change NumCtxSwitchesStat fields to int64

process.go

@@ -38,8 +38,8 @@ type IOCountersStat struct {
 }
 
 type NumCtxSwitchesStat struct {
-	Voluntary   int32 `json:"voluntary"`
+	Voluntary   int64 `json:"voluntary"`
-	Involuntary int32 `json:"involuntary"`
+	Involuntary int64 `json:"involuntary"`
 }
 
 func (p Process) String() string {

process_linux.go

@@ -430,17 +430,17 @@ func (p *Process) fillFromStatus() error {
 			}
 			p.numThreads = int32(v)
 		case "voluntary_ctxt_switches":
-			v, err := strconv.ParseInt(value, 10, 32)
+			v, err := strconv.ParseInt(value, 10, 64)
 			if err != nil {
 				return err
 			}
-			p.numCtxSwitches.Voluntary = int32(v)
+			p.numCtxSwitches.Voluntary = v
 		case "nonvoluntary_ctxt_switches":
-			v, err := strconv.ParseInt(value, 10, 32)
+			v, err := strconv.ParseInt(value, 10, 64)
 			if err != nil {
 				return err
 			}
-			p.numCtxSwitches.Involuntary = int32(v)
+			p.numCtxSwitches.Involuntary = v
 		}
 	}
 	return nil