workqueue_congested — test whether a workqueue is congested
bool workqueue_congested ( | int cpu, |
struct workqueue_struct * wq); |
Test whether wq's cpu workqueue for cpu is congested. There is
no synchronization around this function and the test result is
unreliable and only useful as advisory hints or for debugging.
If cpu is WORK_CPU_UNBOUND, the test is performed on the local CPU.
Note that both per-cpu and unbound workqueues may be associated with
multiple pool_workqueues which have separate congested states. A
workqueue being congested on one CPU doesn't mean the workqueue is also
contested on other CPUs / NUMA nodes.