0 views collected around this technical thread.
This article explains how zero‑copy techniques such as DMA, sendfile, mmap and Direct I/O reduce data copies and context switches in Linux, compares their mechanisms, advantages and drawbacks, and shows typical use cases like Kafka for high‑performance I/O.
The article explains how traditional I/O incurs four data copies and context switches, and how DMA, zero‑copy techniques such as sendfile, mmap, splice, and Direct I/O reduce copying and system calls, improving performance for disk‑to‑network data transfers in Linux.
This article explains the concept of zero‑copy I/O, how DMA offloads data movement between memory, disks and network cards, and compares practical implementations such as sendfile, mmap and Direct I/O, highlighting their benefits, limitations and typical use cases in Linux systems.
This article explains how Linux zero‑copy mechanisms such as DMA, sendfile, mmap and Direct I/O reduce data copies and context switches, detailing their operation, advantages, limitations, and real‑world usage in systems like Kafka and MySQL.
This article explains the Linux file I/O stack by outlining the path from user space through system calls to the kernel layers—VFS, filesystem, block layer, and SCSI—detailing each layer's role, page cache mechanisms, writeback processes, and direct I/O implementations with code examples.
This article explains how zero‑copy techniques such as DMA, sendfile, mmap and Direct I/O reduce the four data copies and context switches normally required for disk‑to‑network transfers, improving performance for systems like Kafka and MySQL while outlining their trade‑offs.
This article explains how DMA offloads memory‑to‑device data transfers, reduces the four data copies and context switches of traditional I/O, and introduces zero‑copy methods such as sendfile, mmap and Direct I/O, illustrating their mechanisms, advantages, limitations, and real‑world use cases like Kafka and MySQL.
This article explains how DMA offloads memory‑to‑device data transfers, reduces the four data copies and context switches of traditional I/O, and introduces zero‑copy mechanisms such as sendfile, mmap and Direct I/O, with practical examples like Kafka and MySQL.
This article explains the principles of Linux I/O, the need for zero‑copy, the role of page and buffer caches, various data‑transfer mechanisms such as DMA, Direct I/O and mmap, and compares their performance and usage scenarios.
This article explains the hierarchical storage pyramid, Linux kernel I/O stack, page‑cache synchronization policies, the atomicity of write operations, the role of mmap and Direct I/O, and how disk characteristics influence multithreaded read/write performance and design decisions.