event的定义使用头文件trace_events.h中的宏,这里和tracepoint.h中的宏复用,分为多个stage进行结构体的定义,定义如下结构体: structtrace_event_raw_<call>;structtrace_event_data_offsets_<call>;enumprint_line_ttrace_raw_output_<call>(structtrace_iterator*iter,intflags);staticstructtrace_event_callevent...
其全名是Function trace,但是功能不只有函数跟踪,还包含了静态trace event、动态trace event、stack trace、latency tracer等功能,是一个完善的trace 框架。同时提供统计、过滤、触发等功能,方便trace log的捕获和分析。 Ftrace使用per-cpu的trace buffer,buffer内容为二进制格式,执行效率高。设置CONFIG_DYNAMIC_FTRACE后,...
function trace的最基本原理是利用编译器特性在非inline函数、无#define notrace __attribute__((__no_instrument_function__))属性的函数,在函数入口处添加了_mcount钩子,并且赋值lr(x30)寄存器到x0,这样就可以在_mcount钩子里增加维测函数。 具体做法: 在编译选项中增加-pg选项 * Gcc with -pg will put th...
5. Click on **Startup Event Trace Sessions **under Data Collector Sets.6. In the right pane of the Performance Monitor, locate the **ReadyBoot **entry and double-click on it.7. Navigate to the **Stop Condition **tab and replace whatever is in the **Maximum Size **field with 40....
# cat /sys/kernel/debug/tracing/trace_pipe & Following this, any enabled event will be traced into the console Event tracingmaynotwork with kernel versions < 4.9, due to a limitation in the event tracing mechanism. Functions with event tracing located too far way from the start of a module...
- I have Increased the maximum files size of the Startup Event Trace Sessions to 40 MB.(But ReadyBoot is disabled because i have a SSD) - Windows + HP updates are all done. But it doesn't help..Can someone help me?Thanks!! Tags: Microsoft Windows 10 (64-bit) Pavilion TP01-0200...
启动阶段使能event trace 同上,配置commandline: 代码语言:javascript 复制 trace_event=sched:*,timer:*,irq:*trace_buf_size=40M 有上面的实例可以知道,ftrace除了能够在运行阶段动态配置使能和关闭,也可以利用命令行来进行配置操作,这主要是针对boot阶段的trace操作。
Learn more about the Microsoft.Windows.EventTracing.TraceEvent.KernelTime in the Microsoft.Windows.EventTracing namespace.
sched:sched_kthread_work_queue_work[Tracepoint event] sched:sched_migrate_task[Tracepoint event] sched:sched_move_numa[Tracepoint event] sched:sched_pi_setprio[Tracepoint event] sched:sched_process_exec[Tracepoint event] sched:sched_process_exit[Tracepoint event] ...
(19) events/ - 包含所有trace event子系统的目录,其下的 enable 文件写入 0/1 以启用/禁用所有事件的跟踪。 (20) events/<system>/ - 包含 <system> 的所有跟踪事件的目录,其下的 enable 文件写入 0/1 以启用/禁用所有 <system> 的事件的跟踪;其下的 filter 文件如果设置,则仅跟踪通过过滤器的事件。