Posts in this category: 4
Std.math exp disagreed between the CPU and the GPU on 19,437 of 40,017 inputs. A shared exp written with explicit fma matched on all 40,017, at 3.6 times the cost in an exp-bound kernel. One attention layer then matched bit for bit, and a float Freivalds certificate caught every planted fault.
ReadMojo has no ray-tracing API, yet a 20-line probe emits image_bvh_intersect_ray for gfx1100. The probe is compile only, with an all-zero descriptor and one component set, so it proves reachability and nothing more.
Read40.0 GB read and 15.9 GB written per launch is 59 to 87 percent of the card's bandwidth, depending on which clock mode you trust. By the review's estimate the biggest items are repeated reads of factors and vectors, not the Jacobian we blamed.
ReadSquare GEMM is the benchmark everyone runs; decode is M=1 streaming weights out of HBM. Four frozen rounds, three wrong predictions, and a one-percent win that came from occupancy relief rather than fewer bytes.
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