From: Tom Zanussi <tom.zanu...@linux.intel.com> When displaying hist triggers, variable references that have the timestamp field flag set are erroneously displayed as common_timestamp rather than the variable reference. Additionally, timestamp expressions are displayed in the same way. Fix this by forcing the timestamp flag handling to follow variable reference and expression handling.
Before: # cat /sys/kernel/debug/tracing/events/sched/sched_switch/trigger hist:keys=next_pid:vals=hitcount:wakeup_lat=common_timestamp.usecs:... After: # cat /sys/kernel/debug/tracing/events/sched/sched_switch/trigger hist:keys=next_pid:vals=hitcount:wakeup_lat=common_timestamp.usecs-$ts0.usecs:... Link: http://lkml.kernel.org/r/92746b06be67499c2a6217bd55395b350ad18fad.1522256721.git.tom.zanu...@linux.intel.com Signed-off-by: Tom Zanussi <tom.zanu...@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rost...@goodmis.org> --- kernel/trace/trace_events_hist.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index a02bc09d765a..4f4792f4c83f 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1686,8 +1686,6 @@ static const char *hist_field_name(struct hist_field *field, else if (field->flags & HIST_FIELD_FL_LOG2 || field->flags & HIST_FIELD_FL_ALIAS) field_name = hist_field_name(field->operands[0], ++level); - else if (field->flags & HIST_FIELD_FL_TIMESTAMP) - field_name = "common_timestamp"; else if (field->flags & HIST_FIELD_FL_CPU) field_name = "cpu"; else if (field->flags & HIST_FIELD_FL_EXPR || @@ -1703,7 +1701,8 @@ static const char *hist_field_name(struct hist_field *field, field_name = full_name; } else field_name = field->name; - } + } else if (field->flags & HIST_FIELD_FL_TIMESTAMP) + field_name = "common_timestamp"; if (field_name == NULL) field_name = ""; @@ -4858,23 +4857,15 @@ static void hist_field_print(struct seq_file *m, struct hist_field *hist_field) if (hist_field->var.name) seq_printf(m, "%s=", hist_field->var.name); - if (hist_field->flags & HIST_FIELD_FL_TIMESTAMP) - seq_puts(m, "common_timestamp"); - else if (hist_field->flags & HIST_FIELD_FL_CPU) + if (hist_field->flags & HIST_FIELD_FL_CPU) seq_puts(m, "cpu"); else if (field_name) { if (hist_field->flags & HIST_FIELD_FL_VAR_REF || hist_field->flags & HIST_FIELD_FL_ALIAS) seq_putc(m, '$'); seq_printf(m, "%s", field_name); - } - - if (hist_field->flags) { - const char *flags_str = get_hist_field_flags(hist_field); - - if (flags_str) - seq_printf(m, ".%s", flags_str); - } + } else if (hist_field->flags & HIST_FIELD_FL_TIMESTAMP) + seq_puts(m, "common_timestamp"); } static int event_hist_trigger_print(struct seq_file *m, -- 2.15.1
