buffer management

OPPO Kernel Craftsman

Apr 26, 2024 · Fundamentals

Introduction to V4L2 and Its Role in Video Codec Development

V4L2 is the Linux kernel framework that unifies video device access, abstracts complex multi‑IC hardware into sub‑devices, and provides core, platform, and sensor driver layers, while supporting capture, output, and M2M codec operations with sophisticated buffer management—including mmap, userptr, and DMA‑Buf for zero‑copy processing on Android.

DMABUFLinux kernelM2M

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Introduction to V4L2 and Its Role in Video Codec Development

Ximalaya Technology Team

Jul 13, 2023 · Mobile Development

Ximalaya Live Streaming Instant-Start Optimization Practices

Ximalaya improves live‑stream start‑up by measuring first‑frame latency, optimizing push (dynamic bitrate, GOP caching) and pull (RTMP/HTTP‑FLV, HttpDNS, pre‑fetch URLs, progressive component loading, pre‑render SurfaceView, low‑buffer water‑level) across detailed pipeline stages, achieving over 90 % audio and 85 % video instant‑open rates while planning H.265 adoption.

HTTP-FLVMobile DevelopmentPerformance Optimization

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Ximalaya Live Streaming Instant-Start Optimization Practices

Tencent Tech

Jun 25, 2021 · Databases

How Tencent Cloud’s Spitfire and Distributed DB Innovations Won SIGMOD 2021

Two Tencent Cloud database papers—Spitfire’s three‑tier buffer manager and a high‑performance strong‑consistency engine for distributed systems—were accepted at ACM SIGMOD 2021, showcasing innovative use of NVM, AI‑driven tuning, and cloud‑native architecture to boost performance and cost efficiency.

NVMbuffer managementcloud native

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How Tencent Cloud’s Spitfire and Distributed DB Innovations Won SIGMOD 2021

Tencent Database Technology

Jan 28, 2021 · Databases

Tencent Cloud Database Kernel Research Accepted at SIGMOD and ICDE: Spitfire Buffer Manager and TLBtree Index

Tencent Cloud's native database team announced two breakthrough research papers—Spitfire, a three‑tier buffer manager for DRAM and NVM, and TLBtree, a read/write‑optimized tree index for non‑volatile memory—both accepted at top‑tier conferences SIGMOD and ICDE, highlighting novel memory‑aware storage techniques and collaborative achievements with leading universities.

ICDEIndex StructuresNon-Volatile Memory

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Tencent Cloud Database Kernel Research Accepted at SIGMOD and ICDE: Spitfire Buffer Manager and TLBtree Index

Tencent Cloud Developer

Jan 14, 2021 · Databases

PostgreSQL Master-Slave Replication Performance Optimization: Solving Drop Table Bottleneck

The article explains how massive DROP TABLE operations in PostgreSQL master‑slave replication trigger costly buffer‑invalidation loops that cause severe lag, and describes extracting this step into a separate subprocess with a shared hash table, cutting replication lag from over 400 GB to about 10 MB—a 30,000‑fold speedup.

Database InternalsDatabase ReplicationMaster-Slave Replication

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PostgreSQL Master-Slave Replication Performance Optimization: Solving Drop Table Bottleneck