On Thu, 25 Jun 2020 15:34:03 +1000 Nicholas Piggin <[email protected]> wrote:
> Batch these up so we disable all the per-cpu buffers first, then > synchronize_rcu() once, then reset each of the buffers. This brings > the time down to about 0.5s. After applying this patch, running tools/testing/selftests/ftracetest went from 5 minutes and 35 seconds to 5 minutes 5 seconds to complete on my 4 core (8 with hyperthreading) machine! That's almost a 10% drop! Thanks, I'm definitely applying this for the next merge window. -- Steve
