April 30, 2006

Linux: Benchmarking the Lockless Pagecache

Anticipatory I/O scheduler author Nick Piggin [interview] has been maintaining a lockless pagecache patch for many months. In March he provided a draft document that details the lockless radix-tree utilized by the pagecache [pdf], in which it describes the Read-Copy Update (RCU) algorithm used to share a dynamic data structure without using locks. Jens Axboe recently posted some benchmark results demonstrating some workloads that benefit from the lockless pagecache.

Link: KernelTrap.org

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