чт, 24 апр. 2025 г., 19:54 Andrew Randrianasulu <randrianasulu@gmail.com>:

чт, 24 апр. 2025 г., 18:39 Andrew Randrianasulu <randrianasulu@gmail.com>:

note, openCL is different to openGL, mostly being more about more accurate computations.

On AMD FX4300, 32bit userspace but llvm probably uses avx?

guest@slax:/dev/shm/mesa/BUILD$ RUSTICL_ENABLE=llvmpipe  clpeak

Platform: rusticl

  Device: llvmpipe (LLVM 20.1.3, 256 bits)

    Driver version  : 25.2.0-devel (git-845611bb43) (Linux x86)

    Compute units   : 8

    Clock frequency : 300 MHz

    Global memory bandwidth (GBPS)

      float   : 3.72

      float2  : 4.08

      float4  : 3.59

      float8  : 2.81

      float16 : 2.09

    Single-precision compute (GFLOPS)

      float   : 14.67

      float2  : 17.86

      float4  : 15.99

      float8  : 14.72

      float16 : 14.63

    No half precision support! Skipped

    No double precision support! Skipped

    Integer compute (GIOPS)

      int   : 13.89

      int2  : 13.25

      int4  : 12.85                                                                                      int8  : 13.04

      int16 : 11.51

    Integer compute Fast 24bit (GIOPS)                                                                   int   : 13.65

      int2  : 13.29

      int4  : 13.23                                                                                      int8  : 12.90

      int16 : 11.08

    Transfer bandwidth (GBPS)

      enqueueWriteBuffer              : 2.82                                                             enqueueReadBuffer               : 1.08

      enqueueWriteBuffer non-blocking : 2.89

      enqueueReadBuffer non-blocking  : 1.02

      enqueueMapBuffer(for read)      : 1.15

        memcpy from mapped ptr        : 3.02

      enqueueUnmap(after write)       : 2.22

        memcpy to mapped ptr          : 3.01

    Kernel launch latency : 21.55 us

guest@slax:/dev/shm/mesa/BUILD$

command to build somewhat minimal mesa (llvmpipe + amd):

meson ../ --prefix=/usr/X11R7 --libdir=lib --strip --buildtype debugoptimized -Degl=enabled -Dosmesa=true -Dplatforms=x11 -Dgallium-drivers=r600,radeonsi,llvmpipe -Dvulkan-drivers=amd,swrast  -Dgallium-nine=true -Dgallium-va=enabled  -Dgallium-xa=disabled -Dgallium-rusticl=true -Dllvm=enabled -Drust_std=2021  -Dvideo-codecs="all"

of course you can set your own prefix ( I have X installed into non-default location).

Biggest obstacle for me was that mesa git require some new llvm, and just released two days ago SPIRV-Tools-2024.4 !

And github "release" is of course broken, in sense you need to manually fetch headers at specific commit.

Of course "real gpu" will get like >200 GFLOPS , even my puny GF710 was that fast, but possibility of lock up makes this option less attractive ;)

but of course real ffmpeg command fail mysteriously:

RUSTICL_ENABLE=llvmpipe ffmpeg  -init_hw_device opencl=ocl -filter_hw_device ocl  -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -s 512:384 -r 10 -vf "format=p010,hwupload,tonemap_opencl=tonemap=mobius:param=0.01:desat=0:r=tv:p=bt709:t=bt709:m=bt709:format=nv12,hwdownload,format=nv12" -c:a copy -c:s copy -c:v libx264 -f mp4 /dev/null -debug verbose

ffmpeg: ../src/compiler/nir/nir_metadata.c:172: nir_metadata_check_validation_flag: Assertion `!(impl->valid_metadata & nir_metadata_not_properly_reset)' failed.

Aborted

real hw opencl from RX550 and ffmpeg 7.1.1 works, just with ~5 fps ;)

./ffmpeg  -hwaccel vaapi -init_hw_device opencl=ocl -filter_hw_device ocl  -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov  -vf "format=p010,hwupload,tonemap_opencl=tonemap=mobius:param=0.01:desat=0:r=tv:p=bt709:t=bt709:m=bt709:format=p010,hwdownload,format=p010" -c:a copy -c:s copy -c:v rawvideo -f avi /dev/null -loglevel verbose

[out#0/avi @ 0xbe7b000] Starting thread...

frame=    1 fps=0.7 q=-0.0 size=      10KiB time=00:00:00.01 bitrate=4750.2kbits/s speed=0.0111x   

frame=    3 fps=1.5 q=-0.0 size=   32256KiB time=00:00:00.05 bitrate=5279543.5kbits/s speed=0.025x 

frame=    5 fps=2.0 q=-0.0 size=   80896KiB time=00:00:00.08 bitrate=7944424.2kbits/s speed=0.0334x

frame=    8 fps=2.7 q=-0.0 size=  113408KiB time=00:00:00.13 bitrate=6960809.3kbits/s speed=0.0445x

frame=   10 fps=2.9 q=-0.0 size=  161792KiB time=00:00:00.18 bitrate=7222219.5kbits/s speed=0.0524x

frame=   13 fps=3.2 q=-0.0 size=  194304KiB time=00:00:00.23 bitrate=6814911.2kbits/s speed=0.0584x

frame=   15 fps=3.3 q=-0.0 size=  242944KiB time=00:00:00.26 bitrate=7455793.2kbits/s speed=0.0593x

frame=   18 fps=3.6 q=-0.0 size=  275456KiB time=00:00:00.31 bitrate=7118790.4kbits/s speed=0.0634x

frame=   20 fps=3.6 q=-0.0 size=  323840KiB time=00:00:00.35 bitrate=7572134.4kbits/s speed=0.0637x 

frame=   23 fps=3.8 q=-0.0 size=  372480KiB time=00:00:00.40 bitrate=7620769.6kbits/s speed=0.0667x

frame=   26 fps=4.0 q=-0.0 size=  404992KiB time=00:00:00.45 bitrate=7365289.1kbits/s speed=0.0693x

frame=   28 fps=4.0 q=-0.0 size=  453632KiB time=00:00:00.48 bitrate=7680906.9kbits/s speed=0.0691x

frame=   31 fps=4.1 q=-0.0 size=  485888KiB time=00:00:00.53 bitrate=7455779.2kbits/s speed=0.0711x

frame=   33 fps=4.1 q=-0.0 size=  534528KiB time=00:00:00.56 bitrate=7719673.2kbits/s speed=0.0709x

frame=   36 fps=4.2 q=-0.0 size=  567040KiB time=00:00:00.61 bitrate=7525222.1kbits/s speed=0.0726x

frame=   38 fps=4.2 q=-0.0 size=  615680KiB time=00:00:00.65 bitrate=7751710.7kbits/s speed=0.0723x

frame=   41 fps=4.3 q=-0.0 size=  664320KiB time=00:00:00.70 bitrate=7766675.4kbits/s speed=0.0737x

frame=   43 fps=4.3 q=-0.0 size=  680448KiB time=00:00:00.73 bitrate=7593625.7kbits/s speed=0.0734x

frame=   46 fps=4.4 q=-0.0 size=  745216KiB time=00:00:00.78 bitrate=7785584.9kbits/s speed=0.0746x

frame=   49 fps=4.5 q=-0.0 size=  777728KiB time=00:00:00.83 bitrate=7637736.5kbits/s speed=0.0758x

frame=   51 fps=4.4 q=-0.0 size=  826368KiB time=00:00:00.86 bitrate=7803284.3kbits/s speed=0.0754x

frame=   54 fps=4.5 q=-0.0 size=  858624KiB time=00:00:00.91 bitrate=7665625.7kbits/s speed=0.0764xframe=   56 fps=4.5 q=-0.0 size=  891136KiB time=00:00:00.95 bitrate=7676729.7kbits/s speed=0.076x frame=   59 fps=4.5 q=-0.0 size=  955904KiB time=00:00:01.00 bitrate=7822942.6kbits/s speed=0.077x frame=   61 fps=4.5 q=-0.0 size=  972032KiB time=00:00:01.03 bitrate=7698318.0kbits/s speed=0.0766xframe=   64 fps=4.6 q=-0.0 size= 1036800KiB time=00:00:01.08 bitrate=7832287.4kbits/s speed=0.0774xframe=   67 fps=4.6 q=-0.0 size= 1069345KiB time=00:00:01.13 bitrate=7721752.5kbits/s speed=0.0782xframe=   69 fps=4.6 q=-0.0 size= 1117985KiB time=00:00:01.16 bitrate=7842330.5kbits/s speed=0.0778xframe=   72 fps=4.6 q=-0.0 size= 1150241KiB time=00:00:01.21 bitrate=7737010.4kbits/s speed=0.0785xframe=   74 fps=4.6 q=-0.0 size= 1198881KiB time=00:00:01.25 bitrate=7849136.7kbits/s speed=0.0782xframe=   77 fps=4.7 q=-0.0 size= 1231393KiB time=00:00:01.30 bitrate=7751917.8kbits/s speed=0.0788xframe=   79 fps=4.6 q=-0.0 size= 1263649KiB time=00:00:01.33 bitrate=7756100.8kbits/s speed=0.0785xframe=   82 fps=4.7 q=-0.0 size= 1328673KiB time=00:00:01.38 bitrate=7860442.5kbits/s speed=0.0791xframe=   85 fps=4.7 q=-0.0 size= 1360929KiB time=00:00:01.43 bitrate=7770411.2kbits/s speed=0.0797xframe=   87 fps=4.7 q=-0.0 size= 1409569KiB time=00:00:01.46 bitrate=7865219.6kbits/s speed=0.0793xframe=   90 fps=4.7 q=-0.0 size= 1442081KiB time=00:00:01.51 bitrate=7781358.9kbits/s speed=0.0799xframe=   92 fps=4.7 q=-0.0 size= 1490465KiB time=00:00:01.55 bitrate=7869477.9kbits/s speed=0.0795xframe=   95 fps=4.7 q=-0.0 size= 1522977KiB time=00:00:01.60 bitrate=7789851.9kbits/s speed=0.08x  frame=   97 fps=4.7 q=-0.0 size= 1555489KiB time=00:00:01.63 bitrate=7793775.1kbits/s speed=0.0797xframe=  100 fps=4.8 q=-0.0 size= 1620257KiB time=00:00:01.68 bitrate=7877157.6kbits/s speed=0.0802xframe=  103 fps=4.8 q=-0.0 size= 1652513KiB time=00:00:01.73 bitrate=7802226.5kbits/s speed=0.0807xframe=  105 fps=4.8 q=-0.0 size= 1701153KiB time=00:00:01.76 bitrate=7880335.1kbits/s speed=0.0803xframe=  108 fps=4.8 q=-0.0 size= 1733665KiB time=00:00:01.81 bitrate=7809906.9kbits/s speed=0.0808xframe=  110 fps=4.8 q=-0.0 size= 1782305KiB time=00:00:01.85 bitrate=7884354.4kbits/s speed=0.0805xframe=  113 fps=4.8 q=-0.0 size= 1830945KiB time=00:00:01.90 bitrate=7886377.1kbits/s speed=0.0809xframe=  115 fps=4.8 q=-0.0 size= 1863201KiB time=00:00:01.93 bitrate=7886943.6kbits/s speed=0.0806xframe=  118 fps=4.8 q=-0.0 size= 1911841KiB time=00:00:01.98 bitrate=7888816.1kbits/s speed=0.081x frame=  120 fps=4.8 q=-0.0 size= 1927969KiB time=00:00:02.01 bitrate=7823873.9kbits/s speed=0.0807xframe=  123 fps=4.8 q=-0.0 size= 1992993KiB time=00:00:02.06 bitrate=7892075.9kbits/s speed=0.0811xframe=  126 fps=4.8 q=-0.0 size= 2025249KiB time=00:00:02.11 bitrate=7830362.5kbits/s speed=0.0814xframe=  128 fps=4.8 q=-0.0 size= 2073889KiB time=00:00:02.15 bitrate=7894104.9kbits/s speed=0.0812xframe=  131 fps=4.8 q=-0.0 size= 2106401KiB time=00:00:02.20 bitrate=7835635.4kbits/s speed=0.0815xframe=  133 fps=4.8 q=-0.0 size= 2154809KiB time=00:00:02.23 bitrate=7896071.0kbits/s speed=0.0813xframe=  136 fps=4.9 q=-0.0 size= 2187321KiB time=00:00:02.28 bitrate=7839692.4kbits/s speed=0.0816xframe=  138 fps=4.8 q=-0.0 size= 2235961KiB time=00:00:02.31 bitrate=7898718.1kbits/s speed=0.0813xframe=  141 fps=4.9 q=-0.0 size= 2284601KiB time=00:00:02.36 bitrate=7900038.5kbits/s speed=0.0816xframe=  144 fps=4.9 q=-0.0 size= 2316857KiB time=00:00:02.41 bitrate=7845821.4kbits/s speed=0.082x frame=  146 fps=4.9 q=-0.0 size= 2365497KiB time=00:00:02.45 bitrate=7901548.2kbits/s speed=0.0817xframe=  149 fps=4.9 q=-0.0 size= 2398009KiB time=00:00:02.50 bitrate=7849946.2kbits/s speed=0.082x frame=  151 fps=4.9 q=-0.0 size= 2446649KiB time=00:00:02.53 bitrate=7903785.6kbits/s speed=0.0818xframe=  154 fps=4.9 q=-0.0 size= 2478905KiB time=00:00:02.58 bitrate=7852993.8kbits/s speed=0.0821xframe=  156 fps=4.9 q=-0.0 size= 2527545KiB time=00:00:02.61 bitrate=7905082.9kbits/s speed=0.0818xframe=  159 fps=4.9 q=-0.0 size= 2576185KiB time=00:00:02.66 bitrate=7906135.4kbits/s speed=0.0821xframe=  161 fps=4.9 q=-0.0 size= 2608697KiB time=00:00:02.70 bitrate=7907073.1kbits/s speed=0.0819xframe=  164 fps=4.9 q=-0.0 size= 2657081KiB time=00:00:02.75 bitrate=7907295.6kbits/s speed=0.0821xframe=  166 fps=4.9 q=-0.0 size= 2673465KiB time=00:00:02.78 bitrate=7860770.3kbits/s speed=0.0819xframe=  169 fps=4.9 q=-0.0 size= 2738233KiB time=00:00:02.83 bitrate=7909127.1kbits/s speed=0.0822xframe=  172 fps=4.9 q=-0.0 size= 2770745KiB time=00:00:02.88 bitrate=7864254.0kbits/s speed=0.0824x

rawvideo here only for testing opencl and decoder alone, without x264 overhead (can't make opencl operate fully on GPU)

Not exactly stellar results, but may be GB/S in pcie bandwidth  line report in dmesg mean GigaBITS, not gigabytes? Then it should give just 4 gigabytes per second, this card only can do 8x and motherboard only PCIE 2.0