Facilitating transaction completion subsequent to repeated aborts of the transaction
First Claim
1. A method of facilitating processing within a computing environment, said method comprising:
- tracking, by a processor of the computing environment, a number of times a transaction executing within the processor aborts, the transaction effectively delaying committing transactional stores to main memory until completion of a selected transaction, and the tracking employing a counter within the processor to track the number of aborts of the transaction;
determining whether the transaction has successfully completed, and based on the transaction successfully completing, automatically resetting the counter to a predefined value;
based on the transaction aborting, automatically resetting the counter to the predefined value based on an interruption action, wherein the automatically resetting the counter to the predefined value is based on one of the following;
reaching by the counter a threshold number of aborts for the transaction causing an interrupt to be presented for the transaction, the counter to track the number of aborts of the transaction;
determining the abort of the transaction is due to an interruption; and
based on the transaction aborting for a reason other than an interruption, determining whether the counter has reached the threshold number of aborts, and based on the counter not reaching the threshold number of aborts, re-executing the transaction via a transaction begin instruction.
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Accused Products
Abstract
Processing of transactions within a computing environment is facilitated by taking actions to increase the chances of successfully executing a transaction. A counter is maintained that provides a count of how often a transaction has aborted. The counter increments the count each time the transaction is aborted, and it is reset to zero upon successful completion of the transaction or an interruption leading to no more re-executions of the transaction. If the count reaches a threshold value, then an interrupt is presented and transaction execution is unsuccessful. However, before the count reaches the threshold, a number of actions may be taken to increase the chances of successfully executing the transaction. These actions include actions to be performed within the processor executing the transaction, and/or actions to be performed against conflicting processors.
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Citations
9 Claims
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1. A method of facilitating processing within a computing environment, said method comprising:
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tracking, by a processor of the computing environment, a number of times a transaction executing within the processor aborts, the transaction effectively delaying committing transactional stores to main memory until completion of a selected transaction, and the tracking employing a counter within the processor to track the number of aborts of the transaction; determining whether the transaction has successfully completed, and based on the transaction successfully completing, automatically resetting the counter to a predefined value; based on the transaction aborting, automatically resetting the counter to the predefined value based on an interruption action, wherein the automatically resetting the counter to the predefined value is based on one of the following; reaching by the counter a threshold number of aborts for the transaction causing an interrupt to be presented for the transaction, the counter to track the number of aborts of the transaction; determining the abort of the transaction is due to an interruption; and based on the transaction aborting for a reason other than an interruption, determining whether the counter has reached the threshold number of aborts, and based on the counter not reaching the threshold number of aborts, re-executing the transaction via a transaction begin instruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification