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diff --git a/website/content/en/status/report-2021-04-2021-07/racct.adoc b/website/content/en/status/report-2021-04-2021-07/racct.adoc new file mode 100644 index 0000000000..22e9b82ad5 --- /dev/null +++ b/website/content/en/status/report-2021-04-2021-07/racct.adoc @@ -0,0 +1,28 @@ +=== Racct (Resource Accounting) Bug Fixes and Improvements + +Links: + +link:https://github.com/samuelkarp/runj/pull/11[racct PR for runj] URL: link:https://github.com/samuelkarp/runj/pull/11[https://github.com/samuelkarp/runj/pull/11] + +Contact: Cyril Zhang <cyril@freebsdfoundation.org> + +racct is a resource accounting system in the FreeBSD kernel. +It keeps track of resource usage, such as memory use and CPU runtime. +Additionally, it provides an easy interface for limiting the resource usage of entities such as users and, importantly, jails. +For example, it may be of interest to set a limit on the number of CPUs that a jail can use. + +I have been discussing with other FreeBSD developers the prospect of adding racct support as an experimental feature to an OCI-compliant container runtime, runj by Samuel Karp. +This would mimic Linux's cgroups functionality in the OCI specification, which allows Linux containers to have limits on memory, CPU usage, etc. +It also allows us to consider the possibility of adding FreeBSD-specific configuration to the OCI specification. +As part of this work, I have been improving racct so that it is more functional for use with jails. + +Improvements include: + +* A new, more accurate scheme for calculating total CPU usage of all processes in a jail +* Fixing a bug that incorrectly counted the runtime of all child processes in the parent's runtime +* Fixing a bug that incorrectly decremented the count of persistent resources, such as shared memory, when a process exits +* Accounting for POSIX features like shared memory and semaphores, where previously only SysV features were accounted for +* Adding tests + +Feel free to get in touch. + +Sponsor: The FreeBSD Foundation |