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total_memory_linux.go
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total_memory_linux.go
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// Copyright The OpenTelemetry Authors
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux
// +build linux
package iruntime // import "go.opentelemetry.io/collector/internal/iruntime"
import "go.opentelemetry.io/collector/internal/cgroups"
// unlimitedMemorySize defines the bytes size when memory limit is not set
// for the container and process with cgroups
const unlimitedMemorySize = 9223372036854771712
// TotalMemory returns total available memory.
// This implementation is meant for linux and uses cgroups to determine available memory.
func TotalMemory() (uint64, error) {
cgroups, err := cgroups.NewCGroupsForCurrentProcess()
if err != nil {
return 0, err
}
memoryQuota, defined, err := cgroups.MemoryQuota()
if err != nil || !defined {
return 0, err
}
if memoryQuota == unlimitedMemorySize {
totalMem, err := readMemInfo()
if err != nil {
return 0, err
}
return totalMem, nil
}
return uint64(memoryQuota), nil
}