traceRelease(trace)
	}

	// If we sweep spanBudget spans without finding any free
	// space, just allocate a fresh span. This limits the amount
	// of time we can spend trying to find free space and
	// amortizes the cost of small object sweeping over the
	// benefit of having a full free span to allocate from. By
	// setting this to 100, we limit the space overhead to 1%.
	//

	}
	defer out.Close()

	// Try fallocate first.
	for {
		err = out.fallocate(1 << 10)
		if errors.Is(err, errors.ErrUnsupported) || err == errNoFallocate { // The underlying file system may not support fallocate
			t.Skip("fallocate is not supported")
		}
		if err == syscall.EINTR {
			continue // try again
		}
		if err != nil {
			t.Fatalf("fallocate failed: %v", err)
		}
		break
	}

	}
	return c.allocN(npages)
}

// allocN is a helper which attempts to allocate npages worth of pages
// from the cache. It represents the general case for allocating from
// the page cache.
//
// Returns a base address and the amount of scavenged memory in the
// allocated region in bytes.
func (c *pageCache) allocN(npages uintptr) (uintptr, uintptr) {
	i := findBitRange64(c.cache, uint(npages))

import (
	"errors"
	"fmt"
	"net"

	api "k8s.io/kubernetes/pkg/apis/core"
)

// Interface manages the allocation of IP addresses out of a range. Interface
// should be threadsafe.
type Interface interface {
	Allocate(net.IP) error
	AllocateNext() (net.IP, error)
	Release(net.IP) error
	ForEach(func(net.IP))
	CIDR() net.IPNet
	IPFamily() api.IPFamily
	Has(ip net.IP) bool
	Destroy()
	EnableMetrics()

 * Such work can reuse outputs from a previous execution.
 */
public interface MutableUnitOfWork extends UnitOfWork {
    /**
     * Returns the {@link MutableWorkspaceProvider} to allocate a workspace to execution this work in.
     */
    MutableWorkspaceProvider getWorkspaceProvider();

  }

  fun assertRequests(vararg expectedHosts: String?) {
    assertThat(requestedHosts).containsExactly(*expectedHosts)
    requestedHosts.clear()
  }

  /** Allocates and returns `count` fake IPv4 addresses like [255.0.0.100, 255.0.0.101].  */
  fun allocate(count: Int): List<InetAddress> {
    val from = nextAddress
    nextAddress += count
    return (from until nextAddress)
      .map {

 */
public interface ImmutableUnitOfWork extends UnitOfWork {
    /**
     * Returns the {@link ImmutableWorkspaceProvider} to allocate a workspace to execution this work in.
     */
    ImmutableWorkspaceProvider getWorkspaceProvider();

// to manage containers. For example, they contain functions to configure containers' cgroups,
// ensure containers run with the desired QoS, and allocate compute resources like cpus, memory,
// devices...

package runtime

import (
	"runtime"

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

// LogPanic logs the caller tree when a panic occurs.
func LogPanic(r any) {
	// Same as stdlib http server code. Manually allocate stack trace buffer size
	// to prevent excessively large logs
	const size = 64 << 10
	stacktrace := make([]byte, size)
	stacktrace = stacktrace[:runtime.Stack(stacktrace, false)]

// Malloc small size classes.
//
// See malloc.go for overview.
// See also mksizeclasses.go for how we decide what size classes to use.

package runtime

// Returns size of the memory block that mallocgc will allocate if you ask for the size,
// minus any inline space for metadata.
func roundupsize(size uintptr, noscan bool) (reqSize uintptr) {
	reqSize = size
	if reqSize <= maxSmallSize-mallocHeaderSize {
		// Small object.