TRACE−CMD−HIST - Online Linux Manual PageSection : 1
Updated : 03/29/2021
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NAMEtrace-cmd-hist − show histogram of events in trace​.dat file

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SYNOPSIStrace−cmd hist [OPTIONS][input−file]

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DESCRIPTIONThe 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​.

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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>"​.

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SEE ALSOtrace−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)

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AUTHORWritten by Steven Rostedt, <rostedt@goodmis​.org​[1]>

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RESOURCEShttps://git​.kernel​.org/pub/scm/utils/trace−cmd/trace−cmd​.git/

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COPYINGCopyright (C) 2010 Red Hat, Inc​. Free use of this software is granted under the terms of the GNU Public License (GPL)​.

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NOTES 1. rostedt@goodmis.org ­mailto:rostedt@goodmis.org 0

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