add runc shim support for sched core

In linux 5.14 and hopefully some backports, core scheduling allows processes to
be co scheduled within the same domain on SMT enabled systems.

The containerd impl sets the core sched domain when launching a shim. This
allows a clean way for each shim(container/pod) to be in its own domain and any
additional containers, (v2 pods) be be launched with the same domain as well as
any exec'd process added to the container.

kernel docs: https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/core-scheduling.html

Signed-off-by: Michael Crosby <michael@thepasture.io>

runtime/v2/binary.go

@@ -35,12 +35,20 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-func shimBinary(bundle *Bundle, runtime, containerdAddress string, containerdTTRPCAddress string) *binary {
+type shimBinaryConfig struct {
+	runtime      string
+	address      string
+	ttrpcAddress string
+	schedCore    bool
+}
+
+func shimBinary(bundle *Bundle, config shimBinaryConfig) *binary {
 	return &binary{
 		bundle:                 bundle,
-		runtime:                runtime,
-		containerdAddress:      containerdAddress,
-		containerdTTRPCAddress: containerdTTRPCAddress,
+		runtime:                config.runtime,
+		containerdAddress:      config.address,
+		containerdTTRPCAddress: config.ttrpcAddress,
+		schedCore:              config.schedCore,
 	}
 }
 
@@ -48,6 +56,7 @@ type binary struct {
 	runtime                string
 	containerdAddress      string
 	containerdTTRPCAddress string
+	schedCore              bool
 	bundle                 *Bundle
 }
 
@@ -61,13 +70,15 @@ func (b *binary) Start(ctx context.Context, opts *types.Any, onClose func()) (_
 
 	cmd, err := client.Command(
 		ctx,
-		b.runtime,
-		b.containerdAddress,
-		b.containerdTTRPCAddress,
-		b.bundle.Path,
-		opts,
-		args...,
-	)
+		&client.CommandConfig{
+			Runtime:      b.runtime,
+			Address:      b.containerdAddress,
+			TTRPCAddress: b.containerdTTRPCAddress,
+			Path:         b.bundle.Path,
+			Opts:         opts,
+			Args:         args,
+			SchedCore:    b.schedCore,
+		})
 	if err != nil {
 		return nil, err
 	}
@@ -138,14 +149,19 @@ func (b *binary) Delete(ctx context.Context) (*runtime.Exit, error) {
 	}
 
 	cmd, err := client.Command(ctx,
-		b.runtime,
-		b.containerdAddress,
-		b.containerdTTRPCAddress,
-		bundlePath,
-		nil,
-		"-id", b.bundle.ID,
-		"-bundle", b.bundle.Path,
-		"delete")
+		&client.CommandConfig{
+			Runtime:      b.runtime,
+			Address:      b.containerdAddress,
+			TTRPCAddress: b.containerdTTRPCAddress,
+			Path:         bundlePath,
+			Opts:         nil,
+			Args: []string{
+				"-id", b.bundle.ID,
+				"-bundle", b.bundle.Path,
+				"delete",
+			},
+		})
+
 	if err != nil {
 		return nil, err
 	}