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// Copyright 2016 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 tikv
import (
"time"
. "github.com/pingcap/check"
"github.com/pingcap/kvproto/pkg/coprocessor"
"github.com/pingcap/tidb/config"
"github.com/pingcap/tidb/kv"
)
type testCoprocessorCacheSuite struct {
OneByOneSuite
}
var _ = Suite(&testCoprocessorCacheSuite{})
func (s *testCoprocessorSuite) TestBuildCacheKey(c *C) {
req := coprocessor.Request{
Tp: 0xAB,
StartTs: 0xAABBCC,
Data: []uint8{0x18, 0x0, 0x20, 0x0, 0x40, 0x0, 0x5a, 0x0},
Ranges: []*coprocessor.KeyRange{
{
Start: kv.Key{0x01},
End: kv.Key{0x01, 0x02},
},
{
Start: kv.Key{0x01, 0x01, 0x02},
End: kv.Key{0x01, 0x01, 0x03},
},
},
}
key, err := coprCacheBuildKey(&req)
c.Assert(err, IsNil)
expectKey := ""
expectKey += "\xab" // 1 byte Tp
expectKey += "\x08\x00\x00\x00" // 4 bytes Data len
expectKey += "\x18\x00\x20\x00\x40\x00\x5a\x00" // Data
expectKey += "\x01\x00" // 2 bytes StartKey len
expectKey += "\x01" // StartKey
expectKey += "\x02\x00" // 2 bytes EndKey len
expectKey += "\x01\x02" // EndKey
expectKey += "\x03\x00" // 2 bytes StartKey len
expectKey += "\x01\x01\x02" // StartKey
expectKey += "\x03\x00" // 2 bytes EndKey len
expectKey += "\x01\x01\x03" // EndKey
c.Assert(key, DeepEquals, []byte(expectKey))
req = coprocessor.Request{
Tp: 0xABCC, // Tp too big
StartTs: 0xAABBCC,
Data: []uint8{0x18},
Ranges: []*coprocessor.KeyRange{},
}
_, err = coprCacheBuildKey(&req)
c.Assert(err, NotNil)
}
func (s *testCoprocessorSuite) TestDisable(c *C) {
cache, err := newCoprCache(&config.CoprocessorCache{})
c.Assert(err, IsNil)
c.Assert(cache, IsNil)
v := cache.Set([]byte("foo"), &coprCacheValue{})
c.Assert(v, Equals, false)
v2 := cache.Get([]byte("foo"))
c.Assert(v2, IsNil)
v = cache.CheckResponseAdmission(1024, time.Second*5)
c.Assert(v, Equals, false)
cache, err = newCoprCache(&config.CoprocessorCache{Enable: true, CapacityMB: 0, AdmissionMaxResultMB: 1})
c.Assert(err, NotNil)
c.Assert(cache, IsNil)
cache, err = newCoprCache(&config.CoprocessorCache{Enable: true, CapacityMB: 0.001})
c.Assert(err, NotNil)
c.Assert(cache, IsNil)
cache, err = newCoprCache(&config.CoprocessorCache{Enable: true, CapacityMB: 0.001, AdmissionMaxResultMB: 1})
c.Assert(err, IsNil)
c.Assert(cache, NotNil)
}
func (s *testCoprocessorSuite) TestAdmission(c *C) {
cache, err := newCoprCache(&config.CoprocessorCache{Enable: true, AdmissionMinProcessMs: 5, AdmissionMaxResultMB: 1, CapacityMB: 1})
c.Assert(err, IsNil)
c.Assert(cache, NotNil)
v := cache.CheckRequestAdmission(0)
c.Assert(v, Equals, true)
v = cache.CheckRequestAdmission(1000)
c.Assert(v, Equals, true)
v = cache.CheckResponseAdmission(0, 0)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(0, 4*time.Millisecond)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(0, 5*time.Millisecond)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(1, 0)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(1, 4*time.Millisecond)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(1, 5*time.Millisecond)
c.Assert(v, Equals, true)
v = cache.CheckResponseAdmission(1024, 5*time.Millisecond)
c.Assert(v, Equals, true)
v = cache.CheckResponseAdmission(1024*1024, 5*time.Millisecond)
c.Assert(v, Equals, true)
v = cache.CheckResponseAdmission(1024*1024+1, 5*time.Millisecond)
c.Assert(v, Equals, false)
v = cache.CheckResponseAdmission(1024*1024+1, 4*time.Millisecond)
c.Assert(v, Equals, false)
cache, err = newCoprCache(&config.CoprocessorCache{Enable: true, AdmissionMaxRanges: 5, AdmissionMinProcessMs: 5, AdmissionMaxResultMB: 1, CapacityMB: 1})
c.Assert(err, IsNil)
c.Assert(cache, NotNil)
v = cache.CheckRequestAdmission(0)
c.Assert(v, Equals, true)
v = cache.CheckRequestAdmission(5)
c.Assert(v, Equals, true)
v = cache.CheckRequestAdmission(6)
c.Assert(v, Equals, false)
}
func (s *testCoprocessorSuite) TestCacheValueLen(c *C) {
v := coprCacheValue{
TimeStamp: 0x123,
RegionID: 0x1,
RegionDataVersion: 0x3,
}
// 72 = (8 byte pointer + 8 byte for length + 8 byte for cap) * 2 + 8 byte * 3
c.Assert(v.Len(), Equals, 72)
v = coprCacheValue{
Key: []byte("foobar"),
Data: []byte("12345678"),
TimeStamp: 0x123,
RegionID: 0x1,
RegionDataVersion: 0x3,
}
c.Assert(v.Len(), Equals, 72+6+8)
}
func (s *testCoprocessorSuite) TestGetSet(c *C) {
cache, err := newCoprCache(&config.CoprocessorCache{Enable: true, AdmissionMinProcessMs: 5, AdmissionMaxResultMB: 1, CapacityMB: 1})
c.Assert(err, IsNil)
c.Assert(cache, NotNil)
v := cache.Get([]byte("foo"))
c.Assert(v, IsNil)
v2 := cache.Set([]byte("foo"), &coprCacheValue{
Data: []byte("bar"),
TimeStamp: 0x123,
RegionID: 0x1,
RegionDataVersion: 0x3,
})
c.Assert(v2, Equals, true)
// See https://github.com/dgraph-io/ristretto/blob/83508260cb49a2c3261c2774c991870fd18b5a1b/cache_test.go#L13
// Changed from 10ms to 50ms to resist from unstable CI environment.
time.Sleep(time.Millisecond * 50)
v = cache.Get([]byte("foo"))
c.Assert(v, NotNil)
c.Assert(v.Data, DeepEquals, []byte("bar"))
}