# 英伟达团队您好，请教个问题，使用rt内核情况下，以下这个内核参数配置，如果高负载情况下，会很容易引起rcu吗？ **URL:** \ **Category:** Jetson Thor\ **Tags:** preempt\_rt, chinese, kernel\ **Created:** [May 17, 2026, 2:35am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389 "2026-05-17T02:35:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![1516775545](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1516775545](https://forums.developer.nvidia.com/u/1516775545)\ **Post date:** [May 17, 2026, 2:35am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389/1 "2026-05-17T02:35:05Z")
1. 内核启动参数配置：rcu\_nocb\_poll isolcpus=3,8 nohz=on rcu\_nocbs=1,2,3,4,5,6,7,8,9,10,11 nohz\_full=1,2,3,4,5,6,7,8,9,10,11 2. rcu的日志：[29.665309] debugfs: Directory ‘null’ with parent ‘/’ alrea! [29.665457] cnss: Failed to get cooling device node [29.688436] [Networ][0x1c4fa11][07:33:54.133637] wlan: [1727:E:MLO\_MGR] mlo\_d [29.688522] [Networ][0x1c4fa68][07:33:54.133724] wlan: [1727:E:PMO] pmo\_regi0 [29.691163] [Networ][0x1c504b8][07:33:54.136364] wlan: [1727:E:PMO] pmo\_regi1 [29.694199] WARNING: CPU: 11 PID: 1727 at kernel/softirq.c:210 \_\_local\_bh\_enc [29.694404] —[end trace 0000000000000000]— [29.694409] WARNING: CPU: 11 PID: 1727 at kernel/irq/irqdesc.c:673 handle\_ir8 [29.694568] WARNING: CPU: 11 PID: 1727 at drivers/irqchip/irq-gic-v3.c:790 gc [29.694715] —[end trace 0000000000000000]— [29.694724] WARNING: CPU: 11 PID: 1727 at kernel/softirq.c:148 \_\_local\_bh\_di0 [29.694850] —[end trace 0000000000000000]— [29.777508] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.777863] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.785790] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.790066] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.790088] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.790097] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.790105] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.791114] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.791240] NOHZ tick-stop error: local softirq work is pending, handler #80! [29.791535] NOHZ tick-stop error: local softirq work is pending, handler #80! [50.702151] rcu: INFO: rcu\_preempt detected stalls on CPUs/tasks: [50.702154] rcu: Tasks blocked on level-0 rcu\_node (CPUs 0-13): P1727/2:l [50.702160] rcu: (detected by 12, t=5252 jiffies, g=2989, q=7793 ncpus=1) [50.702840] rcu: rcu\_preempt kthread timer wakeup didn’t happen for 2764 jif2 [50.702842] rcu: Possible timer handling issue on cpu=0 timer-softirq=529 [50.702843] rcu: rcu\_preempt kthread starved for 2765 jiffies! g2989 f0x0 RC0 [50.702844] rcu: Unless rcu\_preempt kthread gets sufficient CPU time, OO. [50.702844] rcu: RCU grace-period kthread stack dump: [50.702869] NMI backtrace for cpu 0CU GP kthread last ran: [113.722150] rcu: INFO: rcu\_preempt detected stalls on CPUs/tasks: [113.722153] rcu: Tasks blocked on level-0 rcu\_node (CPUs 0-13): P1727/2:l [113.722157] rcu: (detected by 13, t=21007 jiffies, g=2989, q=8117 ncpus=) [176.742154] rcu: INFOTasks blocked on level-0 rcu\_node (CPUs 0-13): P1727/2:l [176.742158] rcu: (detected by 11, t=36762 jiffies, g=2989, q=8197 ncpus=) [239.762150] rcu: INFO: rcu\_preempt detected stalls on CPUs/tasks: [239.762153] rcu: Tasks blocked on level-0 rcu\_node (CPUs 0-13): P1727/2:l [242.654158] INFO: task rcub/0:21 blocked for more than 120 seconds.64 ncpus=) [242.654161] Tainted: G W O 6.8.12-rt-tegra #1 [242.654162] “echo 0 \> /proc/sys/kernel/hung\_task\_timeout\_secs” disables this. [242.654225] INFO: task kworker/u30:3:629 blocked for more than 120 seconds. [242.654227] Tainted: G W O 6.8.12-rt-tegra #1 [242.654228] “echo 0 \> /proc/sys/kernel/hung\_task\_timeout\_secs” disables this. [242.654273] INFO: task systemd-network:983 blocked for more than 120 seconds. [242.654274] Tainted: G W O 6.8.12-rt-tegra #1 [242.654275] “echo 0 \> /proc/sys/kernel/hung\_task\_timeout\_secs” disables this. [242.654326] INFO: task cups-browsed:2661 blocked for more than 120 seconds. [242.654326] Tainted: G W O 6.8.12-rt-tegra #1 [242.654327] “echo 0 \> /proc/sys/kernel/hung\_task\_timeout\_secs” disables this. ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [May 18, 2026, 2:33am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389/4 "2026-05-18T02:33:40Z")
Hi, Do you use Jetpack 7.1 r38.4? Would like to make sure you use latest release for Jetson Thor. ---
**Author:** ![1516775545](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1516775545](https://forums.developer.nvidia.com/u/1516775545)\ **Post date:** [May 18, 2026, 9:40am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389/5 "2026-05-18T09:40:31Z")
yes, jetpack 7.1 r38.4 agi@localhost:~$ cat /etc/nv\_tegra\_release # R38 (release), REVISION: 4.0, GCID: 43443517, BOARD: generic, EABI: aarch64, DATE: Wed Dec 31 00:15:19 UTC 2025 # KERNEL\_VARIANT: oot TARGET\_USERSPACE\_LIB\_DIR=nvidia TARGET\_USERSPACE\_LIB\_DIR\_PATH=usr/lib/aarch64-linux-gnu/nvidia INSTALL\_TYPE=openrm ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [May 19, 2026, 5:44am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389/6 "2026-05-19T05:44:46Z")
Hi, Please ensure you applied this to rebuild RT kernel: [Jetson AGX Thor FAQ](https://forums.developer.nvidia.com/t/jetson-agx-thor-faq/346561#p-1689596-q-i-cannot-successfully-enable-rt-kernel-on-jetpack-71ga-7) If the issue persists, please share the steps to replicate it on AGX Thor developer kit. So that we can set up and check. ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [June 17, 2026, 3:04am UTC](https://forums.developer.nvidia.com/t/rt-rcu/370389/8 "2026-06-17T03:04:36Z")
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.