I am a Linux kernel developer (working for Red Hat) by day and an anti-spam activist by night. For some values of "day" and "night", of course. In my spare time I hike mountains and play with radios (and radio software).
I am the admin of this wiki, and try to make sure it all runs smoothly.
If you ever run into technical problems with this wiki, please send me an email (email@example.com) and I will fix things.
Rik van Riel
OPW Round 12 small tasks:
- Cause the system to swap, and use ftrace and the trace points in mm/page_alloc.c and mm/vmscan.c to determine how long it takes to allocate (and free) pages.
- Repeat the same exercise when the system is under heavy filesystem read IO, and when doing lots of filesystem writes (enough to fill up memory).
- Use kernelshark to visually examine the observed latencies.
- You can email me your ftrace commandlines (or scripts), observations, and questions.