Event counter checkpointing and restoring

A method comprising:

• storing, prior to a transactional execution of a processor, a value of a first event counter programmed to count events that occur during execution within the processor;
• restoring the first event counter to the stored value after aborting the transactional execution;
• and
• determining, in response to aborting of the transactional execution, a number of the events that occurred during the transactional execution based on the stored value and a value of a second event counter that counts events prior to and during the transactional execution, wherein the second event counter is to increment without resetting after the transactional execution is aborted.

A non-transitory machine-readable storage medium to store instructions that, if executed, result in a processor performing operations comprising:

• storing, prior to a transactional execution of the processor, a value of a first event counter programmed to count events that occur during execution within the processor;
• restoring the first event counter to the stored value after the transactional execution is aborted;
• and
• determining, in response to aborting of the transactional execution, a number of the events that occurred during the transactional execution based on the stored value and a value of a second event counter that counts events prior to and during the transactional execution, wherein the second event counter is to increment without resetting after the transactional execution is aborted.