TRACE-CMD-HIST(1)

✨ TRACE-CMD-HIST(1) ✨

okay bestie so this is a page from the libtracefs Manual, and it's about trace-cmd-hist — the histogram era of your trace life 💅

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🌸 NAME 🌸

trace-cmd-hist — show histogram of events in trace.dat file

🦋 SYNOPSIS 🦋

trace-cmd hist [OPTIONS][input-file]

💖 DESCRIPTION 💖

So trace-cmd(1) hist (yep, it's a subcommand of trace-cmd(1), iykyk) literally displays a histogram form from the trace.dat file. Instead of showing you the events in the order they happened like some chronological basic b*tch, it builds 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. It's giving main character energy for your event counts, fr fr.

👑 OPTIONS 👑

• -i input-file — by default, trace-cmd hist reads the file trace.dat. But the -i option opens up the given input-file instead 💫. Note: the input file may also be specified as the last item on the command line. (Two ways to say the same thing, we love options.)
• -P — want to compact all events and show the call graphs by ignoring tasks and different PIDs? Add the -P and it does exactly that 🫶. Instead of showing the task name, it groups all chains together and shows <all pids>. Iconic behavior honestly.

🌈 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)

(the whole squad, no cap 🎀)

🎀 AUTHOR 🎀

Written by Steven Rostedt, <rostedt@goodmis.org[1]> — shoutout to the legend himself 💜

🧚 RESOURCES 🧚

https://git.kernel.org/pub/scm/utils/trace-cmd/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).

💀 NOTES 💀

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

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ok that's the whole page, nothing skipped, everything intact — the vibes are new but the facts are untouchable 💅

and that's a wrap, bestie 🍓 this gorgeous little page comes to you from libtracefs, dated 03/09/2026, and it's filed under TRACE-CMD-HIST(1) — periodt ✨🦋