diff --git a/process/process_freebsd.go b/process/process_freebsd.go
index a5f0435..ecd8920 100644
--- a/process/process_freebsd.go
+++ b/process/process_freebsd.go
@@ -6,6 +6,8 @@ import (
 	"bytes"
 	"encoding/binary"
 	"unsafe"
+	"strings"
+	"syscall"
 
 	cpu "github.com/shirou/gopsutil/cpu"
 	"github.com/shirou/gopsutil/internal/common"
@@ -53,7 +55,19 @@ func (p *Process) Exe() (string, error) {
 	return "", common.NotImplementedError
 }
 func (p *Process) Cmdline() (string, error) {
-	return "", common.NotImplementedError
+	mib := []int32{CTLKern, KernProc, KernProcArgs, p.Pid}
+	buf, _, err := common.CallSyscall(mib)
+	if err != nil {
+		return "", err
+	}
+	ret := strings.FieldsFunc(string(buf), func(r rune) bool {
+		if r == '\u0000' {
+			return true
+		}
+		return false
+	})
+
+	return strings.Join(ret, " "), nil
 }
 func (p *Process) CreateTime() (int64, error) {
 	return 0, common.NotImplementedError
@@ -121,7 +135,14 @@ func (p *Process) Rlimit() ([]RlimitStat, error) {
 	return rlimit, common.NotImplementedError
 }
 func (p *Process) IOCounters() (*IOCountersStat, error) {
-	return nil, common.NotImplementedError
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+	return &IOCountersStat{
+		ReadCount:  uint64(k.KiRusage.Inblock),
+		WriteCount: uint64(k.KiRusage.Oublock),
+	}, nil
 }
 func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
 	return nil, common.NotImplementedError
@@ -142,7 +163,15 @@ func (p *Process) Threads() (map[string]string, error) {
 	return ret, common.NotImplementedError
 }
 func (p *Process) CPUTimes() (*cpu.CPUTimesStat, error) {
-	return nil, common.NotImplementedError
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+	return &cpu.CPUTimesStat{
+		CPU:    "cpu",
+		User:   float64(k.KiRusage.Utime.Sec) + float64(k.KiRusage.Utime.Usec)/1000000,
+		System: float64(k.KiRusage.Stime.Sec) + float64(k.KiRusage.Stime.Usec)/1000000,
+	}, nil
 }
 func (p *Process) CPUAffinity() ([]int32, error) {
 	return nil, common.NotImplementedError
@@ -152,13 +181,16 @@ func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
 	if err != nil {
 		return nil, err
 	}
-
-	ret := &MemoryInfoStat{
-		RSS: uint64(k.KiRssize),
-		VMS: uint64(k.KiSize),
+	v, err := syscall.Sysctl("vm.stats.vm.v_page_size")
+	if err != nil {
+		return nil, err
 	}
+	pageSize := binary.LittleEndian.Uint16([]byte(v))
 
-	return ret, nil
+	return &MemoryInfoStat{
+		RSS: uint64(k.KiRssize) * uint64(pageSize),
+		VMS: uint64(k.KiSize),
+	}, nil
 }
 func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
 	return nil, common.NotImplementedError
@@ -241,11 +273,7 @@ func parseKinfoProc(buf []byte) (KinfoProc, error) {
 	var k KinfoProc
 	br := bytes.NewReader(buf)
 	err := binary.Read(br, binary.LittleEndian, &k)
-	if err != nil {
-		return k, err
-	}
-
-	return k, nil
+	return k, err
 }
 
 func (p *Process) getKProc() (*KinfoProc, error) {
diff --git a/process/process_freebsd_386.go b/process/process_freebsd_386.go
index 4d9ebfd..6b3bdfc 100644
--- a/process/process_freebsd_386.go
+++ b/process/process_freebsd_386.go
@@ -10,8 +10,38 @@ const (
 	KernProcPID      = 1  // by process id
 	KernProcProc     = 8  // only return procs
 	KernProcPathname = 12 // path to executable
+	KernProcArgs     = 7  // get/set arguments/proctitle
 )
 
+type Timespec struct {
+	Sec  int32
+	Nsec int32
+}
+
+type Timeval struct {
+	Sec  int32
+	Usec int32
+}
+
+type Rusage struct {
+	Utime    Timeval
+	Stime    Timeval
+	Maxrss   int32
+	Ixrss    int32
+	Idrss    int32
+	Isrss    int32
+	Minflt   int32
+	Majflt   int32
+	Nswap    int32
+	Inblock  int32
+	Oublock  int32
+	Msgsnd   int32
+	Msgrcv   int32
+	Nsignals int32
+	Nvcsw    int32
+	Nivcsw   int32
+}
+
 // copied from sys/user.h
 type KinfoProc struct {
 	KiStructsize   int32
@@ -83,7 +113,7 @@ type KinfoProc struct {
 	KiNumthreads   int32
 	KiTid          int32
 	KiPri          int32
-	KiRusage       [72]byte
+	KiRusage       Rusage
 	KiRusageCh     [72]byte
 	KiPcb          int32
 	KiKstack       int32
diff --git a/process/process_freebsd_amd64.go b/process/process_freebsd_amd64.go
index 0dafda2..69a352f 100644
--- a/process/process_freebsd_amd64.go
+++ b/process/process_freebsd_amd64.go
@@ -1,6 +1,5 @@
 // +build freebsd
 // +build amd64
-
 package process
 
 // copied from sys/sysctl.h
@@ -10,8 +9,38 @@ const (
 	KernProcPID      = 1  // by process id
 	KernProcProc     = 8  // only return procs
 	KernProcPathname = 12 // path to executable
+	KernProcArgs     = 7  // get/set arguments/proctitle
 )
 
+type Timespec struct {
+	Sec  int64
+	Nsec int64
+}
+
+type Timeval struct {
+	Sec  int64
+	Usec int64
+}
+
+type Rusage struct {
+	Utime    Timeval
+	Stime    Timeval
+	Maxrss   int64
+	Ixrss    int64
+	Idrss    int64
+	Isrss    int64
+	Minflt   int64
+	Majflt   int64
+	Nswap    int64
+	Inblock  int64
+	Oublock  int64
+	Msgsnd   int64
+	Msgrcv   int64
+	Nsignals int64
+	Nvcsw    int64
+	Nivcsw   int64
+}
+
 // copied from sys/user.h
 type KinfoProc struct {
 	KiStructsize   int32
@@ -83,7 +112,7 @@ type KinfoProc struct {
 	KiNumthreads   int32
 	KiTid          int32
 	KiPri          int32
-	KiRusage       [144]byte
+	KiRusage       Rusage
 	KiRusageCh     [144]byte
 	KiPcb          int64
 	KiKstack       int64