jankratochvil added a comment.
In https://reviews.llvm.org/D32167#1026779, @davide wrote:
> Do you have a way of reproducing?
It just happens for me each time - on Fedora 27 x86_64 on 16-core (32HT) 2-node
NUMA machine having env var `MAKEFLAGS=-j32` (and `tuned-adm
throughput-performance` if it matters). Comparing multiple runs makes some
tests {Expected,Unexpected,}{Success,Failure,Error} without changing anything.
> [or even better, investigating]
When the testcase is then ran separately it sure succeeds as the machine then
has no load that time. Maybe one could make some race reproducer helper (such
as was GDB read1 <https://sourceware.org/bugzilla/show_bug.cgi?id=12649>) but I
should analyse more LLDB testsuite races to know the common racy issues in LLDB
testsuite.
https://reviews.llvm.org/D32167
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