ср, 13 дек. 2023 г., 19:02 Terje J. Hanssen <[email protected]>:
> > > Den 11.12.2023 14:23, skrev Andrew Randrianasulu: > > > > пн, 11 дек. 2023 г., 16:13 Terje J. Hanssen via Cin < > [email protected]>: > >> >> >> Den 08.12.2023 23:56, skrev Terje J. Hanssen: >> >> >> >> Den 08.12.2023 12:50, skrev Andrew Randrianasulu: >> >> >> >> пт, 8 дек. 2023 г., 13:57 Andrew Randrianasulu <[email protected]>: >> >>> >>> >>> пт, 8 дек. 2023 г., 13:37 Terje J. Hanssen via Cin < >>> [email protected]>: >>> >>>> >>>> >>>> Den 03.12.2023 22:29, skrev Terje J. Hanssen: >>>> >>>> Already touched this topic barely in another thread >>>> https://lists.cinelerra-gg.org/pipermail/cin/2023-December/007346.html >>>> >>>> But so many SW and HW pieces are mentioned around, it is almost a >>>> full-time reading and study: >>>> VAAPI, MESA, VULKAN, Intel Quick Sync Video etc...... >>>> >>>> I realize my aging hardware which is fast enough for other tasks, needs >>>> some "AV1 upgrade", if possible. >>>> >>>> But first I wonder, what is expected possible to do (obtain) with AV1 >>>> de-/encoding on my existing 64bit hardware: >>>> >>>> 1) laptop 2018: Dell XPS 13-9370: quad core i7-8550U CPU (8. gen >>>> Kabylake) and Intel UHD Graphics >>>> >>>> 2) WS infinity: MSI Z170A mobo: quad core i7-6700K CPU (6. gen >>>> Skylake), NVIDIA GeForce GT-730 graphics >>>> >>>> >>>> A budget friendly first "AV1 HW upgrade" of the workstation 2) if >>>> possible, would be to add a new GPU as Intel Arc A380. >>>> But the question is if this will work at all on that much older (2015) >>>> Skylake platform with i7-6700K CPU? >>>> I've seen CPU bottlenecks has been mentioned and that Arc A380 is >>>> targeted at newer generations CPU ... >>>> >>>> >>>> Extracted from the first wikipedia reference below about Intel >>>> Alchemist GPUs: >>>> >>>> - Featuring 8 Xe-cores, the* A380 supports PCI Express 4.0* and has >>>> a total board power (TBP) of 75W. The graphics card is equipped with 6GB >>>> GDDR6 memory and a graphics memory interface of 96 bits, providing a >>>> memory >>>> bandwidth of 186GB/s. >>>> - Bus interface A380: PCIe 4.0 x8 and for >=A580: PCIe 4.0 >>>> x16 >>>> >>>> That is, the keyword here seems to be PCIe 4.0 bus speed as a >>>> requirement to utilize the Arc A380 GPU for HWA AV1 encoding (maybe also >>>> for other GPUs?) >>>> >>> >>> well, despite so much time spend looking at dev process for mesa3d I >>> still do not know full details and media encoder process. But isn't it like >>> putting uncompressed frame in vram (as long as you have enough of it - so >>> probably n raw frames between keyframe ideally?) let media engine chw on >>> it, pull resulting compressed bitstream out of vram via pci-express? >>> >>> So I speculate pcie bandwidth in itself will only matter if you compress >>> both big frame size and long keyframes, so dma engine on card must >>> constantly pump new raw frame data via bus. >>> >>> I saw some mention of big (resizeable) BAR as requirement for good >>> performance, but opengl/vulkan IMO a bit different because they send often >>> big amount of tiny objects (vertices) via bus for each frame. But may be >>> default 256 Mb in size bar feels a bit small for sending like 1 second of >>> 25 4k frames (300 mb/s)? >>> >> >> >> Nothing would be better than that A380 does work with older PCIe 3.0 >> motherboards and CPUs and without too much decrease in performance. >> >> >> Then I got the following reply to my support request from ASRock TSD >> regarding >> >> https://www.asrock.com/Graphics-Card/Intel/Intel%20Arc%20A380%20Challenger%20ITX%206GB%20OC/index.asp >> >> Skylake platform does not match the system minimum requirements. >> Please refer to the below link for further information. >> >> https://www.intel.com/content/www/us/en/support/articles/000091128/graphics.html >> >> well, if you can get card for brief (two weeks?) testing and return if it > really does not work - it will be better than leaning on official answer, > IMO. > > after all, Intel, like any company tries to sell you a bridge ..... > > > Yes, they always want to sell new hardware and do not want to support > older boxes longer than required. > So I may give it try on the new year. The point is to get av1 encoding to > faster with gpu hwaccel, even if it seems to be limited to about 75% speed: > > Today I also got confirmed from MSI technical support: > > BIOS of Z170-A Pro MB doesn’t have Resizable (Re-Size) BAR support, the > mainboard doesn’t support Intel Arc A380 GPU. > For the MB that support Resizable BAR(Re-Size BAR), please find the > Intel/AMD chipse > > https://www.msi.com/news/detail/MSIIsReadyToSupportResizableBARReSizeBARForNVIDIAGeForceRTX30SeriesGPUs121336 > > This is Reddit so take it with mountain of salt, but https://www.reddit.com/r/AV1/comments/17pv7gu/whats_your_intel_arc_hw_av1_encoding_speeds/ ==== quote ==== r/AV1 <https://www.reddit.com/r/AV1/> 1 mo. ago SeaOfTorment <https://www.reddit.com/user/SeaOfTorment/> Whats your Intel Arc HW AV1 Encoding speeds? Hello! I recently got an Asrock Intel Arc A380 Low Profile 6GB card and the first thign I did when i get it, I replaced my gpu with it to test the encoding speed, I installed all the arc drivers (Intel Driver Assistance did everything), restarted and went to handbrake, selected screen recording I recorded with H264 using Geforce Shadowplay, select AV1 QSYNC (or something like that), I selected quality and the encoding speed was about 45-60, I've tested other A380s that require vga power using cable and they've had speeds of like 140-160, what gives? I want to compare mine with other people, currently I don't have rebar enabled and the pcie lane speed is pcie x8 3.0, i've tested a380s with identical systems and got 140-160 just fine, I do have nvidia drivers too in the same system, but I doubt it's that. > ==== quote end. And other users reported up to 250 fps on 1080p transcode. 70 fps is for 4k. I guess this was on Windows machine. So *may be* resizeable PCIE bar is not as hard requirement as it touted to be? it also interesting to see that your machine already can go quite fast with SVT-AV1 in software mode. {snip} > >
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