linux-6.12.1/kernel/Kconfig.preempt

1 # SPDX-License-Identifier: GPL-2.0-only
23 	  throughput. It will still provide good latencies most of the
29 	  raw processing power of the kernel, irrespective of scheduling
37 	  This option reduces the latency of the kernel by adding more
40 	  latency of rescheduling, providing faster application reactions,
41 	  at the cost of slightly lower throughput.
52 	bool "Preemptible Kernel (Low-Latency Desktop)"
56 	  This option reduces the latency of the kernel by making
63 	  system is under load, at the cost of slightly lower throughput
71 	bool "Fully Preemptible Kernel (Real-Time)"
75 	  This option turns the kernel into a real-time kernel by replacing
77 	  preemptible priority-inheritance aware variants, enforcing
79 	  non-preemptible sections. This makes the kernel, except for very
85 	  require real-time guarantees.
108 	  provide a pre-built kernel binary to reduce the number of kernel
115 	  Interesting if you want the same pre-built kernel should be used for
122 	  This option permits Core Scheduling, a means of coordinated task
123 	  selection across SMT siblings. When enabled -- see
124 	  prctl(PR_SCHED_CORE) -- task selection ensures that all SMT siblings
128 	  Use of this feature includes:
129 	   - mitigation of some (not all) SMT side channels;
130 	   - limiting SMT interference to improve determinism and/or performance.
145 	  - Ease of experimentation and exploration: Enabling rapid
146 	    iteration of new scheduling policies.
147 	  - Customization: Building application-specific schedulers which
148 	    implement policies that are not applicable to general-purpose
150 	  - Rapid scheduler deployments: Non-disruptive swap outs of
160 	    Documentation/scheduler/sched-ext.rst
161 	    https://github.com/sched-ext/scx