Flaky: NativeLinAlg.inv ComplexFloat returns wrong result on Linux

[devcrocod]

Multik version

0.3.0

Module

multik-openblas

Platform

JVM

Operating System

Linux

Description

NativeLinAlg.inv for ComplexFloat matrices produces incorrect inverse intermittently on Linux (Ubuntu 22.04.5 LTS, gcc-12 12.3.0, JDK 21 Temurin). The test generates an 84x84 random ComplexFloat matrix (seeded with Random(42)), computes its inverse, and verifies A * A_inv = I with epsilon 1e-4f. Failed in 2 out of 4 CI runs.

Reproducer

val a = data.getComplexFloatM(84) // deterministic 84x84 ComplexFloat matrix from Random(42)
val ainv = NativeLinAlg.inv(a)

assertComplexFloatingNDArray(mk.identity(84), NativeLinAlg.dot(a, ainv), 1e-4f) // Fails intermittently

Additional information

Flaky — failed in 2/4 CI runs.
AssertionFailedError at NativeLinAlgTest.kt:344.
CI runs: 22511673326, 22511861936.
Environment: Ubuntu 22.04.5 LTS, gcc-12 (12.3.0), g++-12, JDK 21 Temurin, x86_64.