},
	)
	// nodePortAllocation counts the total number of ports allocation and allocation mode: static or dynamic.
	nodePortAllocations = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "allocation_total",
			Help:           "Number of NodePort allocations",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"scope"},
	)

	link *Obj32
	pad  [32 - unsafe.Sizeof(uintptr(0))]byte
}

var persistentMemSink *Obj32

func allocatePersistent1K() {
	for i := 0; i < 32; i++ {
		// Can't use slice because that will introduce implicit allocations.
		obj := &Obj32{link: persistentMemSink}
		persistentMemSink = obj
	}
}

// Allocate transient memory using reflect.Call.

func allocateReflectTransient() {
	memSink = make([]byte, 2<<20)
}

// `sysAlloc`, `persistentalloc`, r`fixalloc`, or from a manually-managed span).
//
// Specifically:
//
// 1. `new(T)`, `make([]T)`, `append([]T, ...)` and implicit heap
// allocation of T are disallowed. (Though implicit allocations are
// disallowed in the runtime anyway.)
//
// 2. A pointer to a regular type (other than `unsafe.Pointer`) cannot be
// converted to a pointer to a not-in-heap type, even if they have the

	ENOTCAPABLE:     "Capabilities insufficient",
}

// Do the interface allocations only once for common
// Errno values.
var (
	errEAGAIN error = EAGAIN
	errEINVAL error = EINVAL
	errENOENT error = ENOENT
)

// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
//
// We set both noinline and nosplit to reduce code size, this function has many

	api "go.opentelemetry.io/otel/metric"

	"istio.io/istio/pkg/log"
)

type distribution struct {
	baseMetric
	d api.Float64Histogram
	// precomputedRecordOption is just a precomputation to avoid allocations on each record call
	precomputedRecordOption []api.RecordOption
}

var _ Metric = &distribution{}

func newDistribution(o options) *distribution {
	d, err := meter().Float64Histogram(o.name,

		}
	})

	t.Run("toBytes allocations", func(t *testing.T) {
		t.Parallel()

		s := utilrand.String(size)
		f := func() {
			b := toBytes(s)
			if len(b) != size {
				t.Errorf("invalid length: %d", len(b))
			}
		}
		allocs := testing.AllocsPerRun(100, f)
		if allocs > 0 {
			t.Errorf("expected zero allocations, got %v", allocs)
		}
	})

limitations under the License.
*/

package runtime

import (
	"sync"
)

// AllocatorPool simply stores Allocator objects to avoid additional memory allocations
// by caching created but unused items for later reuse, relieving pressure on the garbage collector.
//
// Usage:
//
//	memoryAllocator := runtime.AllocatorPool.Get().(*runtime.Allocator)

import (
	"context"

	api "go.opentelemetry.io/otel/metric"

	"istio.io/istio/pkg/log"
)

type counter struct {
	baseMetric
	c api.Float64Counter
	// precomputedAddOption is just a precomputation to avoid allocations on each record call
	precomputedAddOption []api.AddOption
}

var _ Metric = &counter{}

func newCounter(o options) *counter {
	c, err := meter().Float64Counter(o.name,
		api.WithDescription(o.description),

		},
		[]string{"cidr"},
	)
	// clusterIPAllocation counts the total number of ClusterIP allocation and allocation mode: static or dynamic.
	clusterIPAllocations = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "allocation_total",
			Help:           "Number of Cluster IPs allocations",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"cidr", "scope"},
	)

var (
	cidrSetAllocations = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      nodeIpamSubsystem,
			Name:           "cidrset_cidrs_allocations_total",
			Help:           "Counter measuring total number of CIDR allocations.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"clusterCIDR"},
	)
	cidrSetReleases = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      nodeIpamSubsystem,