[lttng-dev] Userspace RCU: workqueue with batching, cheap wakeup, and work stealing

Mathieu Desnoyers mathieu.desnoyers at efficios.com
Thu Oct 23 17:57:08 EDT 2014

The next thing I'm wondering now: should we include an
optional bound to the global workqueue size in the API ?

I've just had cases here where I stress test the queue
with very frequent dispatch, and it can fill up memory
relatively quickly if the workers have a large amount of
work to do per work-item.

I think the usual way to do this would be to make the
behavior nonblocking when the queue is full, so the
dispatcher can take action and move the work away to
another machine, or report congestion.

Thoughts ?



Mathieu Desnoyers
EfficiOS Inc.

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