December 2017
Intermediate to advanced
718 pages
23h 14m
English
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13.4. Monitoring Hardware Events
13.4.1. Perf
The perf framework [8], also referred to as perf_events, is a performance monitoring tool and event tracer closely integrated with the Linux OS kernel. Its primary functionality is based on the sys_perf_event_open [9] system call introduced in the 2.6 series of Linux. The system call enables access to special-purpose registers of the CPU that may be configured to collect the counts of specific hardware-level events. These events may vary from processor to processor, but their main categories include the following:
• Cache related: misses and references issued. These may be further grouped by cache level (L1 through L3), cache type (instruction and data), and access type (loads and stores).
• Translation ...
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