[hannk] Add a prepare() method for ops and interp #6338
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This adds a new method to the Interpreter, and to all ops, which allows the interpreter (and each op) to do any one-time preparation for future executions. Previously this was lumped into either the Interpreter's ctor, or the Ops various other methods, but this has some nice advantages at minimal cost: - Since the new prepare() returns an error value, it allows the Interpreter to do sanity checking at startup and return an error to the caller (rather than simply crashing); this makes using it in some runtime environments less painful. - Ops can use this to prep and cache information for multiple subsequent runs; initially, Conv and DepthwiseConv use this to calculate and cache the alignment requirements they need later on. This is unlikely to be a huge performance hit, but it is likely nonzero, and As an added bonus, this means that e.g. the map_bounds() method is no longer susceptible to runtime failures from Halide bounds queries.
dsharletg
approved these changes
Oct 26, 2021
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This adds a new method to the Interpreter, and to all ops, which allows the interpreter (and each op) to do any one-time preparation for future executions. Previously this was lumped into either the Interpreter's ctor, or the Ops various other methods, but this has some nice advantages at minimal cost:
- Since the new prepare() returns an error value, it allows the Interpreter to do sanity checking at startup and return an error to the caller (rather than simply crashing); this makes using it in some runtime environments less painful.
- Ops can use this to prep and cache information for multiple subsequent runs; initially, Conv and DepthwiseConv use this to calculate and cache the alignment requirements they need later on. This is unlikely to be a huge performance hit, but it is likely nonzero, and As an added bonus, this means that e.g. the map_bounds() method is no longer susceptible to runtime failures from Halide bounds queries.