[PATCH v4 00/11] test: fix test failures on high core count systems

[Stephen Hemminger]

Fix several test infrastructure issues affecting high core count systems.

Add rte_pause() to synchronization spinloops that starve SMT sibling
threads on AMD Zen systems. Scale iteration counts inversely with core
count via a new test_scale_iterations() helper to prevent timeouts
from lock contention (atomic, mcslock, stack, timer_secondary tests).

Replace volatile variables with C11 atomics in timer_secondary, fix
parallel test execution by restoring unique file-prefix for fast-tests
on Linux, and fix BPF ELF load test error handling and clang 20+
compatibility.

v4 - drop patches already covered elsewhere
   - replace volatile with C11 atomics in timer secondary test
   - add missing mempool_get error check in timer secondary test
   - move iteration scaling out of worker function in stack test


Stephen Hemminger (11):
  test: add pause to synchronization spinloops
  test/atomic: scale test based on core count
  test/mcslock: scale test based on number of cores
  test/stack: scale test based on number of cores
  test/timer: scale test based on number of cores
  test/timer: replace volatile with C11 atomics
  test: add file-prefix for all fast-tests on Linux
  test: fix trace_autotest_with_traces parallel execution
  test/bpf: fix error handling in ELF load tests
  test/bpf: fix unsupported BPF instructions in ELF load test
  test/bpf: pass correct size for Rx/Tx load tests

 app/test/bpf/meson.build        |  3 +-
 app/test/suites/meson.build     | 19 +++++++---
 app/test/test.h                 | 19 ++++++++++
 app/test/test_atomic.c          | 66 +++++++++++++++++++--------------
 app/test/test_bpf.c             |  7 ++--
 app/test/test_mcslock.c         | 10 +++--
 app/test/test_stack.c           | 11 ++++--
 app/test/test_threads.c         | 17 +++++----
 app/test/test_timer_secondary.c | 45 ++++++++++++++--------
 9 files changed, 131 insertions(+), 66 deletions(-)

-- 
2.51.0