gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/tcpip/stack/gro/gro_test.go (about)

     1  // Copyright 2022 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gro
    16  
    17  import (
    18  	"math/bits"
    19  	"testing"
    20  )
    21  
    22  func TestNBuckets(t *testing.T) {
    23  	// groNBuckets must be a power of 2 so that we can use groNBuckets-1 as
    24  	// a mask when indexing into the list of buckets.
    25  	if bits.OnesCount(groNBuckets) != 1 {
    26  		t.Fatalf("groNBuckets is not a power of two")
    27  	}
    28  }