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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-973PROCR (RISC Processor Circuit Pack TN798)
3
Processor Cache Audit (#896)
This nondestructive audit checks the state of the Cache Parity bit maintained by
the RISC CPU. If this bit is set, there may be problems with either the CPU, the
Instruction, or Data Cache. An indication of bad cache parity won’t itself mean
that the system won’t operate, but minor to severe performance degradation may
be present. For example, a single bad bit in either cache could cause this bit to
be set. If the faulty word is seldom accessed, the impact will be small. If the bit is
accessed frequently, there could be serious problems with much, or all, of the
cache (stuck data bit) with the only direct indication again being the cache parity
error or cache test error.
Processor Write Buffer Test (#900)
This test is a nondestructive test. This test verifies that the Write Buffer operates
properly on the Processor circuit pack. Failure of this test is serious. The
Processor circuit pack must be replaced as soon as possible.
Table 3-427. Test #896 Processor Cache Audit
Error
Code
Te st
Result Description/ Recommendation
100 ABORT The test did not complete within the allowable time period.
1. Retry the command.
2500 ABORT Internal system error
1. Retry the command.
FAIL The Cache Parity Error bit is set, there may be problems with either the
CPU or the Instruction or Data Cache.
1. Retry the command.
2. If the test continues to fail, run test processor a|b long.
3. If the Processor Cache test (#895) or the Processor Cache Audit
(#896) fails, replace the Processor circuit pack.
PASS The Processor has not detected any parity errors in the Instruction and
Data Caches since the last time this audit was run.
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