How do I run a DTrace script?

You can run the script by entering the filename at the command line by following two steps. First, verify that the first line of the file invokes the interpreter. The interpreter invocation line is #!/usr/sbin/dtrace -s. Then set the execute permission for the file.

What is DTrace in Solaris?

DTrace, or Dynamic Tracing, is a powerful diagnostic tool introduced in the Solaris 10 OS. Since its introduction, it has been implemented in other operating systems, the most noteworthy being FreeBSD and Mac OS X. This tutorial uses DTrace to analyze several applications.

Which features are included in the DTrace tool?

Language and application providers. With a supported language provider, DTrace can retrieve context of the code, including function, source file, and line number location. Further, dynamic memory allocation and garbage collection can be made available if supported by the language.

What is DTrace in MySQL?

The DTrace probes in the MySQL server are designed to provide information about the execution of queries within MySQL and the different areas of the system being utilized during that process.

How do I use DTrace Enterprise Vault?

Command Line

  1. Log onto the EV Server as the Vault Service Account.
  2. Open a Command Prompt window.
  3. Navigate to the EV program folder (typically C:\Program Files (x86)\Enterprise Vault)
  4. Type dtrace and press Enter.
  5. At the Dtrace prompt (DT>) type View and press Enter.

How do you analyze ftrace?

The general steps:

  1. Write to some specific files to enable/disable tracing.
  2. Write to some specific files to set/unset filters to fine-tune tracing.
  3. Read generated trace output from files based on 1 and 2.
  4. Clear earlier output or buffer from files.

How do I extract a trace buffer file?

The trace-cmd(1) extract is usually used after trace-cmd-start(1) and trace-cmd-stop(1). It can be used after the Ftrace tracer has been started manually through the Ftrace pseudo file system. The extract command creates a trace. dat file that can be used by trace-cmd-report(1) to read from.

How do I collect ftrace?

To find a given ftrace event from a Catapult event:

  1. Open the raw ftrace log. Traces in recent versions of systrace are compressed by default:
  2. Find the relative timestamp in the Catapult visualization.
  3. Find a line at the beginning of the trace containing tracing_mark_sync . It should look something like this:

How do you use ATrace?

System tracing (ATrace) your Android apps for better performance

  1. identify a scenario to trace (e.g., app startup, or performing a time-sensitive scenario for the app)
  2. add any trace calls if the scenario is not well traced.
  3. reset the device to the “before-the-scenario” state (e.g., for startup, the process is killed)