您可以使用 rcutree.kthread_prio 内核启动参数来增加 RCU 的 kthreads 的调度优先级,这可以帮助避免这个问题。但是,请注意,这样做会增加系统的上下文切换率,从而降低性能。 一种周期性中断,其处理程序花费的时间比连续中断对之间的时间间隔长。这可以防止 RCU 的 kthreads 和 softirq 处理程序运行。请注意,某些高...
rcutree.kthread_prio= [KNL,BOOT] Set the SCHED_FIFO priority of the RCU per-CPU Set the SCHED_RR priority of the RCU per-CPU kthreads (rcuc/N). This value is also used for the priority of the RCU boost threads (rcub/N) and for the RCU grace-period kthreads (rcu_bh,4...
static void __invoke_rcu_cpu_kthread(void); static void invoke_rcu_core(void); static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp);#define RCU_KTHREAD_PRIO 1 /* RT priority for per-CPU kthreads. */@@ -1089,6 +1093,7 @@ static void __rcu_offline_cpu...
Name:Spawn the kthreads that handle RCU's grace periods. Proto:static int __init rcu_spawn_gp_kthread(void) Type:int Parameter:Nothing3316 kthread_prio_in = cuc/rcub kthread realtime priority 3322 If IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0...
gic_prio_irq_setup pmr=x20, tmp=x1 enable_da_f mov x0, sp bl enter_el1_irq_or_nmi irq_handler #ifdef CONFIG_PREEMPTION ldr x24, [tsk, #TSK_TI_PREEMPT] // get preempt count alternative_if ARM64_HAS_IRQ_PRIO_MASKING /*
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可以通过内核启动选项rcutree.kthread_prio提高rcu相关kthreads的调度优先级,可以避免以上问题的出现。但是,要注意这样做会提高系统的上下文切换,从而降低性能。 66 (10) A periodic interrupt whose handler takes longer than the time 67 interval between successive pairs of interrupts. This can 68 prevent RCU'...
rcu_torture_stall CPU-stall kthread. It waits as specified by stall_cpu_holdoff, then* induces a CPU stall for the time specified by stall_cpu. rcu_perf_read_lock Definitions for rcu perf testing. klp_shadow_get klp_shadow_get() - retrieve a shadow variable data pointer*@obj: pointer...
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You can use the rcutree.kthread_prio kernel boot parameter to increase the scheduling priority of RCU's kthreads, which can help avoid this problem. However, please note that doing this can increase your system's context-switch rate and thus degrade performance. o A periodic interrupt whose ...