chore: remove depend of gopsutil

component/memory/memory_linux.go

@@ -0,0 +1,37 @@
+package memory
+
+import (
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+var pageSize = uint64(os.Getpagesize())
+
+func GetMemoryInfo(pid int32) (*MemoryInfoStat, error) {
+	proc := os.Getenv("HOST_PROC")
+	if proc == "" {
+		proc = "/proc"
+	}
+	memPath := filepath.Join(proc, strconv.Itoa(int(pid)), "statm")
+	contents, err := os.ReadFile(memPath)
+	if err != nil {
+		return nil, err
+	}
+	fields := strings.Split(string(contents), " ")
+
+	vms, err := strconv.ParseUint(fields[0], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	rss, err := strconv.ParseUint(fields[1], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	memInfo := &MemoryInfoStat{
+		RSS: rss * pageSize,
+		VMS: vms * pageSize,
+	}
+	return memInfo, nil
+}