Intel IPP status 21 (ippStsCpuMismatch): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: IPP could not set the requested library path for the specified CPU target.

Could be also:
Constant	Type	OS
ERROR_NOT_READY	Win32 error	Windows
KERN_RIGHT_EXISTS	Kern return	Mac
EISDIR	errno	Any
LAST_CHANCE_CALLED_FROM_KMODE	BugCheck Code	Windows

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ippStsNonIntelCpu	ippStsNoIppFunctionFound

ippStsCpuMismatch

This status is tied to manual CPU-dispatch control. It indicates a mismatch between the requested processor-specific implementation and the CPU features available to the process.

It is different from an algorithm error: the primitive may be valid, but the application forced a dispatch layer that cannot run on the host.

Diagnostic focus

Check calls that override automatic dispatch or set CPU features manually.
Verify CPUID exposure inside containers and virtual machines.
Compare the requested feature mask with ippGetCpuFeatures and ippGetEnabledCpuFeatures output.

IPP CPU feature functions · Intel IPP CPU dispatching

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