Abstract: A method, apparatus, and computer instructions for processing trace data in a logical partitioned data processing system. A partition causing an exception is identified in response to detecting the exception. The partition is one within a set of partitions in the logical partitioned data processing system. The trace data for the identified partition is stored in an error log or other data structure for a machine check interrupt handler.

Abstract: A method, apparatus, and computer instructions in a logical partitioned data processing system for managing trace data. A call is received for the trace data from a calling partition within a plurality of partitions in the logical partitioned data processing system. The trace data in a buffer associated with the calling partition to form identified trace data is identified. Only the identified trace data for the calling partition is returned. The trace data for other partitions within the plurality of partitions is not returned to the calling partition.

Abstract: A method, apparatus, and computer instructions for preserving trace data in a logical partitioned data processing system. A call is received from a partition in a plurality of partitions to register a buffer in the partition for the trace data. The call includes a pointer to the buffer. The buffer is associated with a trace routine in platform firmware. The trace routine stores the trace data for calls made by the partition to the platform firmware in the buffer.