Subject: Optimizing FFmpeg performance without huge pages - seeking advice
Hello FFmpeg community,
I am seeking advice on optimizing FFmpeg performance while explicitly
avoiding the use of huge pages/transparent huge pages.
**Environment:**
- FFmpeg version: 4.1.11
- System: Linux with transparent huge pages currently set to [madvise]
- Goal: Disable huge pages entirely and optimize for standard 4K pages
**Background:**
For our specific use case, we prefer to avoid huge pages due to concerns
about memory fragmentation and allocation latency. We want to configure
our system to use only standard 4K pages but maintain optimal FFmpeg
performance.
**Questions:**
1. Are there specific FFmpeg build-time or runtime configuration options
that work better with standard page sizes?
2. Should we adjust any specific FFmpeg options like:
- Thread count (-threads)
- Buffer sizes
- Memory pool settings
Or any other parameters that might compensate for the lack of huge
pages?
3. Have there been any benchmarks comparing FFmpeg performance with
huge pages disabled vs enabled?
**Current approach:**
We plan to set /sys/kernel/mm/transparent_hugepage/enabled to "never"
and are looking for FFmpeg-specific optimizations to maintain good
performance with this configuration.
Any recommendations for optimizing FFmpeg in a standard page environment
would be greatly appreciated.
Thank you for your time and expertise.
Best regards,
Zijian Zhu
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