Invention Application
- Patent Title: METHODS, SYSTEMS, AND APPARATUSES FOR PRECISE LAST BRANCH RECORD EVENT LOGGING
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Application No.: US17214823Application Date: 2021-03-27
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Publication No.: US20220308882A1Publication Date: 2022-09-29
- Inventor: JONATHAN COMBS , MICHAEL CHYNOWETH , BEEMAN STRONG , CHARLIE HEWETT , PATRICK KONSOR , VIDISHA CHIRRA , ASAVARI PARANJAPE , AHMAD YASIN
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Main IPC: G06F9/38
- IPC: G06F9/38 ; G06F12/0802 ; G06F11/30 ; G06F11/34

Abstract:
Systems, methods, and apparatuses relating to circuitry to implement precise last branch record event logging in a processor are described. In one embodiment, a hardware processor core includes an execution circuit to execute instructions, a retirement circuit to retire executed instructions, a status register, and a last branch record circuit to, in response to retirement by the retirement circuit of a first taken branch instruction, start a cycle timer and a performance monitoring event counter, and in response to retirement by the retirement circuit of a second taken branch instruction, that is a next taken branch instruction in program order after the first taken branch instruction, write values from the cycle timer and the performance monitoring event counter into a first entry in the status register and clear the values from the cycle timer and the performance monitoring event counter.
Public/Granted literature
- US12288072B2 Methods, systems, and apparatuses for precise last branch record event logging Public/Granted day:2025-04-29
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