Hey all,
I also had a talk with Alex yesterday about post-processing issues
when using dynamic UVD profiles and a chamge on CS ioctl
including a flag to let user mode driver tell to the kernel which
performance requirement it wants for post processing. A commom
point for both discussion is to stablish the default values for these
profiles, but probably this ioctl change would be more impacting/complex
to implement than a sysfs entry.
If a sysfs entry is anough for now I can handle the code to create it
and, with your help, the code to setup the UVD profile requested
through it.
Is there any suggestion?
Thanks all for your help,
On Fri, Aug 15, 2014 at 5:48 AM, Christian König
<christian.koenig@xxxxxxx <mailto:christian.koenig@xxxxxxx>> wrote:
Hi guys,
to make a long story short every time I watch a movie my laptop
start to heat up because we always select the standard UVD power
profile without actually measuring if that is necessary.
Marco came up with a patch that seems to reliable measure the fps
send down to the kernel and so together with knowing the frame
size of the video should allow us to select the right UVD power
profile.
The problem is that Alex (unnoticed by me) completely disabled
selecting the UVD profiles because of some issues with advanced
post processing discussed on IRC. The problem seems to be that the
lower UVD profiles have a to low SCLK/MCLK to handle the 3D load
that comes with scaling, deinterlacing etc...
I unfortunately don't have time for it, cause this only affects
the hardware generations R600-SI and not the newest one CIK. So
could you guys stick together and come up with a solution?
Something like a sysfs entry that let's us select the minimum UVD
power level allowed?
I think Marco is happy to come up with a patch, we just need to
know what's really needed and what should be the default values.
I'm happy to review everything that comes out of it, just don't
have time to do it myself.
Happy discussion and thanks in advance,
Christian.
Am 12.08.2014 um 15:05 schrieb Alex Deucher:
On Tue, Aug 12, 2014 at 6:00 AM, Christian König
<deathsimple@xxxxxxxxxxx <mailto:deathsimple@xxxxxxxxxxx>> wrote:
Am 11.08.2014 um 16:52 schrieb Alex Deucher:
On Mon, Aug 11, 2014 at 5:08 AM, Christian König
<deathsimple@xxxxxxxxxxx
<mailto:deathsimple@xxxxxxxxxxx>> wrote:
Am 07.08.2014 um 21:43 schrieb Alex Deucher:
On Thu, Aug 7, 2014 at 11:32 AM, Christian König
<deathsimple@xxxxxxxxxxx
<mailto:deathsimple@xxxxxxxxxxx>> wrote:
Am 07.08.2014 um 16:32 schrieb Alex Deucher:
On Thu, Aug 7, 2014 at 7:33 AM,
Christian König
<deathsimple@xxxxxxxxxxx
<mailto:deathsimple@xxxxxxxxxxx>>
wrote:
From: Marco A Benatto
<marco.antonio.780@xxxxxxxxx
<mailto:marco.antonio.780@xxxxxxxxx>>
Adding a Frames Per Second
estimation logic on UVD handles
when it has being used. This
estimation is per handle basis
and will help on DPM profile
calculation.
v2 (chk): fix timestamp type, move
functions around and
cleanup code a bit.
Will this really help much? I thought
the problem was mainly due to
sclk and mclk for post processing.
It should at least handle the UVD side for
upclocking when you get a
lot
of
streams / fps. And at on my NI the patch
seems to do exactly that.
Switching sclk and mclk for post
processing is a different task, and I
actually have no idea what to do with them.
At this point we always choose the plain UVD
state anyway so this
patch would only take effect if we re-enabled
the dynamic UVD state
selection.
Hui? I thought we already re-enabled the dynamic
UVD state selection, but
double checking this I found it disabled again.
What was the problem with that? Looks like I
somehow missed the
discussion
around it.
We did, but after doing so a number of people
complained about a
regression on IRC because when apps like xmbc enabled
post processing,
performance went down.
That's strange, from my experience the different UVD
performance states only
affect UVDs dclk/vclk, not sclk/mclk. I need to get the
DPM dumps to
confirms this.
The sclks and mclks are usually different as well, especially
on APUs.
I can send you some examples.
You not off hand remember who complained on IRC? Finding
something in the
IRC logs is like searching for a needle in a haystack.
I don't remember off hand. I think zgreg was involved in some
of the
discussions.
Alex
Thanks,
Christian.
Alex
Christian.
For the post processing, we probably need a
hint we can
pass to the driver in the CS ioctl to denote
what state we need.
Although if we did that, this could would
largely be moot. That said,
newer asics support dynamic UVD clocks so we
really only need
something like that for older asics and I
guess VCE.
Alex
Christian.
Alex
Signed-off-by: Marco A Benatto
<marco.antonio.780@xxxxxxxxx
<mailto:marco.antonio.780@xxxxxxxxx>>
Signed-off-by: Christian König
<christian.koenig@xxxxxxx
<mailto:christian.koenig@xxxxxxx>>
---
drivers/gpu/drm/radeon/radeon.h
| 10 ++++++
drivers/gpu/drm/radeon/radeon_uvd.c
| 64
+++++++++++++++++++++++++++++++++----
2 files changed, 68
insertions(+), 6 deletions(-)
diff --git
a/drivers/gpu/drm/radeon/radeon.h
b/drivers/gpu/drm/radeon/radeon.h
index 9e1732e..e92f6cb 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1617,6 +1617,15 @@ int
radeon_pm_get_type_index(struct
radeon_device
*rdev,
#define
RADEON_UVD_STACK_SIZE (1024*1024)
#define RADEON_UVD_HEAP_SIZE
(1024*1024)
+#define RADEON_UVD_FPS_EVENTS_MAX 8
+#define RADEON_UVD_DEFAULT_FPS 60
+
+struct radeon_uvd_fps {
+ uint64_t timestamp;
+ uint8_t event_index;
+ uint8_t
events[RADEON_UVD_FPS_EVENTS_MAX];
+};
+
struct radeon_uvd {
struct radeon_bo
*vcpu_bo;
void
*cpu_addr;
@@ -1626,6 +1635,7 @@ struct
radeon_uvd {
struct drm_file
*filp[RADEON_MAX_UVD_HANDLES];
unsigned
img_size[RADEON_MAX_UVD_HANDLES];
struct delayed_work
idle_work;
+ struct radeon_uvd_fps
fps_info[RADEON_MAX_UVD_HANDLES];
};
int radeon_uvd_init(struct
radeon_device *rdev);
diff --git
a/drivers/gpu/drm/radeon/radeon_uvd.c
b/drivers/gpu/drm/radeon/radeon_uvd.c
index 6bf55ec..ef5667a 100644
---
a/drivers/gpu/drm/radeon/radeon_uvd.c
+++
b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -237,6 +237,51 @@ void
radeon_uvd_force_into_uvd_segment(struct
radeon_bo *rbo)
rbo->placement.lpfn =
(256 * 1024 * 1024) >> PAGE_SHIFT;
}
+static void
radeon_uvd_fps_clear_events(struct
radeon_device *rdev,
int
idx)
+{
+ struct radeon_uvd_fps *fps
= &rdev->uvd.fps_info[idx];
+ unsigned i;
+
+ fps->timestamp = jiffies_64;
+ fps->event_index = 0;
+ for (i = 0; i <
RADEON_UVD_FPS_EVENTS_MAX; i++)
+ fps->events[i] = 0;
+}
+
+static void
radeon_uvd_fps_note_event(struct
radeon_device *rdev,
int
idx)
+{
+ struct radeon_uvd_fps *fps
= &rdev->uvd.fps_info[idx];
+ uint64_t timestamp =
jiffies_64;
+ unsigned rate = 0;
+
+ uint8_t index =
fps->event_index++;
+ fps->event_index %=
RADEON_UVD_FPS_EVENTS_MAX;
+
+ rate = div64_u64(HZ,
max(timestamp - fps->timestamp,
1ULL));
+
+ fps->timestamp = timestamp;
+ fps->events[index] =
min(rate, 120u);
+}
+
+static unsigned
radeon_uvd_estimate_fps(struct
radeon_device *rdev,
int
idx)
+{
+ struct radeon_uvd_fps *fps
= &rdev->uvd.fps_info[idx];
+ unsigned i, valid = 0,
count = 0;
+
+ for (i = 0; i <
RADEON_UVD_FPS_EVENTS_MAX; i++) {
+ /* We should
ignore zero values */
+ if (fps->events[i]
!= 0) {
+ count +=
fps->events[i];
+ valid++;
+ }
+ }
+
+ if (valid > 0)
+ return count / valid;
+ else
+ return
RADEON_UVD_DEFAULT_FPS;
+}
+
void
radeon_uvd_free_handles(struct
radeon_device *rdev, struct
drm_file *filp)
{
int i, r;
@@ -419,8 +464,10 @@ static int
radeon_uvd_cs_msg(struct
radeon_cs_parser
*p, struct radeon_bo *bo,
/* create or decode,
validate the handle */
for (i = 0; i <
RADEON_MAX_UVD_HANDLES; ++i) {
- if
(atomic_read(&p->rdev->uvd.handles[i])
== handle)
+ if
(atomic_read(&p->rdev->uvd.handles[i])
== handle)
{
+
radeon_uvd_fps_note_event(p->rdev, i);
return 0;
+ }
}
/* handle not found
try to alloc a new one */
@@ -428,6 +475,7 @@ static int
radeon_uvd_cs_msg(struct
radeon_cs_parser
*p, struct radeon_bo *bo,
if
(!atomic_cmpxchg(&p->rdev->uvd.handles[i],
0,
handle)) {
p->rdev->uvd.filp[i] = p->filp;
p->rdev->uvd.img_size[i] = img_size;
+
radeon_uvd_fps_clear_events(p->rdev,
i);
return 0;
}
}
@@ -763,7 +811,7 @@ int
radeon_uvd_get_destroy_msg(struct
radeon_device
*rdev, int ring,
static void
radeon_uvd_count_handles(struct
radeon_device *rdev,
unsigned *sd, unsigned *hd)
{
- unsigned i;
+ unsigned i, fps_rate = 0;
*sd = 0;
*hd = 0;
@@ -772,10 +820,13 @@ static void
radeon_uvd_count_handles(struct
radeon_device *rdev,
if
(!atomic_read(&rdev->uvd.handles[i]))
continue;
- if
(rdev->uvd.img_size[i] >= 720*576)
- ++(*hd);
- else
- ++(*sd);
+ fps_rate =
radeon_uvd_estimate_fps(rdev, i);
+
+ if
(rdev->uvd.img_size[i] >= 720*576) {
+ (*hd) +=
fps_rate > 30 ? 1 : 2;
+ } else {
+ (*sd) +=
fps_rate > 30 ? 1 : 2;
+ }
}
}
@@ -805,6 +856,7 @@ void
radeon_uvd_note_usage(struct
radeon_device
*rdev)
set_clocks &=
schedule_delayed_work(&rdev->uvd.idle_work,
msecs_to_jiffies(UVD_IDLE_TIMEOUT_MS));
+
if
((rdev->pm.pm_method ==
PM_METHOD_DPM) &&
rdev->pm.dpm_enabled) {
unsigned hd =
0, sd = 0;
radeon_uvd_count_handles(rdev,
&sd, &hd);
--
1.9.1
--
Marco Antonio Benatto
Linux user ID:#506236
