trace-cmd-stack - read, enable or disable Ftrace Linux kernel stack tracing.
The trace-cmd(1) stack enables the Ftrace stack tracer within the kernel. The stack tracer enables the function tracer and at each function call within the kernel, the stack is checked. When a new maximum usage stack is discovered, it is recorded.
When no option is used, the current stack is displayed.
To enable the stack tracer, use the option --start, and to disable the stack tracer, use the option --stop. The output will be the maximum stack found since the start was enabled.
Use --reset to reset the stack counter to zero.
User --verbose[=level] to set the log level. Supported log levels are "none", "critical", "error", "warning", "info", "debug", "all" or their identifiers "0", "1", "2", "3", "4", "5", "6". Setting the log level to specific value enables all logs from that and all previous levels. The level will default to "info" if one is not specified.
Written by Steven Rostedt, <email@example.com>
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).