Running Libreelec on various gemini lake boxes using either N5000 or J5005. Almost since the beginning I have set the max value for gt_min_freq_mhz to avoid sync/stuttering issues. It's almost like the GPU doesn't know it should step up or boost itself while playing back video. Without setting the value playback will fall out of the sync/stutter, however if I bring up an overlay this will stop. This action must cause the GPU to up it's clock speed. Here are the settings I use for gt_min_freq_mhz on LibreElec: In ~/.config/autostart.sh enter the following on an N5000: ( echo 750 > /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_min_freq_mhz ) & nohup script.sh & And on a J5005: ( echo 800 > /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_min_freq_mhz ) & nohup script.sh &
The GPU bases its decision on throughput, it it is saturated it will signal it needs a higher frequency. Video decode is usually efficiently by the GPU and can quite happily run with low clocks. However, users are latency sensitive! For latency, we look at pageflips and if the GPU is still busy when we expected to flip, we boost the clocks. The idea being that with one missed frame, we then put ourselves in a regime where the next sequence of frames do not miss. As always, make sure you have the latest kernel (drm-tip is preferable if you want to help test patches), and you can watch the decision process via /sys/kernel/debug/dri/0/i915_rps_boost_info. To ensure that there is frame info being provided, make sure you are either running the video fullscreen (with flipping enabled) or under a compositor that flips.
Yes, video would be full screen. How do I check if flipping is enabled?
Nothing that I'm aware of, the tracepoints I used to use are gone, so just a matter of looking at dmesg and discerning the flips... If you watch /sys/kernel/debug/dri/0/i915_rps_boost_info, that should mention whether or not is in an "Interactive?" mode that is enabled if we are pageflipping.
(In reply to Ross Nicholson from comment #2) > Yes, video would be full screen. > > How do I check if flipping is enabled? (In reply to Chris Wilson from comment #3) > Nothing that I'm aware of, the tracepoints I used to use are gone, so just a > matter of looking at dmesg and discerning the flips... > > If you watch /sys/kernel/debug/dri/0/i915_rps_boost_info, that should > mention whether or not is in an "Interactive?" mode that is enabled if we > are pageflipping. Ross, Any progress here?
Sorry, was travelling. Will check this tomorrow
Ok, got some time to check this just now. I get laggy video occasionally during normal playback unless I bring up an overlay. I'nm not forcing gt_min_freq_mhz when doing this. First this is during normal playback (no overlay): _____________________________________________________________________ LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [3 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 383, actual 400 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 24 boosts Kernel (anonymous) boosts: 577 RPS Autotuning (current "high power" window): Avg. up: 6% [above threshold? 85%] Avg. down: 64% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 0 Frequency requested 333, actual 350 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 24 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 64% [above threshold? 85%] Avg. down: 59% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 317, actual 350 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 24 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 5% [above threshold? 85%] Avg. down: 70% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 217, actual 250 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 64% [above threshold? 85%] Avg. down: 99% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 233, actual 250 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 8% [above threshold? 85%] Avg. down: 34% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [1 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 333, actual 350 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 99% [above threshold? 85%] Avg. down: 84% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [1 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 317, actual 350 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 99% [above threshold? 85%] Avg. down: 80% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [1 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 200, actual 200 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 15% [above threshold? 85%] Avg. down: 54% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 383, actual 400 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 25% [above threshold? 85%] Avg. down: 37% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [2 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 200, actual 200 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 25 boosts Kernel (anonymous) boosts: 579 RPS Autotuning (current "high power" window): Avg. up: 38% [above threshold? 85%] Avg. down: 60% [below threshold? 60%] _____________________________________________________________________ And if I bring up an overlay: _____________________________________________________________________ LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [1 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 383, actual 400 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 5 boosts Kernel (anonymous) boosts: 543 RPS Autotuning (current "high power" window): Avg. up: 6% [above threshold? 85%] Avg. down: 33% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [4 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 783, actual 550 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 16 boosts Kernel (anonymous) boosts: 546 RPS Autotuning (current "high power" window): Avg. up: 98% [above threshold? 85%] Avg. down: 51% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [4 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 550, actual 550 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 16 boosts Kernel (anonymous) boosts: 550 RPS Autotuning (current "high power" window): Avg. up: 80% [above threshold? 85%] Avg. down: 70% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [4 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 633, actual 450 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 16 boosts Kernel (anonymous) boosts: 551 RPS Autotuning (current "high power" window): Avg. up: 99% [above threshold? 85%] Avg. down: 63% [below threshold? 60%] LibreELECSR:/sys/kernel/debug/dri/0 # cat i915_rps_boost_info RPS enabled? 1 GPU busy? yes [4 requests] Boosts outstanding? 0 Interactive? 1 Frequency requested 783, actual 500 min hard:100, soft:100; max soft:800, hard:800 idle:100, efficient:250, boost:800 Xorg [580]: 0 boosts kodi.bin [606]: 0 boosts VideoPlayer [841]: 16 boosts Kernel (anonymous) boosts: 552 RPS Autotuning (current "high power" window): Avg. up: 94% [above threshold? 85%] Avg. down: 21% [below threshold? 60%]
I mention in my post above that this is occasionally occurring. However it occurs all the time.
(In reply to Ross Nicholson from comment #7) > I mention in my post above that this is occasionally occurring. However it > occurs all the time. Are you experiencing this issue with the latest kernel? If not, can you verify this with the drmtip? (https://cgit.freedesktop.org/drm-tip)
Which kernel version do I require? I can request a build of LibreElec with that version.
(In reply to Ross Nicholson from comment #9) > Which kernel version do I require? > > I can request a build of LibreElec with that version. Drmtip will always have latest changes on top of the 5.3 rc6. So we always recommend to use drmtip kernel (https://cgit.freedesktop.org/drm-tip).
Thanks, will make the request and report back.
Tested with DRMTip on N5000, there is a huge improvement. Thank you! Will also test on J5005 for next 2 days and report back. LibreELECBR:~ # cat /sys/kernel/debug/dri/0/i915_rps_boost_info RPS enabled? 1 GPU busy? yes Boosts outstanding? 0 Interactive? 1 Frequency requested 500, actual 450 min hard:100, soft:100; max soft:750, hard:750 idle:100, efficient:200, boost:750 Wait boosts: 396 RPS Autotuning (current "high power" window): Avg. up: 1% [above threshold? 85%] Avg. down: 14% [below threshold? 60%] LibreELECBR:~ # cat /sys/kernel/debug/dri/0/i915_rps_boost_info RPS enabled? 1 GPU busy? yes Boosts outstanding? 0 Interactive? 1 Frequency requested 667, actual 450 min hard:100, soft:100; max soft:750, hard:750 idle:100, efficient:200, boost:750 Wait boosts: 398 RPS Autotuning (current "high power" window): Avg. up: 6% [above threshold? 85%] Avg. down: 27% [below threshold? 60%] LibreELECBR:~ # cat /sys/kernel/debug/dri/0/i915_rps_boost_info RPS enabled? 1 GPU busy? yes Boosts outstanding? 0 Interactive? 1 Frequency requested 200, actual 200 min hard:100, soft:100; max soft:750, hard:750 idle:100, efficient:200, boost:750 Wait boosts: 398 RPS Autotuning (current "high power" window): Avg. up: 2% [above threshold? 85%] Avg. down: 30% [below threshold? 60%]
Also confirmed on J5005, amazing work, thanks again. Will this make it into the next RC?
Having had more time to observe this I can see that occasionally there is lag. Maybe once every 10/15 mins. Quickly bring up an overlay and removing it will resolve it. So this is greatly improved, but not quite perfect yet.
(In reply to Ross Nicholson from comment #13) > Also confirmed on J5005, amazing work, thanks again. > > Will this make it into the next RC? Not sure which change has brought this improvement. You can always update to the latest RC and try if the issue has gone. If you are happy with drmtip we can close this issue as WORKSFORME.
(In reply to Lakshmi from comment #15) > (In reply to Ross Nicholson from comment #13) > > Also confirmed on J5005, amazing work, thanks again. > > > > Will this make it into the next RC? > > Not sure which change has brought this improvement. You can always update to > the latest RC and try if the issue has gone. If you are happy with drmtip we > can close this issue as WORKSFORME. @Ross, any updates here? Can we close this issue?
Yes. Please close. Sorry I thought I had already replied requesting it. Thanks again!
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