主要用来梳理内核模块的逻辑 二 使用 （1）function 使用 /sys/kernel/debug/tracing # echo nop > c...
linux 错误挂载“/sys/kernel/debug/tracing”到rootfs您的容器位于自己的独立文件系统中，当它试图访问/...
1. events 的 trigger 文件 /sys/kernel/tracing/events/sched/sched_blocked_reason # cat trigger # Available triggers: # traceon traceoff stacktrace enable_event disable_event enable_hist disable_hist hist/sys/kernel/tracing/events/sched/sched_blocked_reason # echo stacktrace > trigger//设置trigger...
Tracepoint Event是内核中静态tracepoint所触发的事件,这些tracepoint用来判断程序运行期间内核的行为细节,比如slab分配器的分配次数等。 基于ftrace框架实现,内核中的所有tracepoint都可以作为perf都性能事件cat /sys/kernel/debug/tracing/available_events,可查看当前系统的所有tracepoint分成了几大类: ext4 文件系统的trac...
terminate called after throwing an instance of 'std::experimental::filesystem::v1::__cxx11::filesystem_error' what(): filesystem error: directory iterator cannot open directory: No such file or directory [/sys/kernel/debug/tracing/events/syscalls] Activity Sign up for free to join this co...
Raw lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing Output information may be incomplete. Environment Red Hat Enterprise Linux 8. Red Hat Enterprise Linux 9. Subscriber exclusive content A Red Hat subscription provides unlimited access to our knowledgebase, tools, and ...
Our monitoring detected something weird about /sys/kernel/debug/tracing/, saying that it's not accessible by the monitoring user (nrpe)? Why the permission of directory /sys/kernel/debug/tracing is 700 in RHEL8/9 while it was 755 in RHEL7?
No such file or directory: /sys/kernel/debug/tracing/available_filter_functions It turned out that debugfs had come unmounted for some reason. But I went down a rabbit hole because I found this documentation saying that tracing lives at /sys/kernel/tracing not /sys/kernel/debug/tracing in ...
❏ A new timer module is provided that enables applications to configure and use timers directly rather than have time-driven events limited to using the system tick. ❏ All kernel objects may be created statically or dynamically. ❏ An additional heap manager, called...
• ip.symbol shows symbol for instruction pointer (the code that generated the fault); if no debug symbols available, perf trace will print raw IP; • addr.dso shows DSO for the faulted address; • map type is either d for non-executable maps or x for executable maps; ...