_enable=1?
Should context_enable=1 on a dynamic-input-shape graph hard-fail?
NOTE : need to retest if everything else stays unchanged before merge