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...
据我所知这是一个CPU问题。我总是在虚拟机上分配 6 个 CPU(我有 Ryzen 5 3600)和 2 或 4Go RAM(我的主机上有 16Go)。从dmesg:[ 61.290365] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 61.290391] rcu: 4-...!: (16 GPs behind) idle=4...
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_...
RK3588 NVR版本SDK编译的kernel出现rcu: INFO: rcu_sched detected stalls on CPUs/tasks问题。使用百度...
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 ...
linux查看内核调度,一个小实验看清Linux内核调度机制https://blog.csdn.net/weixin_33277215/article/details/116631744 linux内核死锁调试https://blog.csdn.net/u010481276/article/details/78967143 NMI backtrace for cpu 0 when run oslathttps://bugzilla.redhat.com/show_bug.cgi?id=1837816...
<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:<...
I'm getting "rcu_sched self-detected stall on CPU" errors in every VM at startup, and then if the VM's are under a heavy load, the proxmox host machine will also lockup and begin saying the same message. I'm not sure even how to figure out my root cause. Numerous google have ...
[ 1140.024617] Task dump for CPU 0:[ 1140.027840] swapper/0 R running task 0 0 0 0x00000022[ 1140.034894] Call trace:[ 1140.037340] [<ffff0000080853ac>] __switch_to+0x94/0xd8[ 1147.864375] INFO: rcu_sched detected stalls on CPUs/tasks:[ 1147.869882] 0-...: (1...
通过cpu热插拔解决rcustall的问题 在linux 3.10环境⼀次故障处理中，发现有类似如下打印：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...