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specs: linux: add intel_rdt cgroup support in specs #267

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specs: linux: add intel_rdt cgroup support in specs #267

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19 changes: 18 additions & 1 deletion config-linux.md
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Expand Up @@ -163,7 +163,7 @@ In addition to any devices configured with this setting, the runtime MUST also s
## Control groups

Also known as cgroups, they are used to restrict resource usage for a container and handle device access.
cgroups provide controls to restrict cpu, memory, IO, pids and network for the container.
cgroups provide controls to restrict cpu, memory, IO, pids, network and intel_rdt for the container.
For more information, see the [kernel cgroups documentation][cgroup-v1].

The path to the cgroups can be specified in the Spec via `cgroupsPath`.
Expand Down Expand Up @@ -454,6 +454,23 @@ The following paramters can be specified to setup the controller:
}
```

#### Intel rdt

`intelRdt` represents the cgroup subsystem `intel_rdt`.
For more information, see [the intel_rdt cgroup man page](https://lkml.org/lkml/2015/12/17/574).

The following paramters can be specified to setup the controller:

* **`l3Cbm`** *(uint64, optional)* - specifies L3 cache capacity bitmask (CBM) in the cgroup

###### Example

```json
"intelRdt": {
"l3Cbm": 4080
}
```

## Sysctl

sysctl allows kernel parameters to be modified at runtime for the container.
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8 changes: 8 additions & 0 deletions config_linux.go
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Expand Up @@ -211,6 +211,12 @@ type Network struct {
Priorities []InterfacePriority `json:"priorities,omitempty"`
}

// IntelRdt for Linux cgroup 'intel_rdt' resource management
type IntelRdt struct {
// L3 cache capacity bitmask (CBM) for container
L3Cbm *uint64 `json:"l3Cbm,omitempty"`
}

// Resources has container runtime resource constraints
type Resources struct {
// Devices are a list of device rules for the whitelist controller
Expand All @@ -231,6 +237,8 @@ type Resources struct {
HugepageLimits []HugepageLimit `json:"hugepageLimits,omitempty"`
// Network restriction configuration
Network *Network `json:"network,omitempty"`
// IntelRdt restriction configuration
IntelRdt *IntelRdt `json:"intelRdt,omitempty"`
}

// Device represents the mknod information for a Linux special device file
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