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With cgroups, it's possible to allocate resources dynamically to process
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Example
- Installation (On CentOS)
sudo yum install -y \
libcgroup \
libcgroup-tools # the service
Management
List
lscgroup list all cgroups
Example:
- list all cgroups which are in hierarchy containing cpu controller
lscgroup -g cpu:/
- list all cgroups which are in hierarchy containing cpu controller in subgroup student
lscgroup -g cpu:/student
- list all cgroups which in all hierarchies
lscgroup
Create
See cgcreate
Set
See cgset
Example
50% CPU
- Create a group with the cpu scheme
sudo cgcreate -g cpu:/cpu_50
- Set the shares of the CPU where the shares are a portion of the CPU utilization. Every process get by defaults 1024 shares
sudo cgset -r cpu.shares=512 cpu_50
- Usage
sudo cgexec -g cpu:cpu_50 mybigcommand