[Starpu-devel] Heft/dmda: locking in compute_all_performance_predictions.

[Cyril Roelandt <cyril.roelandt@inria.fr>]

Hey !

In heft, the following code is executed in 
compute_all_performance_predictions():

/* Sometimes workers didn't take the tasks as early as we expected */
_STARPU_PTHREAD_MUTEX_LOCK(&sched_mutex[worker]);
fifo->exp_start = STARPU_MAX(fifo->exp_start, starpu_timing_now());
exp_end[worker][nimpl] = fifo->exp_start + fifo->exp_len;
if (exp_end[worker][nimpl] > max_exp_end)
        max_exp_end = exp_end[worker][nimpl];
_STARPU_PTHREAD_MUTEX_UNLOCK(&sched_mutex[worker])


The exact same code can be found in 
compute_all_performance_predictions() in dmda, except that we do not 
lock the worker's mutex. Why is that ?