当你在Linux系统中看到类似于”rcu_sched detected stalls on CPUs/tasks”的错误消息时,这表示系统检测到了针对RCU(Read-Copy-Update)机制的延迟。RCU是一种用于实现读写并发性的技术,在内核中广泛使用。 这个错误通常意味着在进行RCU更新时,某些CPU或任务被阻塞了较长时间,导致系统性能下降或出现其他问题。可能会...
最近换平台,CPU使用了PowerPC的P1020,双核。 linux版本也升级到了3.0.48版本。升级之后出现了一个问题:SDK里面的程序跑一段时间之后会报告: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 1} (detected by 0, t=15002 jiffies)。意思是CORE0检测到CORE1挂了。 SDK里面使用了lock_kernel和unlock_...
NFO: rcu_sched_state detected stalls on CPUs/tasks: {15 } (detected by 4, 6002 jiffies,其余信息省略) 该环境没有开启rcu的callback线程,也就是rcu是在软中断中处理。 获取信息发现,有一个核的rcu的qlen已经达到了几百万,而且维持不变,也就是,既没有新的rcu挂在这个核,也没见这个核处理rcu。 查看...
<3>[20866.897017] INFO: rcu_sched detected stalls on CPUs/tasks:<3>[20866.897049] 1: (1 GPs behind) idle=369/140000000000000/0 softirq=593036/593037 fqs=221951 <3>[20866.897057] (detected by 3, t=247997 jiffies, g=450146, c=450145, q=48413)<6>[20866.897072] Task dump for CPU 1:<...
INFO: rcu_sched_state detected stalls on CPUs/tasks: { 15} (detected by 17, t=15002 jiffies) 或 INFO: rcu_bh_state detected stalls on CPUs/tasks: { 3 5 } (detected by 2, 2502 jiffies) 等等。 在上述告警信息之后通常还会看到相关CPU的stack dump,检查stack trace有助于了解当时运行的代码和...
[ 59.881517] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 59.888999] rcu: 1-...0: (1 ticks this GP) idle=f4e/1/0x4000000000000000 softirq=2189/2189 fqs=2625 [ 59.900852] (detected by 5, t=5252 jiffies, g=1753, q=152) ...
并继续为每个暂停当前 RCU 任务宽限期的任务输出 sched_show_task()。 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: ...
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) ...
NFO: rcu_sched_state detected stalls on CPUs/tasks: {15 } (detected by 4, 6002 jiffies,其余信息省略)该环境没有开启rcu的callback线程,也就是rcu是在软中断中处理。获取信息发现,有⼀个核的rcu的qlen已经达到了⼏百万,⽽且维持不变,也就是,既没有新的rcu挂在这个核,也没见这个核处理rcu。
Same issue on proxmox :( Originally posted by @polter05 in #1705 (comment) Home Assistant OS 9.5 Note: This is an issue which tracks CPU stalls on Proxmox. It is similar to #1705 which tracks such issues on VirtualBox, but likely a diffe...