| // 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 |
| } |
| |
| 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) |
| } |