International Business Machines Corporation

Hung Doan

Guy L Guthrie

Derek E Williams

Hugh Shen

Sanjeev Ghai

In a processing unit, a processor core executes instructions in a plurality of simultaneous hardware threads, where multiple of the plurality of hardware threads concurrently execute memory transactions. A transactional memory circuit in the processing unit tracks transaction footprints of the memory transactions of the multiple hardware thread. In response to detecting failure of a given memory transaction of one of the plurality of multiple threads due to an overflow condition, the transactional memory circuit transitions to a throttled operating mode and reduces a number of hardware threads permitted to concurrently execute memory transactions.

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Austin, TX, United States of America

Hung Doan