c593e3605e
Periodically report a page fault counter in the scheduler output. The user-space scheduler should never trigger page faults, otherwise we may experience deadlocks (that would trigger the sched-ext watchdog, unloading the scheduler). Reporting a page fault counter periodically to stdout can be really helpful to debug potential issues with the custom allocator. Moreover, group together also nr_sched_congested and nr_failed_dispatches with nr_page_faults and use the sum of all these counters to determine the healthy status of the user-space scheduler (reporting it to stdout as well). Signed-off-by: Andrea Righi <andrea.righi@canonical.com> |
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| README.md | ||
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SCHED_EXT SCHEDULERS
Introduction
This directory contains the repo's schedulers.
Some of these schedulers are simply examples of different types of schedulers that can be built using sched_ext. They can be loaded and used to schedule on your system, but their primary purpose is to illustrate how various features of sched_ext can be used.
Other schedulers are actually performant, production-ready schedulers. That is, for the correct workload and with the correct tuning, they may be deployed in a production environment with acceptable or possibly even improved performance. Some of the examples could be improved to become production schedulers.
Please see the following README files for details on each of the various types of schedulers:
- rust describes all of the schedulers with rust user space components. All of these schedulers are production ready.
- c describes all of the schedulers with C user space components. All of these schedulers are production ready.
Note on syncing
Note that there is a sync-to-kernel.sh script in this directory. This is used to sync any changes to the specific schedulers with the Linux kernel tree. If you've made any changes to a scheduler in please use the script to synchronize with the sched_ext Linux kernel tree:
$ ./sync-to-kernel.sh /path/to/kernel/tree