Topic

linux scheduling

2 posts

nice / ionice Lab: CPU Nice 19 Slowdown and Idle-Class Disk

Hands-on nice/ionice lab: victim nice19 under 6 hogs ~5.7× slower (p95 ~7.4s); ionice idle O_DIRECT read ~6.1× under writers. Real numbers, no Docker.

1 Oct 20266 min read

Context-Switch Microbench: Pipe Ping-Pong Process vs Thread

Hands-on ctx-switch lab: process pipe RTT p50 3.2 us (~0.50M sw/s); thread pipe 2.85 us; Event 9.3 us; 6 hogs blow p95 to 19 us. Real numbers, no Docker.

1 Oct 20265 min read