HONOR’s new DMA-BUF direct I/O patches deliver 3776MB/s throughput—a 265% performance gain—for AI model loading, UFS4.0 storage, and real-time data streaming. Learn how this tech reduces latency, power use, and RAM overhead.
Breakthrough in Storage Performance: Direct I/O for DMA-BUF
Smart device innovator HONOR has unveiled a game-changing patch series enabling direct I/O support for DMA-BUF via the DMA_BUF_IOCTL_RW_FILE flag. This advancement eliminates page-cache bottlenecks, slashes latency, and accelerates throughput—critical for AI workloads, real-time data processing, and high-speed storage.
Why This Matters for AI & High-Performance Computing
4.8x faster throughput: From 1032MB/s to 3776MB/s on UFS4.0 storage (capable of 4GB/s).
Lower latency than UDMABUF, reducing delays in AI model loading and task snapshots.
Reduced power consumption: Bypassing buffered I/O cuts memory copies and CPU overhead.
"This optimization is a milestone for edge AI, where storage speed dictates real-time responsiveness."
Technical Deep Dive: How DMA-BUF Direct I/O Works
1. Eliminating Page-Cache Overhead
Traditional buffered I/O forces data through the Linux page cache, adding latency. HONOR’s patch bypasses this layer, enabling direct storage-to-application transfers.
2. Memory Efficiency Gains
Zero-copy architecture: Removes redundant data duplication.
Lower RAM usage: Critical for mobile devices and embedded AI systems.
3. Benchmark Results
| Metric | Before Patch | After Patch | Improvement |
|---|---|---|---|
| Throughput | 1032MB/s | 3776MB/s | 265% faster |
| Latency | Higher | Reduced | ~40% lower |
| Power Efficiency | Moderate | Optimized | Less CPU/IO |
FAQ:
Q: How does this compare to NVIDIA’s GPUDirect?
A: Focused on storage I/O rather than GPU DMA, but complementary for full-stack acceleration.
Q: Will this patch benefit Android devices?
A: Yes—especially flagship phones and AI-powered wearables using UFS storage.
Q: When will this be merged into Linux mainline?
A: HONOR is actively submitting patches; follow [Linux Kernel Mailing List] for updates.
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