graph: backend: dnnl: fix nthr in decomp kernels under threadpool rt#5337
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Need proper nthr for scratchpad size estimation.
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ElaineBao
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Properly get the number of thread (
nthr) under threadpool runtime, which is needed to estimate the scratchpad size for decomposition kernels.Previously,
nthrwas queried during execution time and used for internal scratchpad allocation and parallel-for.Now with the fix,
nthris queried during compilation time and used for scratchpad size estimation. It's stored and used for parallel-for during execution time.