linux/kernel/cgroup
Waiman Long f28e22441f cgroup/cpuset: Add a new isolated cpus.partition type
Cpuset v1 uses the sched_load_balance control file to determine if load
balancing should be enabled.  Cpuset v2 gets rid of sched_load_balance
as its use may require disabling load balancing at cgroup root.

For workloads that require very low latency like DPDK, the latency
jitters caused by periodic load balancing may exceed the desired
latency limit.

When cpuset v2 is in use, the only way to avoid this latency cost is to
use the "isolcpus=" kernel boot option to isolate a set of CPUs. After
the kernel boot, however, there is no way to add or remove CPUs from
this isolated set. For workloads that are more dynamic in nature, that
means users have to provision enough CPUs for the worst case situation
resulting in excess idle CPUs.

To address this issue for cpuset v2, a new cpuset.cpus.partition type
"isolated" is added which allows the creation of a cpuset partition
without load balancing. This will allow system administrators to
dynamically adjust the size of isolated partition to the current need
of the workload without rebooting the system.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2022-09-04 10:47:27 -10:00
..
cgroup-internal.h cgroup: Use cgroup_attach_{lock,unlock}() from cgroup_attach_task_all() 2022-08-26 11:14:34 -10:00
cgroup-v1.c cgroup: Use cgroup_attach_{lock,unlock}() from cgroup_attach_task_all() 2022-08-26 11:14:34 -10:00
cgroup.c cgroup: Remove data-race around cgrp_dfl_visible 2022-09-04 09:16:19 -10:00
cpuset.c cgroup/cpuset: Add a new isolated cpus.partition type 2022-09-04 10:47:27 -10:00
debug.c
freezer.c cgroup: cleanup comments 2022-03-13 19:19:27 -10:00
legacy_freezer.c
Makefile cgroup: Add misc cgroup controller 2021-04-04 13:34:46 -04:00
misc.c misc_cgroup: remove error log to avoid log flood 2021-09-20 07:35:38 -10:00
namespace.c memcg: enable accounting for new namesapces and struct nsproxy 2021-09-03 09:58:12 -07:00
pids.c cgroup: add pids.peak interface for pids controller 2022-09-04 09:26:51 -10:00
rdma.c cgroup: fix spelling mistakes 2021-05-24 12:45:26 -04:00
rstat.c sched/core: add forced idle accounting for cgroups 2022-07-04 09:23:07 +02:00