HRESULT 0x887A0021 (DXGI_ERROR_NONEXCLUSIVE): meaning and diagnosis

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DXGI_ERROR_NONEXCLUSIVE a global counter resource was in use, and the specified counter cannot be used by this Direct3D device at this time.

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DXGI_ERROR_DRIVER_INTERNAL_ERROR	DXGI_ERROR_NOT_CURRENTLY_AVAILABLE

DXGI_ERROR_NONEXCLUSIVE

DXGI_ERROR_NONEXCLUSIVE means that a global GPU counter resource is already in use and the current Direct3D device cannot use that counter at this time. The error is about exclusive access to a performance-counter resource, not about ordinary rendering or the availability of the display adapter.

Practical handling

Record the counter or profiling feature being requested and whether another profiler, overlay, or process may be active.
Release the counter when measurement ends and make acquisition failure nonfatal where metrics are optional.
Retry only after the previous owner can realistically have released the resource; an immediate busy loop adds no value.

Keep graphics and telemetry separate

An application should be able to render without an optional global counter. Treat unavailable profiling data as a measurable operational condition, not as a reason to corrupt or restart the graphics pipeline.

Microsoft: DXGI error codes

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