| TRACE-CMD-RESET(1) |
| ================== |
| |
| NAME |
| ---- |
| trace-cmd-reset - turn off all Ftrace tracing to bring back full performance |
| |
| SYNOPSIS |
| -------- |
| *trace-cmd reset* ['OPTIONS'] |
| |
| DESCRIPTION |
| ----------- |
| The trace-cmd(1) reset command turns off all tracing of Ftrace. This will |
| bring back the performance of the system before tracing was enabled. This is |
| necessary since 'trace-cmd-record(1)', 'trace-cmd-stop(1)' and |
| 'trace-cmd-extract(1)' do not disable the tracer, event after the data has |
| been pulled from the buffers. The rational is that the user may want to |
| manually enable the tracer with the Ftrace pseudo file system, or examine other |
| parts of Ftrace to see what trace-cmd did. After the reset command happens, |
| the data in the ring buffer, and the options that were used are all lost. |
| |
| OPTIONS |
| ------- |
| *-b* 'buffer_size':: |
| When the kernel boots, the Ftrace ring buffer is of a minimal size (3 |
| pages per CPU). The first time the tracer is used, the ring buffer size |
| expands to what it was set for (default 1.4 Megs per CPU). |
| |
| If no more tracing is to be done, this option allows you to shrink the |
| ring buffer down to free up available memory. |
| |
| trace-cmd reset -b 1 |
| |
| |
| 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-split(1), |
| trace-cmd-list(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). |
| |