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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// 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 kernel
import (
"testing"
"gvisor.dev/gvisor/pkg/sentry/kernel/sched"
)
func TestTaskCPU(t *testing.T) {
for _, test := range []struct {
mask sched.CPUSet
tid ThreadID
cpu int32
}{
{
mask: []byte{0xff},
tid: 1,
cpu: 0,
},
{
mask: []byte{0xff},
tid: 10,
cpu: 1,
},
{
// more than 8 cpus.
mask: []byte{0xff, 0xff},
tid: 10,
cpu: 9,
},
{
// missing the first cpu.
mask: []byte{0xfe},
tid: 1,
cpu: 1,
},
{
mask: []byte{0xfe},
tid: 10,
cpu: 3,
},
{
// missing the fifth cpu.
mask: []byte{0xef},
tid: 10,
cpu: 2,
},
} {
assigned := assignCPU(test.mask, test.tid)
if test.cpu != assigned {
t.Errorf("assignCPU(%v, %v) got %v, want %v", test.mask, test.tid, assigned, test.cpu)
}
}
}
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