This commit add cpu.offline to cpu cgroup, echo 1 > cpu.offline would
convert all tasks under this cgroup to offline task. Beside, a new
sysctl sysctl_sched_bt_ignore_cpubind is added, which makes offline
tasks ignoring CPU binding and running on any CPU.
Signed-off-by: Xiaoming Gao <newtongao@tencent.com>
Signed-off-by: Hua Liu <shookliu@tencent.com>
Signed-off-by: Xiaogguang Chen <xiaoggchen@tencent.com>
Signed-off-by: Zhiguang Peng <zgpeng@tencent.com>
Signed-off-by: Bin Fan <tombinfan@tencent.com>
Signed-off-by: He Chen <heddchen@tencent.com>
Offline tasks (BT tasks) may have some performance impact to online
tasks.
In this commit, we introduce Intel RDT features to limit offline tasks
L3 cache usage to avoid the influence caused by offline tasks.
Signed-off-by: Xiaoguang Chen <xiaoggchen@tencent.com>
Signed-off-by: He Chen <heddchen@tencent.com>
The offline scheduler named BT sched is based on the CFS scheduler. We
also use the rb-tree as the run queue to save the runnable tasks. And the
vruntime concept is also used in the offline scheduler. And the priority
of offline scheduler is from 140 to 179. So now the schedulers in the
kernel are as follows: stop, RT, CFS, BT and idle.
Signed-off-by: Xiaoming Gao <newtongao@tencent.com>
Signed-off-by: Hua Liu <shookliu@tencent.com>
Signed-off-by: Xiaogguang Chen <xiaoggchen@tencent.com>
Signed-off-by: Zhiguang Peng <zgpeng@tencent.com>
Signed-off-by: Bin Fan <tombinfan@tencent.com>
Signed-off-by: He Chen <heddchen@tencent.com>
The value of the cpuset.stat process field will be abnormal in
some scenarios. The reason for this problem is that the sum of
process_counts may be negative for several cpus.
Signed-off-by: brookxu <brookxu@tencent.com>
We add cpuinfo and stat for each container which
used for docker to get cpu stat just for current
container.
Signed-off-by: Xiaoming Gao <newtongao@tencent.com>
Signed-off-by: Weiwei Li <nuonuoli@tencent.com>
Signed-off-by: Liu Hua <shookliu@tencent.com>
create a pid mapping data to parent processes in file /proc/$PID/status
create a proc file (/proc/$PID/hostinfo), mapping pid data to host pid
Signed-off-by: Lorin Liu <lorinliu@tencent.com>
zgpeng