The part of the code that prints the time of the trace record in "int trace_print_context()" gets extracted in a static function. This is done as a preparation for a following patch, in which we will define a new ftrace event called "func_repeats". The new static method, defined here, will be used by this new event to print the time of the last repeat of a function that is consecutively called number of times.
Signed-off-by: Yordan Karadzhov (VMware) <y.kar...@gmail.com> --- kernel/trace/trace_output.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index a0146e1fffdf..333233d45596 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -587,13 +587,26 @@ lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) return !trace_seq_has_overflowed(s); } +static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter, + unsigned long long ts) +{ + unsigned long secs, usec_rem; + unsigned long long t; + + if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { + t = ns2usecs(ts); + usec_rem = do_div(t, USEC_PER_SEC); + secs = (unsigned long)t; + trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem); + } else + trace_seq_printf(s, " %12llu", ts); +} + int trace_print_context(struct trace_iterator *iter) { struct trace_array *tr = iter->tr; struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent; - unsigned long long t; - unsigned long secs, usec_rem; char comm[TASK_COMM_LEN]; trace_find_cmdline(entry->pid, comm); @@ -614,13 +627,8 @@ int trace_print_context(struct trace_iterator *iter) if (tr->trace_flags & TRACE_ITER_IRQ_INFO) trace_print_lat_fmt(s, entry); - if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { - t = ns2usecs(iter->ts); - usec_rem = do_div(t, USEC_PER_SEC); - secs = (unsigned long)t; - trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); - } else - trace_seq_printf(s, " %12llu: ", iter->ts); + trace_print_time(s, iter, iter->ts); + trace_seq_puts(s, ": "); return !trace_seq_has_overflowed(s); } -- 2.25.1