Accounting method and logic for determining per-thread processor resource utilization in a simultaneous multi-threaded (SMT) processor
US7657893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2003 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Sep 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/885
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An accounting method and multi-threaded processor include a mechanism for accounting for processor resource usage by threads within programs. Relative resource use is determined by detecting a particular cycle state of threads active within the processor. If instructions are dispatched for all threads or no threads, the processor cycle is accounted equally to all threads. Alternatively if no threads are in the particular cycle state, the accounting may be made using a prior state, or in conformity with ratios of the threads' priority levels. If only one thread is in the particular cycle state, that thread is accounted the entire processor cycle. If multiple threads are dispatching, but less than all threads are dispatching, the processor cycle is billed evenly across the dispatching threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.