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Subject[PATCH 5/5] tracing, function_graph: Add context-info support for function_graph tracer
Date
The function_graph tracer does not follow global context-info option.
Adding TRACE_ITER_CONTEXT_INFO trace_flags check to enable it.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
kernel/trace/trace_functions_graph.c | 53 ++++++++++++++++++++--------------
1 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 1da5b97..e8d6bb5 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -613,28 +613,30 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
addr >= (unsigned long)__irqentry_text_end)
return TRACE_TYPE_UNHANDLED;

- /* Absolute time */
- if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
- ret = print_graph_abs_time(iter->ts, s);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
+ /* Absolute time */
+ if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
+ ret = print_graph_abs_time(iter->ts, s);
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+ }

- /* Cpu */
- if (flags & TRACE_GRAPH_PRINT_CPU) {
- ret = print_graph_cpu(s, cpu);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- }
+ /* Cpu */
+ if (flags & TRACE_GRAPH_PRINT_CPU) {
+ ret = print_graph_cpu(s, cpu);
+ if (ret == TRACE_TYPE_PARTIAL_LINE)
+ return TRACE_TYPE_PARTIAL_LINE;
+ }

- /* Proc */
- if (flags & TRACE_GRAPH_PRINT_PROC) {
- ret = print_graph_proc(s, pid);
- if (ret == TRACE_TYPE_PARTIAL_LINE)
- return TRACE_TYPE_PARTIAL_LINE;
- ret = trace_seq_printf(s, " | ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ /* Proc */
+ if (flags & TRACE_GRAPH_PRINT_PROC) {
+ ret = print_graph_proc(s, pid);
+ if (ret == TRACE_TYPE_PARTIAL_LINE)
+ return TRACE_TYPE_PARTIAL_LINE;
+ ret = trace_seq_printf(s, " | ");
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+ }
}

/* No overhead */
@@ -710,8 +712,9 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s,
{
int ret = -1;

- if (!(flags & TRACE_GRAPH_PRINT_DURATION))
- return TRACE_TYPE_HANDLED;
+ if (!(flags & TRACE_GRAPH_PRINT_DURATION) ||
+ !(trace_flags & TRACE_ITER_CONTEXT_INFO))
+ return TRACE_TYPE_HANDLED;

/* No real adata, just filling the column with spaces */
switch (duration) {
@@ -879,6 +882,9 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
return TRACE_TYPE_PARTIAL_LINE;
}

+ if (!(trace_flags & TRACE_ITER_CONTEXT_INFO))
+ return 0;
+
/* Absolute time */
if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
ret = print_graph_abs_time(iter->ts, s);
@@ -1346,6 +1352,9 @@ void print_graph_headers_flags(struct seq_file *s, u32 flags)
{
struct trace_iterator *iter = s->private;

+ if (!(trace_flags & TRACE_ITER_CONTEXT_INFO))
+ return;
+
if (trace_flags & TRACE_ITER_LATENCY_FMT) {
/* print nothing if the buffers are empty */
if (trace_empty(iter))
--
1.7.1


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