On 2014-07-10 00:56, Michael Mattsson wrote:
> Hey,
> I've got 8 identical CentOS 6.5 clients that randomly keeps hanging
> fio when using --status-interval. I've tried fio 2.1.4 and fio 2.1.10
> they both behave the same. I've also tried piping the output to tee
> instead of redirecting to a file. I also tried --output and specified
> output file, still same problem. My fio command runs through its tests
> flawlessly without --status-interval and exits cleanly every time.
> There could be anywhere from 0 to 5 clients that gets affected.
> Running strace on the process that seem hung yields the following
> output:
>
> $ strace -p 31055
> Process 31055 attached - interrupt to quit
> futex(0x7f346ede802c, FUTEX_WAIT, 1, NULL

Strange, it must be stuck on the stat mutex, but I don't immediately see 
why that would happen. Does the attached patch make any difference for 
you, both in getting rid of the hang but still producing output at the 
desired intervals?

-- 
Jens Axboe