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GNU/Linux |
Debian 6.0.1(Squeeze) |
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perf_2.6.32-top(1) |
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perf-top − System profiling tool.
perf top [−e <EVENT> | −−event=EVENT] [<options>]
This command generates and displays a performance counter profile in realtime.
−a, −−all−cpus
System−wide collection. (default)
−c <count>, −−count=<count>
Event period to sample.
−C <cpu>, −−CPU=<cpu>
CPU to profile.
−d <seconds>, −−delay=<seconds>
Number of seconds to delay between refreshes.
−e <event>, −−event=<event>
Select the PMU event. Selection can be a symbolic event name (use perf list to list all events) or a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a hexadecimal event descriptor.
−E <entries>, −−entries=<entries>
Display this many functions.
−f <count>, −−count−filter=<count>
Only display functions with more events than this.
−F <freq>, −−freq=<freq>
Profile at this frequency.
−i, −−inherit
Child tasks inherit counters, only makes sens with −p option.
−k <path>, −−vmlinux=<path>
Path to vmlinux. Required for annotation functionality.
−m <pages>, −−mmap−pages=<pages>
Number of mmapped data pages.
−p <pid>, −−pid=<pid>
Profile events on existing pid.
−r <priority>, −−realtime=<priority>
Collect data with this RT SCHED_FIFO priority.
−s <symbol>, −−sym−annotate=<symbol>
Annotate this symbol. Requires −k option.
−v, −−verbose
Be more verbose (show counter open errors, etc).
−z, −−zero
Zero history across display updates.
[d]
Display refresh delay.
[e]
Number of entries to display.
[E]
Event to display when multiple counters are active.
[f]
Profile display filter (>= hit count).
[F]
Annotation display filter (>= % of total).
[s]
Annotate symbol.
[S]
Stop annotation, return to full profile display.
[w]
Toggle between weighted sum and individual count[E]r profile.
[z]
Toggle event count zeroing across display updates.
[qQ]
Quit.
Pressing any unmapped key displays a menu, and prompts for input.
perf_2.6.32-stat(1), perf_2.6.32-list(1)
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perf_2.6.32-top(1) | |