[igt-dev] [PATCH i-g-t v2 1/9] trace.pl: Improve time axis labels

[John Harrison]

On 7/13/2018 2:55 AM, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at 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
> millisecond offsets on the minor axis.
>
> v2:
>   * Give up on broken relative timestamps.
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: John Harrison <John.C.Harrison at Intel.com>
> ---
>   scripts/trace.pl | 37 +++++++++++++++++++++++++++++++++++++
>   1 file changed, 37 insertions(+)
>
> diff --git a/scripts/trace.pl b/scripts/trace.pl
> index fc1713e4f9a7..41f10749a153 100755
> --- a/scripts/trace.pl
> +++ b/scripts/trace.pl
> @@ -1000,6 +1000,42 @@ $first_ts = ts($first_ts);
>   print <<ENDHTML;
>     ]);
>   
> +  function majorAxis(date, scale, step) {
> +	var s = date / 1000;
> +	var precision;
> +
> +	if (scale == 'millisecond')
> +		precision = 6;
> +	else if (scale == 'second')
> +		precision = 3;
> +	else
> +		precision = 0;
> +
> +	return s.toFixed(precision) + "s";
> +  }
> +
> +  function minorAxis(date, scale, step) {
> +	var ms = date;
> +	var precision;
> +	var unit;
> +
> +	if (scale == 'millisecond') {
> +		ms %= 1000;
> +		precision = 0;
> +		unit = 'ms';
> +	} else if (scale == 'second') {
> +		ms /= 1000;
> +		precision = 1;
> +		unit = 's';
> +	} else {
> +		ms /= 1000;
> +		precision = 0;
> +		unit = 's';
> +	}
> +
> +	return ms.toFixed(precision) + unit;
> +  }
> +
>     // Configuration for the Timeline
>     var options = { groupOrder: 'content',
>   		  horizontalScroll: true,
> @@ -1007,6 +1043,7 @@ print <<ENDHTML;
>   		  stackSubgroups: false,
>   		  zoomKey: 'ctrlKey',
>   		  orientation: 'top',
> +		  format: { majorLabels: majorAxis, minorLabels: minorAxis },
>   		  start: '$first_ts',
>   		  end: '$end_ts'};
>   

I'm still seeing some kind of strange offset. However, it appears to be 
browser dependent. If I use Chrome then the offset is +28.8 seconds. 
With Firefox it is -59958115.2 seconds! On the other hand, if I try Edge 
or IE then I don't get a graph at all. I'm wondering if the issue is 
with Vis browser compatibility rather than anything in the trace.pl 
script. Are you seeing anything at all similar?

Hmm, if I comment out the 'format:' line and go back to the unformatted 
time stamps then IE & Edge still show nothing. However, Firefox shows 
dates based on a year of 0097 whereas Chrome says 1997.

Either way, I can't spot anything in this patch that could cause a 
random offset. So...

Reviewed-by: John Harrison<John.C.Harrison at Intel.com>



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