International business machines corporation (20240104021). PROCESSOR CROSS-CORE CACHE LINE CONTENTION MANAGEMENT simplified abstract

PROCESSOR CROSS-CORE CACHE LINE CONTENTION MANAGEMENT

Organization Name

international business machines corporation

Inventor(s)

Michael Joseph Cadigan, Jr. of Poughkeepsie NY (US)

Gregory William Alexander of Pflugerville TX (US)

Deanna Postles Dunn Berger of Hyde Park NY (US)

Timothy Bronson of Round Rock TX (US)

Chung-Lung K. Shum of Wappingers Falls NY (US)

Aaron Tsai of Hyde Park NY (US)

PROCESSOR CROSS-CORE CACHE LINE CONTENTION MANAGEMENT - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240104021 titled 'PROCESSOR CROSS-CORE CACHE LINE CONTENTION MANAGEMENT

Simplified Explanation

The patent application describes a method for managing cache line contention in a multiprocessing system by sending cross-invalidate commands to caches based on cache state change requests.

• The method involves sending a cross-invalidate command to caches when a cache state change request is received.
• If a cross-invalidate reject response is received, a retry delay is determined.
• The method waits for the retry delay period to elapse before resending the cross-invalidate command.
• Cache state change requests are granted upon receiving a cross-invalidate accept response from the caches.

Potential Applications

This technology could be applied in high-performance computing systems, data centers, and server environments where cache line contention management is crucial for optimizing system performance.

Problems Solved

1. Efficient management of cache line contention in a multiprocessing system. 2. Minimizing delays and conflicts in cache operations to improve overall system performance.

Benefits

1. Enhanced system performance and responsiveness. 2. Reduced cache conflicts and contention. 3. Improved scalability in multiprocessing environments.

Potential Commercial Applications

Optimizing cache performance in cloud computing environments Improving data processing speed in server farms Enhancing the efficiency of high-performance computing clusters

Possible Prior Art

One possible prior art in cache line contention management is the use of cache coherence protocols like MESI (Modified, Exclusive, Shared, Invalid) to maintain cache consistency in multiprocessor systems.

What are the specific technical details of the cross-invalidate command and response mechanism described in the patent application?

The patent application does not provide detailed technical specifications of the cross-invalidate command and response mechanism. It focuses more on the overall process of cache line contention management in a multiprocessing system.

How does this technology compare to existing cache management techniques in terms of performance and scalability?

The patent application does not directly compare this technology to existing cache management techniques in terms of performance and scalability. It primarily focuses on the novel approach of using cross-invalidate commands to manage cache line contention.

Original Abstract Submitted

embodiments are for processor cross-core cache line contention management. a computer-implemented method includes sending a cross-invalidate command to one or more caches based on receiving a cache state change request for a cache line in a symmetric multiprocessing system and determining a retry delay based on receiving a cross-invalidate reject response from at least one of the one or more caches. the computer-implemented method also includes waiting until a retry delay period associated with the retry delay has elapsed to resend the cross-invalidate command to the one or more caches and granting the cache state change request for the cache line based on receiving a cross-invalidate accept response from the one or more caches.