Lines Matching +full:loop +full:- +full:powered

1 # SPDX-License-Identifier: GPL-2.0-only
3 # RCU-related configuration options
11 	# Dynticks-idle tracking
26 	  thousands of CPUs, but for which real-time response
37 	  designed for UP systems from which real-time response
42 	bool "Make expert-level adjustments to RCU configuration"
46 	  expert-level adjustments to RCU configuration.  By default,
47 	  no such adjustments can be made, which has the often-beneficial
48 	  side-effect of preventing "make oldconfig" from asking you all
52 	  Say Y if you need to make expert-level adjustments to RCU.
60 	  permits arbitrary sleeping or blocking within RCU read-side critical
67 	  This option selects the single-CPU non-preemptible version of SRCU.
73 	  This option selects the full-fledged version of SRCU.
80 	  task-based RCU implementations.  Not for manual selection.
88 	  This option force-enables a task-based RCU implementation
90 	  idle, and user-mode execution as quiescent states.  Not for
104 	  This option force-enables a task-based RCU implementation
106 	  user-mode execution as quiescent states.  It forces IPIs and
121 	  This option enables a task-based RCU implementation that uses
122 	  explicit rcu_read_lock_trace() read-side markers, and allows
123 	  these readers to appear in the idle loop as well as on the
145 	int "Tree-based hierarchical RCU fanout value"
157 	  systems, but if you are stress-testing the RCU implementation
158 	  itself, small RCU_FANOUT values allow you to test large-system
165 	int "Tree-based hierarchical RCU leaf-level fanout value"
173 	  This option controls the leaf-level fanout of hierarchical
176 	  scheduling-clock interrupts for energy-efficiency reasons will
177 	  want the default because the smaller leaf-level fanout keeps
181 	  number of cache misses incurred during RCU's grace-period
182 	  initialization.  These systems tend to run CPU-bound, and thus
185 	  leaf-level fanouts work well.  That said, setting leaf-level
187 	  lock contention on the leaf-level rcu_node structures unless
209 	  Say Y here if you are working with real-time apps or heavy loads
213 	int "Milliseconds to delay boosting after RCU grace-period start"
219 	  a given grace period before priority-boosting preempted RCU
226 	bool "Perform RCU expedited work in a real-time kthread"
240 	bool "Offload RCU callback processing from boot-selected CPUs"
246 	  real-time workloads.	It can also be used to offload RCU
247 	  callback invocation to energy-efficient CPUs in battery-powered
250 	  workloads will incur significant increases in context-switch
257 	  the "x" is "p" for RCU-preempt (PREEMPTION kernels) and "s" for
258 	  RCU-sched (!PREEMPTION kernels).  Nothing prevents this kthread
281 	bool "Offload RCU callback from real-time kthread"
290 	  it is your responsibility to ensure that latency-sensitive
307 	  real-time installations and for battery-powered devices,
311 	  Say N here if you hate read-side memory barriers.