| 1 | //go:build !windows |
| 2 | |
| 3 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 4 | |
| 5 | package ndexec |
| 6 | |
| 7 | import ( |
| 8 | "os" |
| 9 | "runtime" |
| 10 | "syscall" |
| 11 | "time" |
| 12 | ) |
| 13 | |
| 14 | // ResourceUsage captures OS-reported resource counters for a completed process. |
| 15 | type ResourceUsage struct { |
| 16 | User time.Duration |
| 17 | System time.Duration |
| 18 | MaxRSSBytes int64 |
| 19 | ReadBytes int64 |
| 20 | WriteBytes int64 |
| 21 | } |
| 22 | |
| 23 | func (u ResourceUsage) totalCPU() time.Duration { |
| 24 | return u.User + u.System |
| 25 | } |
| 26 | |
| 27 | func extractUsage(ps *os.ProcessState) ResourceUsage { |
| 28 | if ps == nil { |
| 29 | return ResourceUsage{} |
| 30 | } |
| 31 | usage := ResourceUsage{} |
| 32 | if sys := ps.SysUsage(); sys != nil { |
| 33 | if ru, ok := sys.(*syscall.Rusage); ok && ru != nil { |
| 34 | usage.User = time.Duration(ru.Utime.Sec)*time.Second + time.Duration(ru.Utime.Usec)*time.Microsecond |
| 35 | usage.System = time.Duration(ru.Stime.Sec)*time.Second + time.Duration(ru.Stime.Usec)*time.Microsecond |
| 36 | usage.MaxRSSBytes = convertMaxRSS(int64(ru.Maxrss)) |
| 37 | usage.ReadBytes = blocksToBytes(int64(ru.Inblock)) |
| 38 | usage.WriteBytes = blocksToBytes(int64(ru.Oublock)) |
| 39 | } |
| 40 | } |
| 41 | return usage |
| 42 | } |
| 43 | |
| 44 | // convertMaxRSS normalizes platform-specific MaxRSS units: Linux and BSD |
| 45 | // derivatives report KiB while Darwin already uses bytes. |
| 46 | func convertMaxRSS(raw int64) int64 { |
| 47 | bytes := raw |
| 48 | switch runtime.GOOS { |
| 49 | case "linux", "android", "freebsd", "openbsd", "netbsd", "dragonfly": |
| 50 | bytes *= 1024 |
| 51 | } |
| 52 | return bytes |
| 53 | } |
| 54 | |
| 55 | const blockSize = 512 |
| 56 | |
| 57 | func blocksToBytes(blocks int64) int64 { |
| 58 | if blocks <= 0 { |
| 59 | return 0 |
| 60 | } |
| 61 | return blocks * blockSize |
| 62 | } |