diff options
Diffstat (limited to 'Documentation/cgroups/cpuacct.txt')
| -rw-r--r-- | Documentation/cgroups/cpuacct.txt | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/Documentation/cgroups/cpuacct.txt b/Documentation/cgroups/cpuacct.txt index 8b930946c52a..9ad85df4b983 100644 --- a/Documentation/cgroups/cpuacct.txt +++ b/Documentation/cgroups/cpuacct.txt | |||
| @@ -10,26 +10,25 @@ directly present in its group. | |||
| 10 | 10 | ||
| 11 | Accounting groups can be created by first mounting the cgroup filesystem. | 11 | Accounting groups can be created by first mounting the cgroup filesystem. |
| 12 | 12 | ||
| 13 | # mkdir /cgroups | 13 | # mount -t cgroup -ocpuacct none /sys/fs/cgroup |
| 14 | # mount -t cgroup -ocpuacct none /cgroups | 14 | |
| 15 | 15 | With the above step, the initial or the parent accounting group becomes | |
| 16 | With the above step, the initial or the parent accounting group | 16 | visible at /sys/fs/cgroup. At bootup, this group includes all the tasks in |
| 17 | becomes visible at /cgroups. At bootup, this group includes all the | 17 | the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup. |
| 18 | tasks in the system. /cgroups/tasks lists the tasks in this cgroup. | 18 | /sys/fs/cgroup/cpuacct.usage gives the CPU time (in nanoseconds) obtained |
| 19 | /cgroups/cpuacct.usage gives the CPU time (in nanoseconds) obtained by | 19 | by this group which is essentially the CPU time obtained by all the tasks |
| 20 | this group which is essentially the CPU time obtained by all the tasks | ||
| 21 | in the system. | 20 | in the system. |
| 22 | 21 | ||
| 23 | New accounting groups can be created under the parent group /cgroups. | 22 | New accounting groups can be created under the parent group /sys/fs/cgroup. |
| 24 | 23 | ||
| 25 | # cd /cgroups | 24 | # cd /sys/fs/cgroup |
| 26 | # mkdir g1 | 25 | # mkdir g1 |
| 27 | # echo $$ > g1 | 26 | # echo $$ > g1 |
| 28 | 27 | ||
| 29 | The above steps create a new group g1 and move the current shell | 28 | The above steps create a new group g1 and move the current shell |
| 30 | process (bash) into it. CPU time consumed by this bash and its children | 29 | process (bash) into it. CPU time consumed by this bash and its children |
| 31 | can be obtained from g1/cpuacct.usage and the same is accumulated in | 30 | can be obtained from g1/cpuacct.usage and the same is accumulated in |
| 32 | /cgroups/cpuacct.usage also. | 31 | /sys/fs/cgroup/cpuacct.usage also. |
| 33 | 32 | ||
| 34 | cpuacct.stat file lists a few statistics which further divide the | 33 | cpuacct.stat file lists a few statistics which further divide the |
| 35 | CPU time obtained by the cgroup into user and system times. Currently | 34 | CPU time obtained by the cgroup into user and system times. Currently |