[Valgrind-users] Memcheck in Valgrind 3.8.1 hanging

[David C. <dc...@gm...>]

Hi,

I've got an issue with memcheck in Valgrind 3.8.1 hanging.  I've left
processes running for weeks or even months but they don't complete
(normally these processes run in a few minutes tops, and they were working
fine with memcheck until a while ago.

Has anyone seen anything like this before?  Here are the details:

options:

--quiet --track-origins=yes --free-fill=7a --child-silent-after-fork=yes
--fair-sched=no --log-file=/path/to/log
 --suppressions=/path/to/suppression.file



strace shows:

Process 5223 attached - interrupt to quit

read(1027,



system details:

$ uname -a

Linux HOSTNAME 2.6.18-194.3.1.el5 #1 SMP Sun May 2 04:17:42 EDT 2010 x86_64
x86_64 x86_64 GNU/Linux



$ cat /etc/redhat-release

Red Hat Enterprise Linux Server release 5.5 (Tikanga)





Top shows:

                732 USER   25   0 2396m 1.6g 110m S 99.8  3.5  86263:19
memcheck-amd64-


25100 USER   25   0 2498m 1.7g 112m S 99.8  3.6  86272:55
memcheck-amd64-



Ps shows pipe wait in WCHAN:

                0 S nbezj7v  25100  1864 98  85   0 - 639685 pipe_w 2013
?        59-22:03:14 /path/to/valgrind options



Have seen it also hang on fast mutexes – i.e. strace/ps will show the
process in FUTEX_WAIT status.

Thanks,
David.