[llvm-bugs] [Bug 48918] New: check-llvm hangs with 12.0.0-rc1 while spawning llvm-exegesis

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48918

            Bug ID: 48918
           Summary: check-llvm hangs with 12.0.0-rc1 while spawning
                    llvm-exegesis
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: mgorny at gentoo.org
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org
            Blocks: 48902

I'm going to try to debug it shortly.  Long story short, llvm-lit spawns
llvm-exegesis and nothing happens afterwards.  The process doesn't utilize any
CPU, so I suspect it's waiting for something.


1006397 pts/5    S+     0:01 /usr/bin/python3.9
/var/tmp/portage/sys-devel/llvm-12.0.0_rc1/work/llvm-12.0.0_rc1_build-abi_x86_64.amd64/./bin/llvm-lit
-vv -j 12
/var/tmp/portage/sys-devel/llvm-12.0.0_rc1/work/llvm-12.0.0_rc1_build-abi_x86_64.amd64/utils/lit
/var/tmp/portage/sys-devel/llvm-12.0.0_rc1/work/llvm-12.0.0_rc1_build-abi_x86_64.amd64/test
1006476 pts/5    S+     0:00
/var/tmp/portage/sys-devel/llvm-12.0.0_rc1/work/llvm-12.0.0_rc1_build-abi_x86_64.amd64/bin/llvm-exegesis
-mode latency -x86-lbr-sample-period 123 -repetition-mode loop -snippets-file
/dev/null


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=48902
[Bug 48902] [meta] 12.0.0 Release Blockers
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