| TRACE-CMD-HIST(1) |
| ================== |
| |
| NAME |
| ---- |
| trace-cmd-hist - show histogram of events in trace.dat file |
| |
| SYNOPSIS |
| -------- |
| *trace-cmd hist* ['OPTIONS']['input-file'] |
| |
| DESCRIPTION |
| ----------- |
| The trace-cmd(1) hist displays a histogram form from the trace.dat file. |
| Instead of showing the events as they were ordered, it creates a histogram |
| that can be displayed per task or for all tasks where the most common |
| events appear first. It uses the function tracer and call stacks that it |
| finds to try to put together a call graph of the events. |
| |
| OPTIONS |
| ------- |
| *-i* 'input-file':: |
| By default, trace-cmd hist will read the file 'trace.dat'. But the *-i* |
| option open up the given 'input-file' instead. Note, the input file may |
| also be specified as the last item on the command line. |
| |
| *-P*:: |
| To compact all events and show the call graphs by ignoring tasks |
| and different PIDs, add the *-P* to do so. Instead of showing the |
| task name, it will group all chains together and show "<all pids>". |
| |
| SEE ALSO |
| -------- |
| trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), |
| trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), |
| trace-cmd-split(1), trace-cmd-listen(1) |
| |
| AUTHOR |
| ------ |
| Written by Steven Rostedt, <rostedt@goodmis.org> |
| |
| RESOURCES |
| --------- |
| git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git |
| |
| COPYING |
| ------- |
| Copyright \(C) 2010 Red Hat, Inc. Free use of this software is granted under |
| the terms of the GNU Public License (GPL). |
| |
