Re: [PATCH] Add gpu memory tracepoints

[Steven Rostedt]

On Mon, 10 Feb 2020 19:05:35 -0800
Yiwei Zhang <zzyiwei@xxxxxxxxxx> wrote:

> Thanks for the prompt reply!
> 
> The tracepoint proposed here is for tracking global gpu memory usage
> total counter and per-process gpu memory usage total counter. The
> tracepoint is for gfx drivers who have implemented gpu memory tracking
> system. The tracepoint expects the de-duplication of the shared memory
> is done inside the tracking system.
> 
> On Android, the graphics driver has implemented gpu memory tracking.
> First, we'd like to profiler GPU memory with this tracepoint. Second,
> we implement eBPF programs and attach to this tracepoint for tracking
> GPU memory at runtime on production devices. However, the tracepoint +
> eBPF approach requires the tracepoint to be upstreamed so that it's
> considered a stable interface which Android common kernel can carry it
> forever.


Then it needs to live in the drivers/gpu directory. kernel/trace is for
tracing infrastructure and not for adding trace points.

-- Steve