| From: |
| Lu Jialin <lujialin4-AT-huawei.com> |
| To: |
| Zefan Li <lizefan.x-AT-bytedance.com>, Tejun Heo <tj-AT-kernel.org>, "Johannes Weiner" <hannes-AT-cmpxchg.org>, Andrew Morton <akpm-AT-linux-foundation.org>, Michal Hocko <mhocko-AT-kernel.org>, Roman Gushchin <roman.gushchin-AT-linux.dev>, Shakeel Butt <shakeelb-AT-google.com>, Muchun Song <songmuchun-AT-bytedance.com> |
| Subject: |
| [RFC 0/2] Introduce cgroup.top interface |
| Date: |
| Fri, 26 Aug 2022 09:15:01 +0800 |
| Message-ID: |
| <20220826011503.103894-1-lujialin4@huawei.com> |
| Cc: |
| Lu Jialin <lujialin4-AT-huawei.com>, Xiu Jianfeng <xiujianfeng-AT-huawei.com>, <cgroups-AT-vger.kernel.org>, <linux-kernel-AT-vger.kernel.org>, <linux-mm-AT-kvack.org> |
| Archive-link: |
| Article |
Cgroup is used to organize and manage resource available processes.
Currently there are no handy tool for gathering reousrce usage
information for each and every child cgroups, makes it hard to detect
resource outage and debug resource issues.
To overcome this, we present the cgroup.top interface. Just like the
top command, user is able to easily gather resource usage information
, allowing user to detect and respond to resource outage in child
cgroups
Show case:
/ # mount -t cgroup2 none /sys/fs/cgroup
/ # cd /sys/fs/cgroup/
/sys/fs/cgroup # echo "+memory" > cgroup.subtree_control
/sys/fs/cgroup # mkdir test1
/sys/fs/cgroup # mkdir test2
/sys/fs/cgroup # mkdir test3
/sys/fs/cgroup # echo $$ > test2/cgroup.procs
/sys/fs/cgroup # cd /test
/test # ./memcg_malloc 512000 &
/test # ./memcg_malloc 512000 &
/test # ./memcg_malloc 512000 &
/test # cd /sys/fs/cgroup
/sys/fs/cgroup # echo $$ > test1/cgroup.procs
/sys/fs/cgroup # cd /test
/test # ./memcg_malloc 512000 &
/test # cd /sys/fs/cgroup
/sys/fs/cgroup # echo $$ > test3/cgroup.procs
/sys/fs/cgroup # cat cgroup.top
memory top:
name usage anon file kernel
test2 1974272 1671168 0 270336
test1 700416 569344 0 94208
test3 196608 86016 0 86016
Lu Jialin (1):
memcg: Adapt cgroup.top into per-memcg
Xiu Jianfeng (1):
cgroup: Introduce per-cgroup resource top show interface
include/linux/cgroup-defs.h | 1 +
kernel/cgroup/cgroup.c | 20 +++++++++
mm/memcontrol.c | 87 +++++++++++++++++++++++++++++++++++++
3 files changed, 108 insertions(+)
--
2.17.1
