Opened 3 months ago
Last modified 2 months ago
#11221 open defect
TSAN reported races
| Reported by: | Clément Bœsch | Owned by: | elenril |
|---|---|---|---|
| Priority: | normal | Component: | avcodec |
| Version: | git-master | Keywords: | race tsan |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
TSAN reports a few race instances: https://fate.ffmpeg.org/report.cgi?slot=x86_64-archlinux-gcc-tsan&time=20241002095506
Most of them seem to happen in padding_bug_score in h263 decoder and gray/non_gray in h264 decoder. There are a few others (for example h264 slice_table also seems affected) but these two are the main contenders.
With slice threading, HEVC seems to show up as well: https://fate.ffmpeg.org/report.cgi?time=20241002101743&slot=x86_64-archlinux-gcc-tsan-slices
This HEVC slice threading issue seems to be the cause of actual deadlocks, even without TSAN: https://fate.ffmpeg.org/report.cgi?slot=x86_64-archlinux-gcc-threads-misc&time=20241001152120
Change History (2)
comment:1 by , 3 months ago
| Owner: | set to |
|---|---|
| Reproduced by developer: | set |
| Status: | new → open |
comment:2 by , 2 months ago
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HEVC slice threading issues should be fixed in 79c47dfd25f101b6842bbec8c6ffef8d5077c3ae