Visible to Intel only — GUID: mhs1685738061327
Ixiasoft
Visible to Intel only — GUID: mhs1685738061327
Ixiasoft
3.2.21. 2816904: PE might fail to detect multiple uncorrectable ECC errors in the L1 data cache tag RAM
Description
Under certain conditions, the Processing Element (PE) might fail to report multiple uncorrectable Error Correction Code (ECC) errors that occur in the L1 data cache tag RAM.
Conditions
- The PE detects and reports an uncorrectable ECC error in the L1 data cache tag RAM.
- The PE detects a second uncorrectable ECC error in the L1 data cache tag RAM and an uncorrectable ECC error in the L1 data cache data RAM.
Impact
If the previous conditions are met, then the PE might fail to report the second uncorrectable ECC error in the L1 data cache tag RAM and the address recorded in ERR0ADDR might have an incorrect value. The ECC error occurring in the L1 data cache data RAM is reported correctly.
Workaround
No workaround is necessary. This erratum represents a condition where multiple uncorrectable ECC errors occur in a short period of time. While the PE does not report the errors correctly, ECC still provides a valuable mechanism for error detection and correction.
Category
Category C