6 perf-top - System profiling tool.
11 'perf top' [-e <EVENT> | --event=EVENT] [<options>]
15 This command generates and displays a performance counter profile in realtime.
22 System-wide collection. (default)
26 Event period to sample.
34 Number of seconds to delay between refreshes.
38 Select the PMU event. Selection can be a symbolic event name
39 (use 'perf list' to list all events) or a raw PMU
40 event (eventsel+umask) in the form of rNNN where NNN is a
41 hexadecimal event descriptor.
45 Display this many functions.
48 --count-filter=<count>::
49 Only display functions with more events than this.
53 Profile at this frequency.
57 Child tasks inherit counters, only makes sens with -p option.
61 Path to vmlinux. Required for annotation functionality.
64 --mmap-pages=<pages>::
65 Number of mmapped data pages.
69 Profile events on existing pid.
72 --realtime=<priority>::
73 Collect data with this RT SCHED_FIFO priority.
76 --sym-annotate=<symbol>::
77 Annotate this symbol. Requires -k option.
81 Be more verbose (show counter open errors, etc).
85 Zero history across display updates.
87 INTERACTIVE PROMPTING KEYS
88 --------------------------
91 Display refresh delay.
94 Number of entries to display.
97 Event to display when multiple counters are active.
100 Profile display filter (>= hit count).
103 Annotation display filter (>= % of total).
109 Stop annotation, return to full profile display.
112 Toggle between weighted sum and individual count[E]r profile.
115 Toggle event count zeroing across display updates.
120 Pressing any unmapped key displays a menu, and prompts for input.
125 linkperf:perf-stat[1], linkperf:perf-list[1]