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authorFrederic Weisbecker <fweisbec@gmail.com>2009-02-19 21:13:12 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-20 11:36:24 +0100
commitf9349a8f978929a0c71d2c42ae299f7d462c239d (patch)
treee5d010a27078993709fd286f358122886cbbc3bc /drivers/char
parent64b36ca7f408e0bd45487c8c28f168f11f3b6dcd (diff)
tracing/function-graph-tracer: make set_graph_function file support ftrace regex
Impact: trace only functions matching a pattern The set_graph_function file let one to trace only one or several chosen functions and follow all their code flow. Currently, only a constant function name is allowed so this patch allows the ftrace_regex functions: - matches all functions that end with "name": echo *name > set_graph_function - matches all functions that begin with "name": echo name* > set_graph_function - matches all functions that contains "name": echo *name* > set_graph_function Example: echo mutex* > set_graph_function 0) | mutex_lock_nested() { 0) 0.563 us | __might_sleep(); 0) 2.072 us | } 0) | mutex_unlock() { 0) 1.036 us | __mutex_unlock_slowpath(); 0) 2.433 us | } 0) | mutex_unlock() { 0) 0.691 us | __mutex_unlock_slowpath(); 0) 1.787 us | } 0) | mutex_lock_interruptible_nested() { 0) 0.548 us | __might_sleep(); 0) 1.945 us | } Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char')
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