Processor with sequences of processor instructions for locked memory updates
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 12, 1996
Grant Date -
N/A
app pub date -
Jun 17, 1994
filing date -
Jun 17, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system and method for executing sequences of instructions which can be used to access a memory location in a locked fashion. The first instruction specifies an address and sets a lock register which disables interrupts until it is cleared. The second instruction specifies an address and clears the lock register. The second instruction is not executed if the lock register was already cleared and doesn't update memory if the cache line of the first address is no longer valid. If the second address is not cacheable, the instructions are off-loaded to the bus interface and the results of the update are used to update the processor state. The present invention allows locked memory updates and process synchronization without locking of arbitrary duration of the entire shared data structure. The calculation and update of the data structure may continue after a context switch. The present invention is compatible with a wide range of cache-coherence protocols.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully