2 Commits

Author	SHA1	Message	Date
Heran Yang	104b8dc951	libct/cg: add swapOnlyUsage in MemoryStats ... This field reports swap-only usage. For cgroupv1, `Usage` and `Failcnt` are set by subtracting memory usage from memory+swap usage. For cgroupv2, `Usage`, `Limit`, and `MaxUsage` are set. This commit also export `MaxUsage` of memory under cgroupv2 mode, using `memory.peak` introduced in kernel 5.19. Signed-off-by: Heran Yang <heran55@126.com>	2023-10-25 09:47:25 +08:00
Alexander Eldeib	7d2becdf2c	libct/cg/fs2: use file + anon + swap for usage ... This aligns v2 usage calculations more closely with v1. Current node-level reporting for v1 vs v2 on the same machine under similar load may differ by ~250-750Mi. Also return usage as combined swap + memory usage, aligned with v1 and non-root v2 cgroups. `mem_cgroup_usage` in the kernel counts NR_FILE_PAGES + NR_ANON_MAPPED + `nr_swap_pages` (if swap enabled) [^0]. Using total - free results in higher "usage" numbers. This is likely due to various types of reclaimable memory technically counted as in use (e.g. inactive anon). See also https://github.com/kubernetes/kubernetes/issues/118916 for more context [^0]: https://github.com/torvalds/linux/blob/06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5/mm/memcontrol.c#L3673-L3680 Signed-off-by: Alexander Eldeib <alexeldeib@gmail.com>	2023-08-02 15:18:22 +02:00