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[v2,0/3] KVM: arm64: selftests: arch_timer_edge_cases fixes

Message ID 20250527142434.25209-1-sebott@redhat.com
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Series KVM: arm64: selftests: arch_timer_edge_cases fixes | expand

Message

Sebastian Ott May 27, 2025, 2:24 p.m. UTC 
Some small fixes for arch_timer_edge_cases that I stumbled upon
while debugging failures for this selftest on ampere-one.

Changes since v1: modified patch 3 based on suggestions from Marc.

I've done some tests with this on various machines - seems to be all
good, however on ampere-one I now hit this in 10% of the runs:
==== Test Assertion Failure ====
  arm64/arch_timer_edge_cases.c:481: timer_get_cntct(timer) >= DEF_CNT + (timer_get_cntfrq() * (uint64_t)(delta_2_ms) / 1000)
  pid=166657 tid=166657 errno=4 - Interrupted system call
     1  0x0000000000404db3: test_run at arch_timer_edge_cases.c:933
     2  0x0000000000401f9f: main at arch_timer_edge_cases.c:1062
     3  0x0000ffffaedd625b: ?? ??:0
     4  0x0000ffffaedd633b: ?? ??:0
     5  0x00000000004020af: _start at ??:?
  timer_get_cntct(timer) >= DEF_CNT + msec_to_cycles(delta_2_ms)

This is not new, it was just hidden behind the other failure. I'll
try to figure out what this is about (seems to be independent of
the wait time)..


Sebastian Ott (3):
  KVM: arm64: selftests: fix help text for arch_timer_edge_cases
  KVM: arm64: selftests: fix thread migration in arch_timer_edge_cases
  KVM: arm64: selftests: arch_timer_edge_cases - determine effective counter width

 .../kvm/arm64/arch_timer_edge_cases.c         | 37 ++++++++++++-------
 1 file changed, 24 insertions(+), 13 deletions(-)


base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca