search

Quuxplusone / LLVMBugzillaTest

0 stars 0 forks source link

omp_taskwait test tends to hang NetBSD buildbot through tstiles #40990

Open Quuxplusone opened 5 years ago

Quuxplusone commented 5 years ago
Bugzilla Link PR42020
Status NEW
Importance P normal
Reported by Michał Górny (mgorny@gentoo.org)
Reported on 2019-05-25 11:52:10 -0700
Last modified on 2019-06-21 10:42:48 -0700
Version trunk
Hardware PC NetBSD
CC a.bataev@hotmail.com, htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, terry.l.wilmarth@intel.com
Fixed by commit(s)
Attachments
Blocks
Blocked by
See also

Our sysadmin has reported that the machine running buildbot for NetBSD has been effectively hanged by lots of processes waiting for a turnstile lock. Apparently the cause are runaway omp_taskwait processes. I'm going to investigate more.

Quuxplusone commented 5 years ago 
I see two tests deadlocked:

13409 ?     Ol   2194:49.92
/data/motus/netbsd8/netbsd8/build/projects/openmp/runtime/test/tasking/Output/omp_taskloop_num_tasks.c.tmp
(omp_tasklo
19736 ?     Ol   1629:58.64
/data/motus/netbsd8/netbsd8/build/projects/openmp/runtime/test/tasking/Output/omp_taskwait.c.tmp
(omp_taskwait.c.t)