// See issue 37262 for details.

	// GC twice, once to reach a stable heap state
	// and again to make sure we finish the sweep phase.
	runtime.GC()
	runtime.GC()

	// Disable preemption so we stay on one P's tiny allocator and
	// nothing else allocates from it.
	runtime.Acquirem()

	// Make 1-byte allocations until we get a fresh tiny slot.
	aligned := false
	for i := 0; i < 16; i++ {

	// cost of maintaining this consistency is low. We're not going to hold this semaphore
	// for very long and most STW periods are very short.
	// Once we hold worldsema, prevent preemption as well so we're not interrupted partway
	// through this. We want to get this done as soon as possible.
	semacquire(&worldsema)
	mp := acquirem()

	// Advance the generation or stop the trace.

    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass
    # for more detail.
    priorityClassName: ""

    proxy:
      image: proxyv2

      # CAUTION: It is important to ensure that all Istio helm charts specify the same clusterDomain value

	// will not actually return to the original frame, so the registers
	// are effectively dead. But this does mean we can't use the
	// same mechanism for async preemption.
	if ep.context.ip() == abi.FuncPCABI0(sigresume) {
		// sigresume has already been set up by a previous exception.
		return ret
	}
	prepareContextForSigResume(ep.context)
	ep.context.set_sp(gp.m.g0.sched.sp)

// Called on the new thread, cannot allocate memory.
func minit() {
	minitSignals()

	// Cgo-created threads and the bootstrap m are missing a
	// procid. We need this for asynchronous preemption and it's
	// useful in debuggers.
	getg().m.procid = uint64(gettid())
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()

imagePullPolicy| [ImagePullPolicy](https://kubernetes.io/docs/concepts/containers/images/)
priorityClassName | [priority class name](https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass)
nodeSelector| [node selector](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector)

	// unsafe-points.
	allUnsafe bool
	// unsafePoints bit i is set if Value ID i is an unsafe-point
	// (preemption is not allowed). Only valid if !allUnsafe.
	unsafePoints bitvec.BitVec
	// unsafeBlocks bit i is set if Block ID i is an unsafe-point
	// (preemption is not allowed on any end-of-block
	// instructions). Only valid if !allUnsafe.
	unsafeBlocks bitvec.BitVec

	// reserved for arguments but not return values. retOffset
	// is the offset at which return values begin, and
	// spill is the size in bytes of additional space reserved
	// to spill argument registers into in case of preemption in
	// reflectcall's stack frame.
	stackCallArgsSize, retOffset, spill uintptr

	// stackPtrs is a bitmap that indicates whether
	// each word in the ABI stack space (stack-assigned

  maxSurge: 100%

## Update strategy for StatefulSets
statefulSetUpdate:
  updateStrategy: RollingUpdate

## Pod priority settings
## ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/
##
priorityClassName: ""

## Pod runtime class name
## ref https://kubernetes.io/docs/concepts/containers/runtime-class/
##
runtimeClassName: ""

## Set default rootUser, rootPassword

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package preemption

import (
	"context"
	"fmt"
	"sort"
	"testing"

	"github.com/google/go-cmp/cmp"
	v1 "k8s.io/api/core/v1"
	policy "k8s.io/api/policy/v1"
	"k8s.io/apimachinery/pkg/runtime"