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A machine check exception (MCE) ... Example: CPU 0: Machine Check Exception: 0000000000000004 Bank 2: f200200000000863 Kernel panic: CPU context corrupt
In computing, Machine Check Architecture (MCA) is an Intel and AMD mechanism in which the CPU reports hardware errors to the operating system.. Intel's P6 and Pentium 4 family processors, AMD's K7 and K8 family processors, as well as the Itanium architecture implement a machine check architecture that provides a mechanism for detecting and reporting hardware (machine) errors, such as: system ...
For example, when a new CPU is ... Machine-check exception (MCE) Reliability, availability and serviceability (RAS) RAMS (reliability, availability, maintainability ...
Machine Check Exception: If set, enables machine check interrupts to occur. 7: PGE: Page Global Enabled: If set, address translations (PDE or PTE records) may be shared between address spaces. 8: PCE: Performance-Monitoring Counter enable: If set, RDPMC can be executed at any privilege level, else RDPMC can only be used in ring 0. 9: OSFXSR
For example, many Unix operating systems panic if the init process, ... Machine-check exception (MCE) Reliability, availability and serviceability (RAS) References
Processor exceptions generated by the CPU have fixed mapping to the first up to 32 interrupt vectors. [1] While 32 vectors (0x00-0x1f) are officially reserved (and many of them are used in newer processors), the original 8086 used only the first five (0-4) interrupt vectors and the IBM PC IDT layout did not respect the reserved range.
An exception handling mechanism allows the procedure to raise an exception [2] if this precondition is violated, [1] for example if the procedure has been called on an abnormal set of arguments. The exception handling mechanism then handles the exception. [3] The precondition, and the definition of exception, is subjective.
For this reason, it is normal practice to specify all of the mask bits, with the exception of machine-check mask bit, as 0 for the "first-level" interruption handlers. "Second-level" interruption handlers are generally designed for stacked interruptions (multiple occurrences of interruptions of the same interruption class).