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AVX512_changes #478

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deeptiag1
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@deeptiag1 deeptiag1 commented Feb 19, 2020 •
edited by tianjunwork
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Signed-off-by: deeptiag1 [email protected]

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1480c1 commented Feb 19, 2020

@deeptiag1, you may want to check your git config, it seems you might have misspelled your email, unless your email domain is intel.comm

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tianjunwork commented Feb 19, 2020 •
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Hi @deeptiag1 , since AVX512 code doesn't execute when running encoder, our CI can't validate your code. Could you let us know what tests you did and the result? Thank you very much for your contribution.
Could you also give a better title to this PR which be more specific. Thank you.

@tianjunwork tianjunwork added the enhancement New feature or request label Feb 19, 2020
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Hi @tianjunwork, Enable the AVX512 flag in Ebdefinitions and then run the same test as one would run for any build. Let me know if all test pass.

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hassount
hassount reviewed Mar 4, 2020
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Source/Lib/ASM_AVX2/EbTransforms_Intrinsic_AVX512.c Outdated
@@ -0,0 +1,195 @@
#include "EbTransforms_AVX2.h"
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License header missing

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Fixed

hassount
hassount reviewed Mar 4, 2020
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Source/Lib/ASM_SSSE3/EbMcp_Intrinsic_AVX512.c Outdated
@@ -0,0 +1,457 @@
#include "EbMcp_SSSE3.h"
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missing license header

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the AVX512 code should be moved to the AVX2 project

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Fixed

hassount
hassount reviewed Mar 4, 2020
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Source/Lib/ASM_AVX2/EbTransforms_Intrinsic_AVX512.c Outdated
54, 67, -31, -73, 4, 78, 22, -82, 54, 67, -31, -73, 4, 78, 22, -82, -46, 85, 67, -88, -82, 90, 90, -90, -46, 85, 67, -88, -82, 90, 90, -90
};

extern void EbHevcTransform32_AVX512_INTRIN(EB_S16 *src, EB_U32 src_stride, EB_S16 *dst, EB_U32 dst_stride, EB_U32 shift)
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This would be more appropriate being moved to the AVX2 project to keep all AVX512 code in the same location.

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changes_incorpoarted
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intelmark commented Mar 27, 2020 •
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From @hassount 3/17/2020:

From the results below, it seems that we need to disable the optimization for the LumaInterpolationFilterOneDOutRawHorizontal_AVX512 kernel and make sure that the documentation contains a clear reference to the gcc version requirement when vnni is on, then I don’t see any blockers to this PR moving forward assuming functional testing is passing._

The current PR shows:

#ifdef VNNI_SUPPORT
#ifndef NON_AVX512_SUPPORT
#define LumaInterpolationFilterOneDOutRawHorizontalLumaInterpolationFilterOneDOutRawHorizontal_AVX512
#else
#define LumaInterpolationFilterOneDOutRawHorizontalLumaInterpolationFilterOneDOutRawHorizontal_SSSE3
#endif

But isn't VNNI a subset of AVX512 - Are all combinations of the VNNI_SUPPORT and AVX512_SUPPORT defines possible?

Also there doesn't seem to be a mention of the gcc requirements for compiling the VNNI specific code anywhere in the PR

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intelmark
intelmark reviewed Apr 1, 2020
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README.md Outdated
@@ -69,6 +69,7 @@ In order to run the highest resolution supported by the encoder, at least 64GB o
- Download the yasm exe from the following [link](http://www.tortall.net/projects/yasm/releases/yasm-1.3.0-win64.exe)
- Rename yasm-1.3.0-win64.exe to yasm.exe
- Copy yasm.exe into a location that is in the PATH environment variable
- Vnni requires gcc version greater then 9.2.
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  1. greater than
  2. On my server it seems to be working with version: gcc version 9.2.1

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Fixed

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avx512-changes_v3
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#define vnni in EbDefinitions enable vnni code committed in this PR.

Perf Data;
Encoder mode :0
reference_avx512 : branch vnni_changes_1 @ d92a7c4
vnni_avx512: reference_avx512 + VNNI_SUPPORT + LumaInterpolationFilterOneDOutRawHorizontal_SSSE3
speed
reference_avx512 | 0.95fps
vnni_avx512 | 0.96fps
Speed gain: 1%

Encoder mode :0
reference_avx2 : branch vnni_changes_1 @ d92a7c4 + NON_AVX512_SUPPORT
vnni_avx2: reference_avx2 + VNNI_SUPPORT + LumaInterpolationFilterOneDOutRawHorizontal_SSSE3
speed
reference_avx2 | 0.96fps
vnni_avx2 | 0.97fps
Speed gain: 1%

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@deeptiag1 Regarding the performance data - great to see the speed up, but what size video and is there a command line that was used?

inteltiger
inteltiger reviewed Aug 6, 2021
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Source/Lib/ASM_SSSE3/EbMcp_Intrinsic_AVX512VNNI.c
};

#ifndef NON_AVX512_SUPPORT
void LumaInterpolationFilterOneDOutRawHorizontal_AVX512(
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why no code is calling LumaInterpolationFilterOneDOutRawHorizontal_AVX512 ?

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