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try execution::par_unseq for inhibition in SP. Results: takes much longer than seq.
This reverts commit b27b40c.
breznak
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Jul 17, 2019
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Please review if there's an obvious error or if the MNIST_SP.cpp settings may be too artificial.
Otherwise my parallelization effort using c++17 TS Parallel has hit the reality.
- The problem is memory bound
execution::par_unseqreally puts all threads to a good use- MNIST is still slower than single-thread!
- significantly: 60s (single) vs 240+s (parallel)
- likely broken cache locality
- or even CPU throttling (or boosting the only signle thread running)
| // the Nth element. | ||
| std::nth_element( | ||
| tNth.start(); | ||
| std::nth_element(htm::parallel::mode, |
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inhibition identified as one of the slowest methods in SP.
nth_element as the most significant in global inh.
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parallel TSFor #214 #254
This is for your interest, not intended for merging yet.