66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmdutil
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import (
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"fmt"
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"os"
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"runtime"
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"runtime/pprof"
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"runtime/trace"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/util/contract"
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)
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func InitProfiling(prefix string) error {
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cpu, err := os.Create(fmt.Sprintf("%s.%v.cpu", prefix, os.Getpid()))
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if err != nil {
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return errors.Wrap(err, "could not start CPU profile")
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}
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if err = pprof.StartCPUProfile(cpu); err != nil {
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return errors.Wrap(err, "could not start CPU profile")
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}
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exec, err := os.Create(fmt.Sprintf("%s.%v.trace", prefix, os.Getpid()))
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if err != nil {
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return errors.Wrap(err, "could not start execution trace")
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}
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if err = trace.Start(exec); err != nil {
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return errors.Wrap(err, "could not start execution trace")
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}
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return nil
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}
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func CloseProfiling(prefix string) error {
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pprof.StopCPUProfile()
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trace.Stop()
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mem, err := os.Create(fmt.Sprintf("%s.%v.mem", prefix, os.Getpid()))
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if err != nil {
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return errors.Wrap(err, "could not create memory profile")
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}
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defer contract.IgnoreClose(mem)
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runtime.GC() // get up-to-date statistics
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if err = pprof.WriteHeapProfile(mem); err != nil {
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return errors.Wrap(err, "could not write memory profile")
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}
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return nil
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}
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