SPDDump

Use SPDDump to inspect Sample Profile Database (SPD) files and object files that contain sample profile data for Sample Profile-Guided Optimization (SPGO). Use this tool to verify SPD contents, troubleshoot SPD/PDB compatibility problems, and view profile details such as functions, flow graphs, coverage, and dynamic instruction estimates. Run SPDDump from a Visual Studio Developer Command Prompt.

An SPD file contains processed profile data that the compiler uses to make optimization decisions during a build.

Syntax

SPDDump [options] spdfile

Parameters

options
Specify the following options for SPDDump:

• /all Output the entire SPD file. This option is the default.
• /header Output the SPD file header.
• /module Output the module header in the SPD file. Implies /header.
• /symbol Output the module symbol table. Implies /module.
• /func Output the function profile. Implies /module.
• /funcid:<fid> Output the function profile for the function with the given function ID.
• /cg Include callee information in function profile output. Implies /func.
• /fg Include the flow graph in function profile output. Implies /func.
• /data Output the data profile. Implies /module.
• /minidump Exclude sample correlation information such as RVA ranges from output.
• /coverage Output basic block coverage information.
• /dyninst[:<n>] Output a dynamic instruction estimate for the top 50 functions, or the top n functions if specified.
• /help Display help information.

spdfile
The path to the SPD file or object file to inspect.

Remarks

Note

Run this tool from a Visual Studio developer command prompt.

Use SPDDump to inspect the contents of a Sample Profile Database (SPD) file. SPDConvert produces SPD files. The build process that uses /SPGO embeds these files in PDB files.

To diagnose an "SPD version incompatible" error, use /header to examine the PDB GUID and age stored in the SPD file. Then, compare those values against the SPT file by using SPTDump /progid.

Example

This example outputs estimated basic block coverage information for an SPD file:

SPDDump /coverage filename.spd

This example outputs the SPD header to check the PDB GUID and age:

SPDDump /header filename.spd

This example outputs a dynamic instruction estimate for the top 10 functions:

SPDDump /dyninst:10 filename.spd

See also

Tutorial: Use Sample Profile-Guided Optimization (SPGO) to improve performance
SPDConvert
SPTDump
SPTAggregate