ERROR_MP_PROCESSOR_MISMATCH - 725 (0x2D5)

Technical Background

The error code MP_PROCESSOR_MISMATCH indicates that the CPUs in a multiprocessor system are not all of the same revision level. This condition can arise when different types or revisions of processors are installed within the same system. The operating system, to ensure stability and compatibility, restricts itself to the features supported by the least capable processor in the system.

Error Details

When this error occurs, it signifies that the system's ability to utilize all available processors is limited due to differences in their capabilities. This can lead to reduced performance or potential instability if operations require specific features not supported by the least capable processor.

Common Causes

• Installation of different types or revisions of processors within a single multiprocessor system.
• Incompatibility between the installed processors and the operating system's expectations for uniformity in hardware capabilities.

Real-World Context

This error can occur in various scenarios, such as upgrading a system with new processors that are not fully compatible with existing ones or when the system is initially configured with different processor types. The presence of this error does not necessarily indicate a critical failure but may require attention to ensure optimal system performance and stability.

Is This Error Critical?

The severity of this error varies depending on the specific usage context. In some cases, it might be acceptable if the system's overall functionality is not significantly impacted. However, in scenarios where high performance or specific processor features are required, this error could indicate a need for configuration changes.

How to Diagnose

1. Review Operation Context: Verify that all processors installed in the system are of the same type and revision level.
2. Validate Parameters: Ensure that any operations involving multiple processors are configured correctly and do not rely on features unsupported by the least capable processor.
3. Confirm Object Types: Check that the system is aware of the correct object types for each processor, as misidentification could lead to this error.

How to Resolve

1. Correct Parameter Usage: Ensure that all parameters used in operations are compatible with the capabilities of the least capable processor.
2. Adjust Operation Context: If possible, configure the system to use only processors of the same type and revision level.
3. Restore Data: In cases where data corruption or misconfiguration is suspected, restore from a known good backup if available.

Developer Notes

Developers should be aware that operations involving multiple processors may need to be adjusted to accommodate the limitations imposed by the least capable processor in the system. This can include adjusting performance expectations and ensuring that critical operations are not dependent on features unsupported by all processors.

Related Errors

• ERROR_PROCESSOR_MISMATCH
• ERROR_INVALID_PARAMETER

FAQ

Q: Can this error be ignored?

A: It depends on the specific usage context. If the system's performance and stability are not significantly impacted, it may be acceptable to ignore this error.

Q: How can I prevent this error from occurring?

A: Ensure that all processors installed in a multiprocessor system are of the same type and revision level before installation or configuration.

Summary

The MP_PROCESSOR_MISMATCH error (725, 0x2D5) indicates that different types or revisions of processors are present in a multiprocessor system. The operating system restricts itself to the features supported by the least capable processor to ensure stability and compatibility. This can impact performance but does not necessarily indicate a critical failure. Developers should be aware of this limitation when designing operations involving multiple processors.