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function-graph: add option to calculate graph time or not

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graph time is the time that a function is executing another function.
Thus if function A calls B, if graph-time is set, then the time for
A includes B. This is the default behavior. But if graph-time is off,
then the time spent executing B is subtracted from A.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt
2009-03-24 23:17:58 -04:00
parent cafb168a1c
commit a2a16d6a31
5 changed files with 29 additions and 8 deletions
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3
include/linux/ftrace.h
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@@ -365,6 +365,7 @@ struct ftrace_ret_stack {
unsigned long ret;
unsigned long func;
unsigned long long calltime;
unsigned long long subtime;
};
/*
@@ -376,8 +377,6 @@ extern void return_to_handler(void);
extern int
ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth);
extern void
ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret);
/*
* Sometimes we don't want to trace a function with the function