/proc/loadavg basics

README.md

@@ -48,3 +48,9 @@ These are the parameters I'd like to show
 initially this will just output some rolling format. will have to think
 about something like a tui to properly place things for readability
 though
+
+
+## References
+
+- [/proc/loadavg](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/4/html/reference_guide/s2-proc-loadavg)
+

load/load.go

@@ -0,0 +1,78 @@
+package load
+
+import (
+ "log"
+ "os"
+ "strconv"
+ "strings"
+)
+
+type Load struct {
+ one float64
+ five float64
+ fifteen float64
+ proc_running int
+ proc_total int
+ lastpid int
+}
+
+type LA_CONST int
+
+const (
+ LA_ONEMIN LA_CONST = iota
+ LA_FIVEMIN
+ LA_FIFTEENMIN
+ LA_PROC_RUN // gotta remember LA_PROC_TOTAL is
+ // LA_PROC_TOTAL // This is actually not a sepaarte entry when parsing
+ LA_LASTPID
+)
+
+func GetLoadAvg() (*Load, error) {
+ f, err := os.ReadFile("/proc/loadavg")
+ if err != nil {
+ log.Fatal(err)
+ }
+ loadinfo := new(Load)
+ sp := strings.Split(strings.TrimSuffix(string(f), "\n"), " ")
+
+ // The running/total process entries are not space-delimited so parse those
+ // a little different
+ var i LA_CONST
+ for i = LA_ONEMIN; i <= LA_LASTPID+1; i++ {
+ switch i {
+ case LA_ONEMIN:
+ loadinfo.one, err = strconv.ParseFloat(sp[i], 64)
+ if err != nil {
+ return nil, err
+ }
+ case LA_FIVEMIN:
+ loadinfo.five, err = strconv.ParseFloat(sp[i], 64)
+ if err != nil {
+ return nil, err
+ }
+ case LA_FIFTEENMIN:
+ loadinfo.fifteen, err = strconv.ParseFloat(sp[i], 64)
+ if err != nil {
+ return nil, err
+ }
+ case LA_PROC_RUN:
+ // These are not space delimited but shown like X/Y in the loadavg file
+ procs := strings.Split(sp[i], "/")
+ loadinfo.proc_running, err = strconv.Atoi(procs[0])
+ if err != nil {
+ return nil, err
+ }
+ loadinfo.proc_total, err = strconv.Atoi(procs[1])
+ if err != nil {
+ return nil, err
+ }
+ case LA_LASTPID:
+ loadinfo.lastpid, err = strconv.Atoi(sp[i])
+ if err != nil {
+ return nil, err
+ }
+ }
+ }
+ return loadinfo, nil
+
+}

synopsys.go

@@ -5,6 +5,7 @@ import (
  "log"
 
  "github.com/bioe007/synopsys/cpu"
+ "github.com/bioe007/synopsys/load"
  "github.com/bioe007/synopsys/memory"
 )
 
@@ -17,4 +18,11 @@ func main() {
 
  cpuinf, err := cpu.GetCPUStats()
  fmt.Println("cpu struct ${##v}", cpuinf)
+
+ load, err := load.GetLoadAvg()
+ if err != nil {
+ log.Fatal("Load average failure", err)
+ }
+ fmt.Println("Load average stuff", load)
+
 }