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diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt new file mode 100644 index 00000000..4a5680cb --- /dev/null +++ b/tools/perf/Documentation/perf-top.txt @@ -0,0 +1,193 @@ +perf-top(1) +=========== + +NAME +---- +perf-top - System profiling tool. + +SYNOPSIS +-------- +[verse] +'perf top' [-e <EVENT> | --event=EVENT] [<options>] + +DESCRIPTION +----------- +This command generates and displays a performance counter profile in real time. + + +OPTIONS +------- +-a:: +--all-cpus:: + System-wide collection. (default) + +-c <count>:: +--count=<count>:: + Event period to sample. + +-C <cpu-list>:: +--cpu=<cpu>:: +Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a +comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. +Default is to monitor all CPUS. + +-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. + +-g:: +--group:: + Put the counters into a counter group. + +-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 Process ID (comma separated list). + +-t <tid>:: +--tid=<tid>:: + Profile events on existing thread ID (comma separated list). + +-u:: +--uid=:: + Record events in threads owned by uid. Name or number. + +-r <priority>:: +--realtime=<priority>:: + Collect data with this RT SCHED_FIFO priority. + +-s <symbol>:: +--sym-annotate=<symbol>:: + Annotate this symbol. + +-K:: +--hide_kernel_symbols:: + Hide kernel symbols. + +-U:: +--hide_user_symbols:: + Hide user symbols. + +-D:: +--dump-symtab:: + Dump the symbol table used for profiling. + +-v:: +--verbose:: + Be more verbose (show counter open errors, etc). + +-z:: +--zero:: + Zero history across display updates. + +-s:: +--sort:: + Sort by key(s): pid, comm, dso, symbol, parent + +-n:: +--show-nr-samples:: + Show a column with the number of samples. + +--show-total-period:: + Show a column with the sum of periods. + +--dsos:: + Only consider symbols in these dsos. + +--comms:: + Only consider symbols in these comms. + +--symbols:: + Only consider these symbols. + +-M:: +--disassembler-style=:: Set disassembler style for objdump. + +--source:: + Interleave source code with assembly code. Enabled by default, + disable with --no-source. + +--asm-raw:: + Show raw instruction encoding of assembly instructions. + +-G [type,min,order]:: +--call-graph:: + Display call chains using type, min percent threshold and order. + type can be either: + - flat: single column, linear exposure of call chains. + - graph: use a graph tree, displaying absolute overhead rates. + - fractal: like graph, but displays relative rates. Each branch of + the tree is considered as a new profiled object. + + order can be either: + - callee: callee based call graph. + - caller: inverted caller based call graph. + + Default: fractal,0.5,callee. + +INTERACTIVE PROMPTING KEYS +-------------------------- + +[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. + +[z]:: + Toggle event count zeroing across display updates. + +[qQ]:: + Quit. + +Pressing any unmapped key displays a menu, and prompts for input. + + +SEE ALSO +-------- +linkperf:perf-stat[1], linkperf:perf-list[1] |