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syscall_linux.go
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syscall_linux.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 syscallx
import "golang.org/x/sys/unix"
// PhysicalMemorySize returns the total physical memory size.
func PhysicalMemorySize() (uint64, error) {
var info unix.Sysinfo_t
if err := unix.Sysinfo(&info); err != nil {
return 0, err
}
return info.Totalram, nil
}
// FreeDiskSpace returns the free disk space for a given path.
func FreeDiskSpace(path string) (uint64, error) {
var stat unix.Statfs_t
if err := unix.Statfs(path, &stat); err != nil {
return 0, err
}
return stat.Bavail * uint64(stat.Bsize), nil
}
// SetProcessMemoryCeiling sets current and max process memory limit.
func SetProcessMemoryCeiling(softCeiling, hardCeiling uint64) error {
var rLimit unix.Rlimit
err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rLimit)
if err != nil {
return err
}
rLimit.Max = hardCeiling
rLimit.Cur = softCeiling
return unix.Setrlimit(unix.RLIMIT_NOFILE, &rLimit)
}