Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 1/4] tracing: adding ftrace events for graph tracer | Date | Mon, 22 Feb 2010 13:56:59 +0100 |
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hi,
this patch adds ftrace events for graph tracer, so the graph output could be shared within other tracers.
wbr, jirka
Signed-off-by: Jiri Olsa <jolsa@redhat.com> --- kernel/trace/trace.h | 3 ++- kernel/trace/trace_functions_graph.c | 25 ++++++++++++++++++++++--- 2 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index b477fce..1feda87 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -490,7 +490,8 @@ extern int trace_clock_id; /* Standard output formatting function used for function return traces */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER -extern enum print_line_t print_graph_function(struct trace_iterator *iter); +extern enum print_line_t print_graph_function(struct trace_iterator *iter, + int flags); extern enum print_line_t trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 616b135..41cec17 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -38,7 +38,7 @@ struct fgraph_data { #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 #define TRACE_GRAPH_PRINT_PROC 0x8 #define TRACE_GRAPH_PRINT_DURATION 0x10 -#define TRACE_GRAPH_PRINT_ABS_TIME 0X20 +#define TRACE_GRAPH_PRINT_ABS_TIME 0x20 static struct tracer_opt trace_opts[] = { /* Display overruns? (for self-debug purpose) */ @@ -985,7 +985,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, enum print_line_t -print_graph_function(struct trace_iterator *iter) +print_graph_function(struct trace_iterator *iter, int flags) { struct ftrace_graph_ent_entry *field; struct fgraph_data *data = iter->private; @@ -1143,6 +1143,16 @@ static void graph_trace_close(struct trace_iterator *iter) } } +static struct trace_event graph_trace_entry_event = { + .type = TRACE_GRAPH_ENT, + .trace = print_graph_function, +}; + +static struct trace_event graph_trace_ret_event = { + .type = TRACE_GRAPH_RET, + .trace = print_graph_function, +}; + static struct tracer graph_trace __read_mostly = { .name = "function_graph", .open = graph_trace_open, @@ -1152,7 +1162,6 @@ static struct tracer graph_trace __read_mostly = { .wait_pipe = poll_wait_pipe, .init = graph_trace_init, .reset = graph_trace_reset, - .print_line = print_graph_function, .print_header = print_graph_headers, .flags = &tracer_flags, #ifdef CONFIG_FTRACE_SELFTEST @@ -1164,6 +1173,16 @@ static __init int init_graph_trace(void) { max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1); + if (!register_ftrace_event(&graph_trace_entry_event)) { + pr_warning("Warning: could not register graph trace events\n"); + return 1; + } + + if (!register_ftrace_event(&graph_trace_ret_event)) { + pr_warning("Warning: could not register graph trace events\n"); + return 1; + } + return register_tracer(&graph_trace); } -- 1.6.6
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