Method and apparatus to trace and correlate data trace and instruction trace for out-of-order processors
US8122437B2 · kind B2 · utility
3Cited by
4References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Dec 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3636
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a data processing system, a marked bit is used to identify a data access instruction throughout the pipeline to indicate that the instruction meets user-specified criteria (e.g., a meets a data address range of interest). Based on the marked bit, an in-order program correlation message is generated which indicates when the data access instruction occurs relative to the instruction stream. The marked bit is also used to generate an in-order data trace message. As a result, the trace streams including only data access instructions meeting user-specified criteria may be post-processed and correlated precisely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.