luck/tmp_suning_uos_patched
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function-graph: moved the timestamp from arch to generic code

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This patch move the timestamp from happening in the arch specific
code into the general code. This allows for better control by the tracer
to time manipulation.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt 2009-03-23 23:38:49 -04:00
parent 098335215a
commit 5d1a03dc54
3 changed files with 7 additions and 10 deletions
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6
arch/x86/kernel/ftrace.c
View File

@ -410,7 +410,6 @@ int ftrace_disable_ftrace_graph_caller(void)
void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
{
unsigned long old;
unsigned long long calltime;
int faulted;
struct ftrace_graph_ent trace;
unsigned long return_hooker = (unsigned long)
@ -453,10 +452,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
return;
}
calltime = trace_clock_local();
if (ftrace_push_return_trace(old, calltime,
self_addr, &trace.depth) == -EBUSY) {
if (ftrace_push_return_trace(old, self_addr, &trace.depth) == -EBUSY) {
*parent = old;
return;
}

3
include/linux/ftrace.h
View File

@ -369,8 +369,7 @@ struct ftrace_ret_stack {
extern void return_to_handler(void);
extern int
ftrace_push_return_trace(unsigned long ret, unsigned long long time,
unsigned long func, int *depth);
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);

8
kernel/trace/trace_functions_graph.c
View File

@ -57,9 +57,9 @@ static struct tracer_flags tracer_flags = {
/* Add a function return address to the trace stack on thread info.*/
int
ftrace_push_return_trace(unsigned long ret, unsigned long long time,
unsigned long func, int *depth)
ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth)
{
unsigned long long calltime;
int index;
if (!current->ret_stack)
@ -71,11 +71,13 @@ ftrace_push_return_trace(unsigned long ret, unsigned long long time,
return -EBUSY;
}
calltime = trace_clock_local();
index = ++current->curr_ret_stack;
barrier();
current->ret_stack[index].ret = ret;
current->ret_stack[index].func = func;
current->ret_stack[index].calltime = time;
current->ret_stack[index].calltime = calltime;
*depth = index;
return 0;