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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6cff0e8dba
By relying on logic in dso__load_kernel_sym(), we can automatically load vmlinux. The only thing which needs to be adjusted, is how --sym-annotate option is handled - now we can't rely on vmlinux been loaded until full successful pass of dso__load_vmlinux(), but that's not the case if we'll do sym_filter_entry setup in symbol_filter(). So move this step right after event__process_sample() where we know the whole dso__load_kernel_sym() pass is done. By the way, though conceptually similar `perf top` still can't annotate userspace - see next patches with fixes. Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1265223128-11786-9-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
126 lines
2.1 KiB
Plaintext
126 lines
2.1 KiB
Plaintext
perf-top(1)
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===========
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NAME
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----
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perf-top - System profiling tool.
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SYNOPSIS
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--------
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[verse]
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'perf top' [-e <EVENT> | --event=EVENT] [<options>]
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DESCRIPTION
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-----------
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This command generates and displays a performance counter profile in realtime.
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OPTIONS
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-------
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-a::
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--all-cpus::
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System-wide collection. (default)
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-c <count>::
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--count=<count>::
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Event period to sample.
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-C <cpu>::
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--CPU=<cpu>::
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CPU to profile.
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-d <seconds>::
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--delay=<seconds>::
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Number of seconds to delay between refreshes.
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-e <event>::
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--event=<event>::
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Select the PMU event. Selection can be a symbolic event name
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(use 'perf list' to list all events) or a raw PMU
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event (eventsel+umask) in the form of rNNN where NNN is a
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hexadecimal event descriptor.
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-E <entries>::
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--entries=<entries>::
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Display this many functions.
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-f <count>::
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--count-filter=<count>::
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Only display functions with more events than this.
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-F <freq>::
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--freq=<freq>::
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Profile at this frequency.
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-i::
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--inherit::
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Child tasks inherit counters, only makes sens with -p option.
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-k <path>::
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--vmlinux=<path>::
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Path to vmlinux. Required for annotation functionality.
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-m <pages>::
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--mmap-pages=<pages>::
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Number of mmapped data pages.
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-p <pid>::
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--pid=<pid>::
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Profile events on existing pid.
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-r <priority>::
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--realtime=<priority>::
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Collect data with this RT SCHED_FIFO priority.
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-s <symbol>::
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--sym-annotate=<symbol>::
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Annotate this symbol.
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-v::
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--verbose::
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Be more verbose (show counter open errors, etc).
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-z::
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--zero::
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Zero history across display updates.
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INTERACTIVE PROMPTING KEYS
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--------------------------
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[d]::
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Display refresh delay.
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[e]::
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Number of entries to display.
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[E]::
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Event to display when multiple counters are active.
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[f]::
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Profile display filter (>= hit count).
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[F]::
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Annotation display filter (>= % of total).
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[s]::
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Annotate symbol.
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[S]::
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Stop annotation, return to full profile display.
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[w]::
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Toggle between weighted sum and individual count[E]r profile.
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[z]::
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Toggle event count zeroing across display updates.
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[qQ]::
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Quit.
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Pressing any unmapped key displays a menu, and prompts for input.
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SEE ALSO
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--------
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linkperf:perf-stat[1], linkperf:perf-list[1]
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