thank you for your answer. As you see in my examples, the load is not huge caused by the problem but the kworker processes takes a few percent of the CPU and the load is not going to zero (the kworker processes continuously consumes more than 1,5% CPU (on Raspberry 3b) and more tha...
[kworker/0:1H:15345] https://blog.csdn.net/jiangganwu/article/details/89711354 内核软死锁(soft lockup)bug原因分析 Soft lockup名称解释:所谓,soft lockup就是说,这个bug没有让系统彻底死机,但是若干个进程(或者kernel thread)被锁死在了某个状态(一般在内核区域),很多情况下这个是由于内核锁的使用的问题。
PID: 278 COMMAND: "kworker/2:1H" TASK: ffff917c6d3b3f40 [THREAD_INFO: ffff917c64798000] CPU: 2 STATE: TASK_RUNNING (PANIC) 通过crash 载入 corefile 的时候,crash 会自动输出一段信息,这段信息包含了系统的一些基本信息,如 CPU、内存、架构等。如果后面分析的时候还想看这部分信息,可以通过 sys ...
PART ONE--Crypto Subsystem of Linux Kernel 介绍由应用层所发出的crypto(cryptography)request,透过system call将request传送到Linux kernel端,并经由crypto subsystem将request转发给硬件算法引擎(hardware crypto engine)的流程。 概览 Crypto subsystem是Linux系统中负责处理crypto request的子系统,除了包含流程控制机制之外...
16355 root 20 0 0 0 0 S 0.3 0.0 0:00.39 kworker/0:1 16358 root 20 0 161996 2224 1564 R 0.3 0.0 0:00.09 top 1 root 20 0 43640 4024 2552 S 0.0 0.0 0:03.60 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.04 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:03.80 ksoftirqd/0 ...
同样是一个内核选项,用于输出每个进程的栈使用情况。它的原理是在内核栈创建时使用’0’初始化,再通过计算thread_info结构到第一个非0位置的大小,获取栈使用情况。 可以通过 dmesg 查看栈使用情况: # dmesg | grep greatest kworker/u:0 used greatest stack depth: 10564 bytes left ...
{ 3 int ret; 4 struct cherie_crypto_engine *engine = get_engine(); 5 struct cherie_request_state *state = ahash_request_ctx(req); 6 7 state->algo_op = ALGO_UPDATE; 8 ret = cherie_crypto_request_enqueue(req); 9 kthread_queue_work(ctx->kworker, &ctx->do_requests); 10 return ...
[20512.223230] -(3)[30488:kworker/u8:2]Kernel Offset: disabled [20513.223253] -(3)[30488:kworker/u8:2]PC is at set_task_cpu+0xd8/0x23c [20513.223262] -(3)[30488:kworker/u8:2]LR is at walt_fixup_busy_time+0x1f0/0x4ac [20513.223268] -(3)[30488:kworker/u8:2]pc : [<c02596f0...
如果某个kworker疯了,占用CPU非常高,可能有如下两种原因: 大量的work正在正在提交调度; 某个work占用过多CPU; 第1种原因可以通过tracing机制来跟踪: echoworkqueue:workqueuequeuework>/sys/kernel/debug/tracing/seteventechoworkqueue:workqueuequeuework>/sys/kernel/debug/tracing/seteventcat /sys/kernel/debug/tracin...
[ 802.714213] CPU: 2 PID: 29293 Comm: kworker/2:1H Tainted: G O L 5.4.113-1.el7.elrepo.x86_64 #1[ 802.714215] Hardware name: Silicom 90500-0151-G01/90500-0151-G01, BIOS MADRID-01.00.18.06 06/01/2020[ 802.714235] Workqueue: adf_pf_resp_wq_0 adf_response_handler_...