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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package schedule | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
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| "github.com/pingcap/pd/server/core" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| // Limiter is a counter that limits the number of operators. | ||
| type Limiter struct { | ||
| sync.RWMutex | ||
| counts map[OperatorKind]map[uint64]uint64 | ||
| } | ||
|
|
||
| // NewLimiter creates a schedule limiter. | ||
| func NewLimiter() *Limiter { | ||
| return &Limiter{ | ||
| counts: make(map[OperatorKind]map[uint64]uint64), | ||
| } | ||
| } | ||
|
|
||
| // AddOperator increases the count by kind. | ||
| func (l *Limiter) AddOperator(op *Operator, region *core.RegionInfo) { | ||
| l.Lock() | ||
| defer l.Unlock() | ||
|
|
||
| if _, ok := l.counts[op.Kind()]; !ok { | ||
| l.counts[op.Kind()] = make(map[uint64]uint64) | ||
| } | ||
|
|
||
| for _, store := range op.InvolvedStores(region) { | ||
| l.counts[op.Kind()][store]++ | ||
| } | ||
| } | ||
|
|
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| // RemoveOperator decreases the count by kind. | ||
| func (l *Limiter) RemoveOperator(op *Operator) { | ||
| l.Lock() | ||
| defer l.Unlock() | ||
|
|
||
| for _, store := range op.InvolvedStores(nil) { | ||
| _, ok := l.counts[op.Kind()][store] | ||
| if ok { | ||
| if l.counts[op.Kind()][store] == 0 { | ||
| log.Fatal("the limiter is already 0, no operators need to remove") | ||
| } | ||
| l.counts[op.Kind()][store]-- | ||
| } else { | ||
| log.Fatalf("operator count decrease on nonexisted store %d", store) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // OperatorCount gets the max count of operators of all stores filtered by mask. | ||
| func (l *Limiter) OperatorCount(mask OperatorKind) uint64 { | ||
| l.RLock() | ||
| defer l.RUnlock() | ||
|
|
||
| var max uint64 | ||
| counts := make(map[uint64]uint64) | ||
| for k, stores := range l.counts { | ||
| if k&mask != 0 { | ||
| for storeID, count := range stores { | ||
| counts[storeID] += count | ||
| if max < counts[storeID] { | ||
| max = counts[storeID] | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return max | ||
| } | ||
|
|
||
| // StoreOperatorCount gets the count of operators for specific store filtered by mask. | ||
| func (l *Limiter) StoreOperatorCount(mask OperatorKind, storeID uint64) uint64 { | ||
| l.RLock() | ||
| defer l.RUnlock() | ||
|
|
||
| var total uint64 | ||
| for k, stores := range l.counts { | ||
| if k&mask != 0 { | ||
| if count, ok := stores[storeID]; ok { | ||
| total += count | ||
| } | ||
| } | ||
| } | ||
| return total | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package schedule | ||
|
|
||
| import ( | ||
| . "github.com/pingcap/check" | ||
| ) | ||
|
|
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| var _ = Suite(&testLimiterSuite{}) | ||
|
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| type testLimiterSuite struct{} | ||
|
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| func (s *testLimiterSuite) TestOperatorCount(c *C) { | ||
| l := NewLimiter() | ||
| c.Assert(l.OperatorCount(OpLeader), Equals, uint64(0)) | ||
| c.Assert(l.OperatorCount(OpRegion), Equals, uint64(0)) | ||
|
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| ops := []*Operator{} | ||
|
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| // init region and operator | ||
| for i := uint64(1); i <= 3; i++ { | ||
| op := newTestOperator(i, OpLeader|OpRegion, TransferLeader{FromStore: i + 1, ToStore: 1}) | ||
| region := newTestRegion(i, i+1, [2]uint64{1, 1}, [2]uint64{i + 1, i + 1}) | ||
| l.AddOperator(op, region) | ||
| ops = append(ops, op) | ||
| } | ||
|
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| c.Assert(l.OperatorCount(OpLeader), Equals, uint64(3)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 1), Equals, uint64(3)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 2), Equals, uint64(1)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 3), Equals, uint64(1)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 4), Equals, uint64(1)) | ||
|
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| l.RemoveOperator(ops[0]) | ||
| c.Assert(l.OperatorCount(OpLeader|OpRegion), Equals, uint64(2)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader|OpRegion, 1), Equals, uint64(2)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader|OpRegion, 2), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader|OpRegion, 3), Equals, uint64(1)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader|OpRegion, 4), Equals, uint64(1)) | ||
|
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| l.RemoveOperator(ops[1]) | ||
| c.Assert(l.OperatorCount(OpRegion), Equals, uint64(1)) | ||
| c.Assert(l.StoreOperatorCount(OpRegion, 1), Equals, uint64(1)) | ||
| c.Assert(l.StoreOperatorCount(OpRegion, 2), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpRegion, 3), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpRegion, 4), Equals, uint64(1)) | ||
|
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| l.RemoveOperator(ops[2]) | ||
| c.Assert(l.OperatorCount(OpLeader), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 1), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 2), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 3), Equals, uint64(0)) | ||
| c.Assert(l.StoreOperatorCount(OpLeader, 4), Equals, uint64(0)) | ||
| } |
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