[PROTOTYPE] Inner heuristics refactor #1695
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…oops without turning the kernel cooperative.
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@jjsjann123 we may want this in for 1.12. |
naoyam
reviewed
May 17, 2022
Comment on lines
+26
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+59
| int64_t roundUpPow2OrMultipleOf(const int64_t x, const int64_t multiple) { | ||
| auto round_up_pow2 = scheduler_utils::lastPow2(x); | ||
| if (round_up_pow2 < x) { | ||
| round_up_pow2 *= 2; | ||
| } | ||
| constexpr int64_t kEight = 8; // clang tidy | ||
| auto round_up_8 = x % kEight == 0 ? x : x + (kEight - x % kEight); | ||
| return std::min(round_up_8, round_up_pow2); | ||
| auto round_up_multiple = | ||
| x % multiple == 0 ? x : x + (multiple - x % multiple); | ||
| return std::min(round_up_multiple, round_up_pow2); | ||
| } | ||
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| int64_t safeDiv(const int64_t x, const int64_t y) { | ||
| return x / y == 0 ? 1 : x / y; | ||
| } | ||
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| int64_t clamp(const int64_t val, const int64_t min_val, const int64_t max_val) { | ||
| return std::min(std::max(val, min_val), max_val); | ||
| } | ||
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| // Reduce x, y, z until it's product is less than max value, reduce round robin | ||
| // starting with x | ||
| void reduceProductTo(int64_t& x, int64_t& y, int64_t& z, const int64_t max) { | ||
| TORCH_INTERNAL_ASSERT(max > 1); | ||
| if (x * y * z > max) { | ||
| x = safeDiv(x, 2); | ||
| } | ||
| if (x * y * z > max) { | ||
| y = safeDiv(y, 2); | ||
| } | ||
| if (x * y * z > max) { | ||
| z = safeDiv(z, 2); | ||
| } | ||
| if (x * y * z > max) { | ||
| reduceProductTo(x, y, z, max); | ||
| } |
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Should merge them with those in the reduction scheduler.
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Fixes #ISSUE_NUMBER