官网地址：
https://github.com/dotnet/diagnostics/blob/master/documentation/dotnet-trace-instructions.md
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Viewing the trace captured from dotnet-trace
On Windows, .nettrace files can be viewed on PerfView (https://github.com/microsoft/perfview) for analysis, just like traces collected with ETW or LTTng. For traces collected on Linux, you can either move the trace to a Windows machine to be viewed on PerfView.
If you would rather view the trace on a Linux machine, you can do this by changing the output format of dotnet-trace to speedscope. You can change the output file format using the -f|--format option - -f speedscope will make dotnet-trace to produce a speedscope file. You can currently choose between nettrace (the default option) and speedscope. Speedscope files can be opened at https://www.speedscope.app.
Note: The .NET Core runtime generates traces in the nettrace format, and are converted to speedscope (if specified) after the trace is completed. Since some conversions may result in loss of data, the original nettrace file is preserved next to the converted file.
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