`dmtracedump` is a tool that generates
graphical call-stack diagrams from trace log files. The tool uses the Graphviz
Dot utility to create the graphical output, so you need to install Graphviz
before running `dmtracedump`. If you haven't yet generated trace logs and
saved them from your connected device to your local machine, go to
[Generate trace logs by instrumenting your app](https://developer.android.com/studio/profile/generate-trace-logs).

The `dmtracedump` tool generates the call stack data as a tree diagram, where each
node represents a method call. It shows call flow (from parent node to child nodes)
using arrows. The diagram below shows a sample output of `dmtracedump`.

The `dmtracedump` tool is provided in the Android SDK Tools package and is
located in <var translate="no">android-sdk</var>`/platform-tools/`.

## Syntax

The usage for dmtracedump is:  

```
dmtracedump [-ho] [-s sortable] [-d trace-base-name] [-g outfile] trace-base-name
```

The tool then loads trace log data from <var translate="no">trace-base-name</var>`.data` and
<var translate="no">trace-base-name</var>`.key`.

### Global options

| Global options | Description |
|---|---|
| `-h` | Turn on HTML output |
| `-o` | Dump the trace file instead of profiling |

### Commands and command options

| Commands and options | Description |
|---|---|
| `-d `<var translate="no">trace-base-name</var> | Diff with this trace name |
| `-g `<var translate="no">outfile</var> | Generate output to <var translate="no">outfile</var> |
| `-s `<var translate="no">sortable</var> | URL base to the location of the sortable javascript file |
| `-t `<var translate="no">percent</var> | Minimum threshold for including child nodes in the graph (child's inclusive time as a percentage of parent inclusive time). If this option is not used, the default threshold is 20%. |

## Output

![](https://developer.android.com/static/images/tracedump.png)

**Figure 1.** Screenshot of dmtracedump

<br />

For each node in the graph, `dmtracedump` shows the following
information:  

```
ref callname (inc-ms, exc-ms,numcalls)
```

- <var translate="no">ref</var> --- Call reference number, as used in trace logs
- <var translate="no">inc-ms</var> --- Inclusive elapsed time (milliseconds spent in method, including all child methods)
- <var translate="no">exc-ms</var> --- Exclusive elapsed time (milliseconds spent in method, not including any child methods)
- <var translate="no">numcalls</var> --- Number of calls