From: Daniel Vetter <daniel@ffwll.ch>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Add a tracepoint for using a semaphore
Date: Wed, 25 Sep 2013 13:31:13 +0200 [thread overview]
Message-ID: <20130925113113.GM12663@phenom.ffwll.local> (raw)
In-Reply-To: <20130925112934.GM4531@intel.com>
On Wed, Sep 25, 2013 at 02:29:34PM +0300, Ville Syrjälä wrote:
> On Wed, Sep 25, 2013 at 11:43:28AM +0100, Chris Wilson wrote:
> > So that we can find the callers who introduce a ring stall. A single
> > ring stall is not too unwelcome, the right issue becomes when they start
> > to interlock and prevent any concurrent work. That, however, is a little
> > tricker to detect with a mere tracepoint!
> >
> > v2: Rebrand it as a ring event, rather than an object event.
> > v3: Include the seqno in the tracepoint for posterity or something.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > ---
> > drivers/gpu/drm/i915/i915_gem.c | 1 +
> > drivers/gpu/drm/i915/i915_trace.h | 26 ++++++++++++++++++++++++++
> > 2 files changed, 27 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> > index 82bc029..fa3b373 100644
> > --- a/drivers/gpu/drm/i915/i915_gem.c
> > +++ b/drivers/gpu/drm/i915/i915_gem.c
> > @@ -2625,6 +2625,7 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj,
> > if (ret)
> > return ret;
> >
> > + trace_i915_gem_ring_sync_to(from, to, seqno);
> > ret = to->sync_to(to, from, seqno);
>
> Passing the rings in the same order to both might avoid some confusion,
> but I don't care enough to withhold my r-b so:
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Queued for -next, thanks for the patch.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
next prev parent reply other threads:[~2013-09-25 11:30 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-23 20:33 [PATCH 00/13] drm-intel-collector - review request Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 01/13] drm/i915: check that the i965g/gm 4G limit is really obeyed Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 02/13] drm/i915: Move the conditional seqno query into the tracepoint Rodrigo Vivi
2013-09-24 18:50 ` Ville Syrjälä
2013-09-24 19:20 ` Daniel Vetter
2013-09-23 20:33 ` [PATCH 03/13] drm/i915: Add some missing steps to i915_driver_load error path Rodrigo Vivi
2013-10-02 17:00 ` Daniel Vetter
2013-09-23 20:33 ` [PATCH 04/13] drm/i915: Asynchronously perform the set-base for a simple modeset Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 05/13] drm/i915: Align tiled scanouts from stolen memory to 256k in the GTT Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 06/13] drm/i915: Pair seqno completion tracepoint with its dispatch Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 07/13] drm/i915: Initialise min/max frequencies before updating RPS registers Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 08/13] drm/i915: Delay the relase of the forcewake by a jiffie Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 09/13] drm/i915: Add a tracepoint for using a semaphore Rodrigo Vivi
2013-09-25 9:34 ` Ville Syrjälä
2013-09-25 10:11 ` Daniel Vetter
2013-09-25 10:43 ` [PATCH] " Chris Wilson
2013-09-25 11:29 ` Ville Syrjälä
2013-09-25 11:31 ` Daniel Vetter [this message]
2013-09-23 20:33 ` [PATCH 10/13] drm/i915: Boost RPS frequency for CPU stalls Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 11/13] drm/i915: Tweak RPS thresholds to more aggressively downclock Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 12/13] drm/i915: Allow GT3 Slice Shutdown on Boot Rodrigo Vivi
2013-09-23 20:33 ` [PATCH 13/13] drm/i915: Allow Dynamically GT3 Slice Shutdown Rodrigo Vivi
2013-09-23 21:13 ` Chris Wilson
2013-09-24 10:15 ` [PATCH 00/13] drm-intel-collector - review request Daniel Vetter
2013-09-24 10:32 ` Chris Wilson
2013-09-24 10:47 ` Daniel Vetter
2013-09-24 11:11 ` Chris Wilson
2013-09-24 11:22 ` Daniel Vetter
-- strict thread matches above, loose matches on Subject: below --
2013-08-26 13:34 [PATCH] drm/i915: Add a tracepoint for using a semaphore Chris Wilson
2013-08-26 12:46 Chris Wilson
2013-08-26 13:20 ` Ville Syrjälä
2013-08-26 13:30 ` Chris Wilson
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