mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-04 17:38:42 +00:00
86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
|
// 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 perfschema
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"github.com/juju/errors"
|
||
|
|
"github.com/pingcap/tidb/mysql"
|
||
|
|
"github.com/pingcap/tidb/util/types"
|
||
|
|
)
|
||
|
|
|
||
|
|
// EnumCallerName is used as a parameter to avoid calling runtime.Caller(1) since
|
||
|
|
// it is too expensive (500ns+ per call), we don't want to invoke it repeatedly for
|
||
|
|
// each instrument.
|
||
|
|
type EnumCallerName int
|
||
|
|
|
||
|
|
const (
|
||
|
|
// CallerNameSessionExecute is for session.go:Execute() method.
|
||
|
|
CallerNameSessionExecute EnumCallerName = iota + 1
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
stageInstrumentPrefix = "stage/"
|
||
|
|
statementInstrumentPrefix = "statement/"
|
||
|
|
transactionInstrumentPrefix = "transaction"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Flag indicators for table setup_timers.
|
||
|
|
const (
|
||
|
|
flagStage = iota + 1
|
||
|
|
flagStatement
|
||
|
|
flagTransaction
|
||
|
|
)
|
||
|
|
|
||
|
|
type enumTimerName int
|
||
|
|
|
||
|
|
// Enum values for the TIMER_NAME columns.
|
||
|
|
// This enum is found in the following tables:
|
||
|
|
// - performance_schema.setup_timer (TIMER_NAME)
|
||
|
|
const (
|
||
|
|
timerNameNone enumTimerName = iota
|
||
|
|
timerNameNanosec
|
||
|
|
timerNameMicrosec
|
||
|
|
timerNameMillisec
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
callerNames = make(map[EnumCallerName]string)
|
||
|
|
)
|
||
|
|
|
||
|
|
// addInstrument is used to add an item to setup_instruments table.
|
||
|
|
func (ps *perfSchema) addInstrument(name string) (uint64, error) {
|
||
|
|
record := types.MakeDatums(name, mysql.Enum{Name: "YES", Value: 1}, mysql.Enum{Name: "YES", Value: 1})
|
||
|
|
tbl := ps.mTables[TableSetupInstruments]
|
||
|
|
handle, err := tbl.AddRecord(nil, record)
|
||
|
|
return uint64(handle), errors.Trace(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (ps *perfSchema) getTimerName(flag int) (enumTimerName, error) {
|
||
|
|
if flag < 0 || flag >= len(setupTimersRecords) {
|
||
|
|
return timerNameNone, errors.Errorf("Unknown timerName flag %d", flag)
|
||
|
|
}
|
||
|
|
timerName := fmt.Sprintf("%s", setupTimersRecords[flag][1].GetString())
|
||
|
|
switch timerName {
|
||
|
|
case "NANOSECOND":
|
||
|
|
return timerNameNanosec, nil
|
||
|
|
case "MICROSECOND":
|
||
|
|
return timerNameMicrosec, nil
|
||
|
|
case "MILLISECOND":
|
||
|
|
return timerNameMillisec, nil
|
||
|
|
}
|
||
|
|
return timerNameNone, nil
|
||
|
|
}
|