如果expedited的宽限期检测到停顿,它将在dmesg中放置如下消息: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 7-... } 21119 jiffies s: 73 root: 0x2/. 这表明CPU 7无法响应重新调度IPI。CPU编号后面的三个句点("...")表示CPU处于在线状态(否则,第一个周期为"O"),CPU在加宽宽限期开始...
解释RCU’s CPU Stall-Detector“Splats” 对于RCU 的非 RCU 任务风格,当一个 CPU 检测到某个其他 CPU 正在停止时,它将打印类似于以下内容的消息: INFO:rcu_scheddetected stalls on CPUs/tasks: 2-...: (3 GPs behind) idle=06c/0/0 softirq=1453/1455 fqs=0 16-...: (0 ticks this GP) idle=...
294 If an expedited grace period detects a stall, it will place a message 295 like the following in dmesg: 296 297 INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 7-... } 21119 jiffies s: 73 root:0x2/. 298 299 This indicates that CPU 7 has failed to respond to a res...
root@OpenWrt:/# [ 184.045603] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 184.051575] rcu: 3-...0: (1 ticks this GP) idle=572/1/0x4000000000000000 softirq=5076/5076 fqs=935 [ 184.060757] (detected by 0, t=2102 jiffies, g=7101, q=25) [ 184.066272] Task dump for CPU...
[RCUstall]RCUstall分析，RCUstall内核文档翻译 [RCUstall]RCUstall分析，RCUstall内核⽂档翻译 使⽤RCU的CPU失速检测器 本⽂档⾸先讨论RCU的CPU停顿检测器可以定位哪些问题，然后讨论可⽤于微调检测器操作的内核参数和Kconfig选项。最后，本⽂解释了失速检测器的“splat”格式。是什么导致RCU CPU停顿警告？是...
INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P0 } 67953 jiffies s: 1039 root: 0x0/T blocking rcu_node structures: systemd-hostnamed.service: Processes still around after final SIGKILL. Entering failed mode. systemd-hostnamed.service: Unit entered failed state. ...
pr_err("INFO: %s detected expedited stalls on CPUs/tasks: {", rcu_state.name); Expand All @@ -647,7 +651,7 @@ static void synchronize_rcu_expedited_wait(void) } } pr_cont(" } %lu jiffies s: %lu root: %#lx/%c\n", jiffies - jiffies_start, rcu_state.expedited_sequence, j ...
return rcu_seq_done(&rcu_state.expedited_sequence, s); } /* * Reset the ->expmaskinit values in the rcu_node tree to reflect any * recent CPU-online activity. Note that these masks are not cleared * when CPUs go offline, so they reflect the union of all CPUs that ha...
< 请根据issue的类型在标题右侧下拉框中选择对应的选项(需求、缺陷或CVE等)< 请根据issue相关的版本在里程碑中选择对应的节点,若是与版本无关,请选择“不关联里程碑”【标题描述】能够简...
* See Documentation/RCU/stallwarn.txt for info on how to debug * RCU CPU stall warnings. */ pr_err("INFO: %s detected stalls on CPUs/tasks:", rsp->name); print_cpu_stall_info_begin(); rcu_for_each_leaf_node(rsp, rnp) { raw_spin_lock_irqsave_rcu_node(rnp, flags); ndetec...