diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.h | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 23 | ||||
| -rw-r--r-- | kernel/trace/trace_output.c | 34 |
3 files changed, 34 insertions, 25 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index c3a37e55ec8b..3255dfb054a0 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -708,6 +708,8 @@ enum print_line_t print_trace_line(struct trace_iterator *iter); extern unsigned long trace_flags; +extern char trace_find_mark(unsigned long long duration); + /* Standard output formatting function used for function return traces */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 100288d10e1f..6c2ab955018c 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -730,8 +730,6 @@ static void print_graph_duration(unsigned long long duration, struct trace_seq *s, u32 flags) { - bool duration_printed = false; - if (!(flags & TRACE_GRAPH_PRINT_DURATION) || !(trace_flags & TRACE_ITER_CONTEXT_INFO)) return; @@ -750,24 +748,9 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s, } /* Signal a overhead of time execution to the output */ - if (flags & TRACE_GRAPH_PRINT_OVERHEAD) { - /* Duration exceeded 100 usecs */ - if (duration > 100000ULL) { - trace_seq_puts(s, "! "); - duration_printed = true; - - /* Duration exceeded 10 usecs */ - } else if (duration > 10000ULL) { - trace_seq_puts(s, "+ "); - duration_printed = true; - } - } - - /* - * If we did not exceed the duration tresholds or we dont want - * to print out the overhead. Either way we need to fill out the space. - */ - if (!duration_printed) + if (flags & TRACE_GRAPH_PRINT_OVERHEAD) + trace_seq_printf(s, "%c ", trace_find_mark(duration)); + else trace_seq_puts(s, " "); trace_print_graph_duration(duration, s); diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index 723818bc83b4..b77b9a697619 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -115,7 +115,7 @@ ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, if (ret == (const char *)(trace_seq_buffer_ptr(p))) trace_seq_printf(p, "0x%lx", val); - + trace_seq_putc(p, 0); return ret; @@ -443,7 +443,32 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) return trace_print_lat_fmt(s, entry); } -static unsigned long preempt_mark_thresh_us = 100; +#undef MARK +#define MARK(v, s) {.val = v, .sym = s} +/* trace overhead mark */ +static const struct trace_mark { + unsigned long long val; /* unit: nsec */ + char sym; +} mark[] = { + MARK(1000000000ULL , '$'), /* 1 sec */ + MARK(1000000ULL , '#'), /* 1000 usecs */ + MARK(100000ULL , '!'), /* 100 usecs */ + MARK(10000ULL , '+'), /* 10 usecs */ +}; +#undef MARK + +char trace_find_mark(unsigned long long d) +{ + int i; + int size = ARRAY_SIZE(mark); + + for (i = 0; i < size; i++) { + if (d >= mark[i].val) + break; + } + + return (i == size) ? ' ' : mark[i].sym; +} static int lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) @@ -480,8 +505,7 @@ lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) trace_seq_printf( s, " %4lldus%c: ", abs_ts, - rel_ts > preempt_mark_thresh_us ? '!' : - rel_ts > 1 ? '+' : ' '); + trace_find_mark(rel_ts * NSEC_PER_USEC)); } else { /* !verbose && !in_ns */ trace_seq_printf(s, " %4lld: ", abs_ts); @@ -663,7 +687,7 @@ int register_ftrace_event(struct trace_event *event) goto out; } else { - + event->type = next_event_type++; list = &ftrace_event_list; } |