[Intel-gfx] [PATCH] drm/i915: Consistent ordering of tracepoint binary data

[Tvrtko Ursulin]

On 11/05/2017 14:07, Chris Wilson wrote:
> On Thu, May 11, 2017 at 02:00:45PM +0100, Tvrtko Ursulin wrote:
>> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>>
>> For userspace receiving binary data it is easier if all related
>> request tracepoints emit the binary data in the same order of
>> dev, ring, ctx, seqno, ...
>
> We decided that dev, ctx, ring, seqno was the right heirachy last time.
> After much debate :)
> ctx is the logical view of the device for a user
> ctx + ring = timeline

I couldn't remember so I thought it must have been what is documented in 
TP_printk. Now I am confused. On one hand it's true, but on the other 
ctx/seqno is also a pair as opposed to engine being stuck in the middle. 
So ring-ctx-seqno is easier for humans I think. Even since per 
ctx/engine seqno space.

Oh and I said I'll rename all those ring= to engine=..

Regards,

Tvrtko