From: "Rémi Denis-Courmont" <remi@remlab.net>
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH v3 1/9] lavc/vp8dsp: R-V put_vp8_pixels
Date: Sat, 11 May 2024 17:39:12 +0300
Message-ID: <8709155.vrFXyRyurE@basile.remlab.net> (raw)
In-Reply-To: <tencent_D194C30C794654632D3086128ACBE6BAB109@qq.com>
Le maanantaina 6. toukokuuta 2024, 6.38.01 EEST uk7b@foxmail.com a écrit :
> From: sunyuechi <sunyuechi@iscas.ac.cn>
>
> C908:
> vp8_put_pixels4_c: 78.0
> vp8_put_pixels4_rvi: 33.7
> vp8_put_pixels8_c: 278.0
> vp8_put_pixels8_rvi: 55.0
> vp8_put_pixels16_c: 999.0
> vp8_put_pixels16_rvi: 86.7
Actually, I do think that the C compiler is doing a better job.
On SiFive U74, the figures are horrible:
By time:
vp8_put_pixels4_c: 0.2
vp8_put_pixels4_rvi: 10.5
vp8_put_pixels8_c: 1.0
vp8_put_pixels8_rvi: 30.0
vp8_put_pixels16_c: 2.2
vp8_put_pixels16_rvi: 60.0
By cycles:
vp8_put_pixels4_c: 84.0
vp8_put_pixels4_rvi: 3871.0
vp8_put_pixels8_c: 331.0
vp8_put_pixels8_rvi: 11281.2
vp8_put_pixels16_c: 826.0
vp8_put_pixels16_rvi: 22502.0
Best guess is that the data is not 64-bit aligned, otherwise I can't really
make sense of those figures.
--
Rémi Denis-Courmont
http://www.remlab.net/
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next prev parent reply other threads:[~2024-05-11 14:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 3:38 uk7b
2024-05-11 14:39 ` Rémi Denis-Courmont [this message]
2024-05-11 16:03 ` flow gg
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