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TRACE-CMD-SNAPSHOT(1) libtracefs Manual TRACE-CMD-SNAPSHOT(1)
trace-cmd-snapshot - take, reset, free, or show a Ftrace kernel snapshot
trace-cmd snapshot [OPTIONS]
The trace-cmd(1) snapshot controls or displays the Ftrace Linux kernel snapshot feature (if the kernel supports it). This is useful to "freeze" an instance of a live trace but without stopping the trace. trace-cmd start -p function trace-cmd snapshot -s trace-cmd snapshot [ dumps the content of buffer at 'trace-cmd snapshot -s' ] trace-cmd snapshot -s trace-cmd snapshot [ dumps the new content of the buffer at the last -s operation ]
-s Take a snapshot of the currently running buffer. -r Clear out the buffer. -f Free the snapshot buffer. The buffer takes up memory inside the kernel. It is best to free it when not in use. The first -s operation will allocate it if it is not already allocated. -c cpu Operate on a per cpu snapshot (may not be fully supported by all kernels) -B buf If a buffer instance was created, then the -B option will operate on the snapshot within the buffer.
trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1)
Written by Steven Rostedt, <[email protected][1]>
https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).
1. [email protected] mailto:[email protected]
This page is part of the trace-cmd (a front-end for Ftrace)
project. Information about the project can be found at
⟨https://www.trace-cmd.org/⟩. If you have a bug report for this
manual page, see ⟨https://www.trace-cmd.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git⟩ on
2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-02-22.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to [email protected]
libtracefs 09/24/2023 TRACE-CMD-SNAPSHOT(1)