diff options
| -rw-r--r-- | kernel/trace/ftrace.c | 19 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 11 | ||||
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 13 |
4 files changed, 35 insertions, 10 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index b0623ac..e763848 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -243,6 +243,11 @@ static void ftrace_sync_ipi(void *data) #ifdef CONFIG_FUNCTION_GRAPH_TRACER static void update_function_graph_func(void); + +/* Both enabled by default (can be cleared by function_graph tracer flags */ +static bool fgraph_sleep_time = true; +static bool fgraph_graph_time = true; + #else static inline void update_function_graph_func(void) { } #endif @@ -917,7 +922,7 @@ static void profile_graph_return(struct ftrace_graph_ret *trace) calltime = trace->rettime - trace->calltime; - if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) { + if (!fgraph_graph_time) { int index; index = trace->depth; @@ -5639,6 +5644,16 @@ static struct ftrace_ops graph_ops = { ASSIGN_OPS_HASH(graph_ops, &global_ops.local_hash) }; +void ftrace_graph_sleep_time_control(bool enable) +{ + fgraph_sleep_time = enable; +} + +void ftrace_graph_graph_time_control(bool enable) +{ + fgraph_graph_time = enable; +} + int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace) { return 0; @@ -5707,7 +5722,7 @@ ftrace_graph_probe_sched_switch(void *ignore, * Does the user want to count the time a function was asleep. * If so, do not update the time stamps. */ - if (trace_flags & TRACE_ITER_SLEEP_TIME) + if (fgraph_sleep_time) return; timestamp = trace_clock_local(); diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d98789b..e26933c 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -492,7 +492,7 @@ static inline void ftrace_trace_stack(struct ring_buffer *buffer, /* trace_flags holds trace_options default values */ unsigned long trace_flags = - FUNCTION_DEFAULT_FLAGS | FUNCTION_GRAPH_DEFAULT_FLAGS | + FUNCTION_DEFAULT_FLAGS | TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK | TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE | diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 33d1e53..5219bf5 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -714,9 +714,14 @@ extern char trace_find_mark(unsigned long long duration); #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 #define TRACE_GRAPH_PRINT_IRQS 0x40 #define TRACE_GRAPH_PRINT_TAIL 0x80 +#define TRACE_GRAPH_SLEEP_TIME 0x100 +#define TRACE_GRAPH_GRAPH_TIME 0x200 #define TRACE_GRAPH_PRINT_FILL_SHIFT 28 #define TRACE_GRAPH_PRINT_FILL_MASK (0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT) +extern void ftrace_graph_sleep_time_control(bool enable); +extern void ftrace_graph_graph_time_control(bool enable); + extern enum print_line_t print_graph_function_flags(struct trace_iterator *iter, u32 flags); extern void print_graph_headers_flags(struct seq_file *s, u32 flags); @@ -892,15 +897,9 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER # define FGRAPH_FLAGS \ - C(SLEEP_TIME, "sleep-time"), \ - C(GRAPH_TIME, "graph-time"), \ C(DISPLAY_GRAPH, "display-graph"), -/* Initially set for trace_flags */ -# define FUNCTION_GRAPH_DEFAULT_FLAGS \ - (TRACE_ITER_SLEEP_TIME | TRACE_ITER_GRAPH_TIME) #else # define FGRAPH_FLAGS -# define FUNCTION_GRAPH_DEFAULT_FLAGS 0UL #endif #ifdef CONFIG_BRANCH_TRACER diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index ca98445..86e45c2 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -83,13 +83,18 @@ static struct tracer_opt trace_opts[] = { { TRACER_OPT(funcgraph-irqs, TRACE_GRAPH_PRINT_IRQS) }, /* Display function name after trailing } */ { TRACER_OPT(funcgraph-tail, TRACE_GRAPH_PRINT_TAIL) }, + /* Include sleep time (scheduled out) between entry and return */ + { TRACER_OPT(sleep-time, TRACE_GRAPH_SLEEP_TIME) }, + /* Include time within nested functions */ + { TRACER_OPT(graph-time, TRACE_GRAPH_GRAPH_TIME) }, { } /* Empty entry */ }; static struct tracer_flags tracer_flags = { /* Don't display overruns, proc, or tail by default */ .val = TRACE_GRAPH_PRINT_CPU | TRACE_GRAPH_PRINT_OVERHEAD | - TRACE_GRAPH_PRINT_DURATION | TRACE_GRAPH_PRINT_IRQS, + TRACE_GRAPH_PRINT_DURATION | TRACE_GRAPH_PRINT_IRQS | + TRACE_GRAPH_SLEEP_TIME | TRACE_GRAPH_GRAPH_TIME, .opts = trace_opts }; @@ -1362,6 +1367,12 @@ func_graph_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set) if (bit == TRACE_GRAPH_PRINT_IRQS) ftrace_graph_skip_irqs = !set; + if (bit == TRACE_GRAPH_SLEEP_TIME) + ftrace_graph_sleep_time_control(set); + + if (bit == TRACE_GRAPH_GRAPH_TIME) + ftrace_graph_graph_time_control(set); + return 0; } |