diff options
author | Steven Rostedt <rostedt@goodmis.org> | 2008-11-26 00:16:26 -0500 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-11-26 06:52:56 +0100 |
commit | 660c7f9be96321fc80026d76411bd15e6f418a72 (patch) | |
tree | 5ae61fa51c9e9ce7b42f64cfaa168cd09439ac3d /kernel/trace/trace_functions_graph.c | |
parent | e53a6319cca69111c1643dc9f18f4465d7f1cbf0 (diff) |
ftrace: add thread comm to function graph tracer
Impact: enhancement to function graph tracer
Export the trace_find_cmdline so the function graph tracer can
use it to print the comms of the threads.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
-rw-r--r-- | kernel/trace/trace_functions_graph.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index b6f0cc2a00c..bbb81e7b6c4 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -32,29 +32,40 @@ static pid_t last_pid = -1; static int graph_trace_init(struct trace_array *tr) { - int cpu; + int cpu, ret; + for_each_online_cpu(cpu) tracing_reset(tr, cpu); - return register_ftrace_graph(&trace_graph_return, + ret = register_ftrace_graph(&trace_graph_return, &trace_graph_entry); + if (ret) + return ret; + tracing_start_cmdline_record(); + + return 0; } static void graph_trace_reset(struct trace_array *tr) { - unregister_ftrace_graph(); + tracing_stop_cmdline_record(); + unregister_ftrace_graph(); } /* If the pid changed since the last trace, output this event */ static int verif_pid(struct trace_seq *s, pid_t pid) { + char *comm; + if (last_pid != -1 && last_pid == pid) return 1; last_pid = pid; - return trace_seq_printf(s, "\n------------8<---------- thread %d" + comm = trace_find_cmdline(pid); + + return trace_seq_printf(s, "\n------------8<---------- thread %s-%d" " ------------8<----------\n\n", - pid); + comm, pid); } static enum print_line_t |