On Mon, Jan 19, 2026 at 05:55:03PM -0800, Stephen Hemminger wrote: > This series addresses several test failures that occur sporadically on > systems with many cores (32+), particularly on AMD Zen architectures. > I think Ferruh may have addressed similar problems in earlier > releases. > > The root causes fall into three categories: > > 1. Missing rte_pause() in synchronization spinloops (patch 1) > Tight spinloops without pause cause SMT thread starvation and > unpredictable timing behavior. > > 2. Fixed iteration counts that don't scale (patch 2) > The atomic test performs 1M iterations per worker regardless of > core count. With 32+ cores, contention causes timeout failures. > Testing on a 96-core part, I still see timeouts (with -t2, so 20-second allowed) in mcslock, stack, stack_lf and timer tests. Limiting core counts for those makes the failures go away, so it's likely the same issue as you solved here.
/Bruce
