Re: sem_lock() vs qspinlocks

[Peter Zijlstra]

On Thu, May 19, 2016 at 10:39:26PM -0700, Davidlohr Bueso wrote:
> Specifically
> for the 'cascade_cond' and 'cascade_flock' programs, which exhibit hangs in libc's
> semop() blocked waiting for zero.

OK; so I've been running:

while :; do
  bin/cascade_cond -E -C 200 -L -S -W -T 200  -I 2000000 ;
  bin/cascade_flock -E -C 200 -L -S -W -P 200 -I 5000000 ;
done

for a few minutes now and its not stuck and my machine didn't splat.

Am I not doing it right?