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author | Steven Rostedt <srostedt@redhat.com> | 2009-03-25 03:17:58 (GMT) |
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committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-25 03:41:11 (GMT) |
commit | a2a16d6a3156ef7309ca7328a20c35df9418e670 (patch) | |
tree | 8f21d9c56eb34f9bd1057929661c96d04329dd69 /kernel/trace/trace_functions_graph.c | |
parent | cafb168a1c92e4c9e1731fe3d666c39611762c49 (diff) | |
download | linux-fsl-qoriq-a2a16d6a3156ef7309ca7328a20c35df9418e670.tar.xz |
function-graph: add option to calculate graph time or not
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>
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
-rw-r--r-- | kernel/trace/trace_functions_graph.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 85bba0f..10f6ad7 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -78,13 +78,14 @@ ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth) current->ret_stack[index].ret = ret; current->ret_stack[index].func = func; current->ret_stack[index].calltime = calltime; + current->ret_stack[index].subtime = 0; *depth = index; return 0; } /* Retrieve a function return address to the trace stack on thread info.*/ -void +static void ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret) { int index; @@ -104,9 +105,6 @@ ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret) trace->calltime = current->ret_stack[index].calltime; trace->overrun = atomic_read(¤t->trace_overrun); trace->depth = index; - barrier(); - current->curr_ret_stack--; - } /* @@ -121,6 +119,8 @@ unsigned long ftrace_return_to_handler(void) ftrace_pop_return_trace(&trace, &ret); trace.rettime = trace_clock_local(); ftrace_graph_return(&trace); + barrier(); + current->curr_ret_stack--; if (unlikely(!ret)) { ftrace_graph_stop(); |