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android - systrace: can't create …
https://stackoverflow.com/questions/46449567/systrace-cant-create-sys-kernel-debug-tracing-trace-marker-no-such-file-or-d
The problem is： IOError: Unable to get atrace data. Did you forget adb root? Try this cmd： python systrace.py -a com.example.myapp -b 16384 \ -o my_systrace_report.html sched freq idle am wm gfx view binder_driver hal \ dalvik camera input res
Linux tracing and debugging - OSADL
https://www.osadl.org/fileadmin/dam/presentations/HOT-04-2020/HOT-2020-04-Technical-Session-2a-Linux-kernel-debug-and-trace-interface.pdf
The virtual file system to access kernel tracing is the same as for all other debug subsystems of the kernel (usually automatically mounted): # mount -t debugfs nodev /sys/kernel/debug
Event Tracing — The Linux Kernel documentation
https://www.kernel.org/doc/html/latest/trace/events.html
1. Introduction¶. Tracepoints (see Using the Linux Kernel Tracepoints) can be used without creating custom kernel modules to register probe functions using the event tracing infrastructure.. Not all tracepoints can be traced using the event tracing system; the kernel developer must provide code snippets which define how the tracing information is saved into …
Tracing the Linux kernel with ftrace - #embeddedbits
https://embeddedbits.org/tracing-the-linux-kernel-with-ftrace/
First, we should enable ftrace in the Linux kernel ( CONFIG_FTRACE) and all tracers and options we plan to use. This is the menuconfig screen for kernel version 4.18 with most ftrace options enabled: With ftrace enabled, we can mount the tracefs virtual filesystem: # mount -t tracefs tracefs /sys/kernel/tracing.
Using the Linux Tracing Infrastructure
https://events.static.linuxfound.org/sites/events/files/slides/praesentation_0.pdf
record - record a trace into a trace.dat file start - start tracing without recording into a file extract - extract a trace from the kernel stop - stop the kernel from recording trace data reset - disable all kernel tracing / clear trace buffers report - read out the trace stored in a trace.dat file split - parse a trace.dat file into smaller ...
In-kernel memory-mapped I/O tracing — The Linux Kernel …
https://docs.kernel.org/trace/mmiotrace.html
Tracing is disabled by default, so it is safe to have this set to yes. SMP systems are supported, but tracing is unreliable and may miss events if more than one CPU is on-line, therefore mmiotrace takes all but one CPU off-line during run-time activation.
[Solus Linux] /sys/kernel/debug/tracing/events/syscalls No ... - GitHub
https://github.com/Sysinternals/ProcMon-for-Linux/issues/17
You can read more details on it here, but to turn it on, you should be able to run mount -t debugfs none /sys/kernel/debug to mount it. Try running again after that. Try running again after that. That being said, I think we should have a better failure path than simply throwing an exception from the fs iterator.
How do I get rid of /sys/kernel/debug/tracing? - Ask Ubuntu
https://askubuntu.com/questions/847962/how-do-i-get-rid-of-sys-kernel-debug-tracing
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Understanding SDT Markers and Debugging with Subtlety
https://www.opensourceforu.com/2015/03/understanding-sdt-markers-and-debugging-with-subtlety/
Debugging has become integral to a programmer s life. In C and C++, we normally debug using printf()s/ couts, gdb, valgrind, etc. SDT markers are very handy due to their simplicity yet great debugging capabilities.. What are SDT markers? The abbreviation stands for ’Systemtap Dtrace’ style markers.
ftrace - Function Tracer — The Linux Kernel documentation
https://www.kernel.org/doc/html/latest/trace/ftrace.html
The File System ¶. Ftrace uses the tracefs file system to hold the control files as well as the files to display output. When tracefs is configured into the kernel (which selecting any ftrace option will do) the directory /sys/kernel/tracing will be created. To mount this directory, you can add to your /etc/fstab file:
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