lör 2022-06-18 klockan 16:50 +0200 skrev Anton Khirnov: > Quoting Tomas Härdin (2022-06-14 16:39:00) > > Patch 12 in this series is optional since it's just me getting the > > speed up on a specific machine > > > > /Tomas > > > > From 115aa26c343419e81c1b5ba0bfdb1615cbec27e9 Mon Sep 17 00:00:00 > > 2001 > > From: =?UTF-8?q?Tomas=20H=C3=A4rdin?= <g...@haerdin.se> > > Date: Fri, 10 Jun 2022 14:10:02 +0200 > > Subject: [PATCH 01/13] lavc/jpeg2000dec: Finer granularity > > threading > > > > Decoding and dequant is now threaded on codeblock level. > > IDWT is threaded on component level. > > MCT and write_frame() remain threaded on tile level. > > > > This brings lossless 4K J2K with -lowres 2 -thread_type slice - > > threads 96 on an AMD EPYC 7R32 from 4.8 fps (177% CPU) to 31 fps > > (1284% CPU). > > Any measurable impact on single-threaded or frame-threaded decoding? >
median of 11 runs with -threads 1 -vframes 100 on a 4K file before: real 0m38,664s after: real 0m39,139s I have in mind to try and roll together the last step in the IDWT code with the av_clip() in write_frame() which should improve run time in all cases. /Tomas _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
