rcuscale: Add concurrent expedited GP threads for callback scaling tests

Browse source

Add nexp and exp_interval parameters to rcuscale that spawn kthreads
running synchronize_rcu_expedited() in a loop. This generates concurrent
expedited GP load while the normal writers measure GP or callback
latency.

When combined with gp_async=1 (which uses call_rcu() for writers), this
tests how effectively callbacks benefit from expedited grace periods.
With RCU callback expedited GP tracking, the async callbacks should
complete faster because they piggyback on the expedited GPs rather than
waiting for normal GPs.

Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

...

This commit is contained in:

Puranjay Mohan 2026-06-24 06:23:53 -07:00 • committed by Paul E. McKenney

parent ec5ee5417b

commit 31b780b23f

1 changed files with 82 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

84

kernel/rcu/rcuscale.c

View file