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scheduler: pick vf by random #1953

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merged 1 commit into from
Mar 14, 2024
Merged

scheduler: pick vf by random #1953

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8 changes: 7 additions & 1 deletion pkg/scheduler/plugins/deviceshare/device_allocator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ package deviceshare

import (
"fmt"
"math/rand"
"sort"

corev1 "k8s.io/api/core/v1"
Expand All @@ -33,6 +34,10 @@ import (
"github.com/koordinator-sh/koordinator/pkg/util/bitmask"
)

var (
randIntnFn = rand.Intn
)

var deviceHandlers = map[schedulingv1alpha1.DeviceType]DeviceHandler{}
var deviceAllocators = map[schedulingv1alpha1.DeviceType]DeviceAllocator{}

Expand Down Expand Up @@ -476,10 +481,11 @@ func allocateVF(vfAllocation *VFAllocation, deviceInfos map[int]*schedulingv1alp
if len(remainingVFs) == 0 {
return nil
}
// Here we sort the remaining vf just for test deterministic. In fact, we pick the vf by random to alleviating some unexpected vf duplicate allocation problem due to uncoordinated scheduling and node-side vf allocation components
sort.Slice(remainingVFs, func(i, j int) bool {
return remainingVFs[i].BusID < remainingVFs[j].BusID
})
vf := &remainingVFs[0]
vf := &remainingVFs[randIntnFn(len(remainingVFs))]
return vf
}

Expand Down
6 changes: 6 additions & 0 deletions pkg/scheduler/plugins/deviceshare/device_allocator_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -866,6 +866,9 @@ func TestAutopilotAllocator(t *testing.T) {

for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
randIntnFn = func(n int) int {
return 0
}
deviceCR := tt.deviceCR.DeepCopy()
deviceCR.ResourceVersion = "1"
koordFakeClient := koordfake.NewSimpleClientset()
Expand Down Expand Up @@ -1703,6 +1706,9 @@ func TestAutopilotAllocatorWithExclusivePolicyAndRequiredScope(t *testing.T) {

for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
randIntnFn = func(n int) int {
return 0
}
deviceCR := tt.deviceCR.DeepCopy()
deviceCR.ResourceVersion = "1"
koordFakeClient := koordfake.NewSimpleClientset()
Expand Down
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