[Libva] Can we expect better GPU performance on braswell(Intel celeron N3160) than baytrail(Intel celeron J1900)?

[Peter Frühberger]

Hi Veeranna,

On Thu, Dec 15, 2016 at 6:03 PM, ViruS Tadala <tadala.veerannababu at gmail.com
> wrote:

> Hi Peter,
>
> Thanks for your quick response.
>
> Mentioned figures are GPU load values. I have ran the intel_gpu_top
> command to get the same.
>
> I didn't check any clock details. Used below pipeline and ran multiple
> instances.
>
> gst-launch-1.0 videotestsrc is-live=true pattern=22 horizontal-speed=20 !
> 'video/x-raw, format=(string)I420, width=(int)1920, height=(int)1080,
> framerate=(fraction)10/1' ! vaapiencode_h264 min-qp=20 ! queue !
> vaapidecode ! queue ! appsink
>
> Please let me know if you need more information.
>
> Best Regards,
> Veeranna.
>
>
>
> On Thu, Dec 15, 2016 at 11:47 AM, Peter Frühberger <fritsch at kodi.tv>
> wrote:
>
>> Hi Veeranna,
>>
>> i cannot even interpret your figures. Is that the CPU load? If yes - did
>> you check the clocks?
>> Which benchmark did you use? Where did the data come from, where was it
>> encoded to? Was it stored? Which format?
>>
>> In short: Without more details you most likely get the following answer:
>>
>> Depends!
>>
>> Best regards
>> Peter
>>
>> On Thu, Dec 15, 2016 at 4:19 PM, ViruS Tadala <
>> tadala.veerannababu at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I have done some benchmarking on both platforms & observed that braswell
>>> did lesser number of channels(decode + re-encode using vaapi) than baytrail.
>>>
>>> 60-65% for 6channels on braswell.
>>>
>>> 60-66 % for 10channels on baytrail.
>>>
>>> Please let me know whether we can expect better GPU performance on
>>> braswell than baytrail or not?
>>>
>>> Best Regards,
>>>
>>> Veeranna.
>>>
>>> _______________________________________________
>>> Libva mailing list
>>> Libva at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/libva
>>>
>>>
>>
>
>
> --
> Best Regards,
> ViruS
>

Does this kernel patch help:


>From 32c513eeafa681f798b04488524994fe47355cad Mon Sep 17 00:00:00 2001
From: fritsch <peter.fruehberger at gmail.com>
Date: Sat, 13 Aug 2016 22:56:37 +0200
Subject: [PATCH] drm/i915: intel-pm enable thresholds

---
 drivers/gpu/drm/i915/intel_pm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 06e5596..38e613c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4982,8 +4982,7 @@ static void valleyview_set_rps(struct
drm_i915_private *dev_priv, u8 val)

 	if (val != dev_priv->rps.cur_freq) {
 		vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
-		if (!IS_CHERRYVIEW(dev_priv))
-			gen6_set_rps_thresholds(dev_priv, val);
+		gen6_set_rps_thresholds(dev_priv, val);
 	}

 	dev_priv->rps.cur_freq = val;
-- 
2.7.4



Best regards

Peter
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