On 7/12/2018 5:42 AM, Tvrtko Ursulin wrote:

On 12/07/2018 11:59, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursu...@intel.com>

It is possible to customize the axis display so change it to display
timestamps in seconds on the major axis (with six decimal spaces) and
relative millisecond offsets on the minor axis.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Suggested-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: John Harrison <john.c.harri...@intel.com>
---
  scripts/trace.pl | 32 ++++++++++++++++++++++++++++++++
  1 file changed, 32 insertions(+)

diff --git a/scripts/trace.pl b/scripts/trace.pl
index fc1713e4f9a7..89491125490d 100755
--- a/scripts/trace.pl
+++ b/scripts/trace.pl
@@ -1000,6 +1000,37 @@ $first_ts = ts($first_ts);
  print <<ENDHTML;
    ]);
  +  var last_major_ms;
+
+  function majorAxis(date, scale, step) {
+    var s = date / 1000;
+
+    last_major_ms = date;
+
+    if (scale == 'millisecond')
+        return s.toFixed(6) + "s";
+    else if (scale == 'second')
+        return s.toFixed(3) + "s";
+    else
+        return s.toFixed(0) + "s";
+  }
+
+  function minorAxis(date, scale, step) {
+    var ms = date;
+
+    ms -= last_major_ms;

This logic is unfortunately a bit dodgy. It looked like major label is getting called before the minor ones, so I thought I could calculate the relative offset for the minor for a more readable display. But after scrolling and zooming around timelines some more I can see cases where that doesn't seem to be the case.

Please have a play and if you think it is bad they only option will be to absolute time for minor labels as well.

Something is completely broken for me. I am getting massively out of whack timeline values. For example, a log file entry of 761846.983987 is being displayed as -59196268.216013s! Even ignoring that, I'm not convinced about the relative offset thing. It makes it much harder to correlate the graph with the trace file entries, e.g. if trying to work out exactly what happened when something went peculiar in a test. Would it be possible to make it dynamically switchable between raw absolute values and the funky change-as-you-scroll relative ones?

Also, it doesn't seem especially useful to have the values be relative to the left most edge of the visible portion of the timeline. That means that when you scroll sideways along the timeline, the time-stamp of any given point wanders up and down accordingly. That just seems confusing to me! Maybe it makes sense for some use cases but I would have thought that having the values be relative to the start of the trace would be more use. Or even have clickable anchor points so that you can set the origin to be whatever exciting event you are interested in? Although that might be way too complex to be worth the effort of implementing :).



Regards,

Tvrtko

+
+    if (ms < 0)
+        return '';
+
+    if (scale == 'millisecond')
+        return "+" + ms.toFixed(3) + "ms";
+    else if (scale == 'second')
+        return ms.toFixed(3) + "s";
+    else
+        return ms.toFixed(0) + "s";
+  }
+
    // Configuration for the Timeline
    var options = { groupOrder: 'content',
            horizontalScroll: true,
@@ -1007,6 +1038,7 @@ print <<ENDHTML;
            stackSubgroups: false,
            zoomKey: 'ctrlKey',
            orientation: 'top',
+          format: { majorLabels: majorAxis, minorLabels: minorAxis },
            start: '$first_ts',
            end: '$end_ts'};


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