diff --git a/Gopkg.lock b/Gopkg.lock
index ca6cf37e8..b1f1cdd2a 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -47,6 +47,22 @@
   revision = "004e3cb72213e5e727e4e08f668ee6c8f27e5d32"
   version = "v1.6.0"
 
+[[projects]]
+  digest = "1:e035e4d40c874efd615392213909ddc439962eba6c7c41647c451fc00e6291db"
+  name = "github.com/tklauser/go-sysconf"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "a472c82464a74762b54d10f621b0d1f7ec50933e"
+  version = "v0.3.3"
+
+[[projects]]
+  digest = "1:e7bf47a37e6d0fb2f4bd0f65f574f8a92922f048cab3f106b0a7a413cbb14714"
+  name = "github.com/tklauser/numcpus"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "c03481b99a3f0b56b010e938559fddce19d3cf53"
+  version = "v0.1.0"
+
 [[projects]]
   branch = "master"
   digest = "1:0afe79d034c63eea8c5977401f5fc135394751c1213ee6c991b0c6bec44f8f60"
@@ -76,6 +92,7 @@
     "github.com/StackExchange/wmi",
     "github.com/stretchr/testify/assert",
     "github.com/stretchr/testify/require",
+    "github.com/tklauser/go-sysconf",
     "golang.org/x/sys/unix",
     "golang.org/x/sys/windows",
     "golang.org/x/sys/windows/svc",
diff --git a/Gopkg.toml b/Gopkg.toml
index bf5784539..e8576d846 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -33,6 +33,10 @@
   name = "github.com/stretchr/testify"
   version = "1.2.2"
 
+[[constraint]]
+  name = "github.com/tklauser/go-sysconf"
+  version = "0.3.3"
+
 [[constraint]]
   branch = "master"
   name = "golang.org/x/sys"
diff --git a/cpu/cpu_darwin.go b/cpu/cpu_darwin.go
index 3d3455ee6..421f1e16b 100644
--- a/cpu/cpu_darwin.go
+++ b/cpu/cpu_darwin.go
@@ -4,10 +4,10 @@ package cpu
 
 import (
 	"context"
-	"os/exec"
 	"strconv"
 	"strings"
 
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -25,17 +25,10 @@ const (
 var ClocksPerSec = float64(128)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/cpu/cpu_dragonfly.go b/cpu/cpu_dragonfly.go
index eed5beab7..45094df1d 100644
--- a/cpu/cpu_dragonfly.go
+++ b/cpu/cpu_dragonfly.go
@@ -3,7 +3,6 @@ package cpu
 import (
 	"context"
 	"fmt"
-	"os/exec"
 	"reflect"
 	"regexp"
 	"runtime"
@@ -12,6 +11,7 @@ import (
 	"unsafe"
 
 	"github.com/shirou/gopsutil/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -25,17 +25,10 @@ var cpuTimesSize int
 var emptyTimes cpuTimes
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/cpu/cpu_freebsd.go b/cpu/cpu_freebsd.go
index 57beffae1..24527af20 100644
--- a/cpu/cpu_freebsd.go
+++ b/cpu/cpu_freebsd.go
@@ -3,7 +3,6 @@ package cpu
 import (
 	"context"
 	"fmt"
-	"os/exec"
 	"reflect"
 	"regexp"
 	"runtime"
@@ -12,6 +11,7 @@ import (
 	"unsafe"
 
 	"github.com/shirou/gopsutil/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -26,17 +26,10 @@ var cpuTimesSize int
 var emptyTimes cpuTimes
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/cpu/cpu_linux.go b/cpu/cpu_linux.go
index f5adae706..b7040c7ea 100644
--- a/cpu/cpu_linux.go
+++ b/cpu/cpu_linux.go
@@ -6,28 +6,21 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"os/exec"
 	"path/filepath"
 	"strconv"
 	"strings"
 
 	"github.com/shirou/gopsutil/internal/common"
+	"github.com/tklauser/go-sysconf"
 )
 
 var ClocksPerSec = float64(100)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.CommandWithContext(context.Background(), getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = i
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/cpu/cpu_openbsd.go b/cpu/cpu_openbsd.go
index b54cf9ca6..c761aa21d 100644
--- a/cpu/cpu_openbsd.go
+++ b/cpu/cpu_openbsd.go
@@ -7,13 +7,13 @@ import (
 	"context"
 	"encoding/binary"
 	"fmt"
-	"os/exec"
 	"runtime"
 	"strconv"
 	"strings"
 	"syscall"
 
 	"github.com/shirou/gopsutil/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -39,20 +39,12 @@ const (
 var ClocksPerSec = float64(128)
 
 func init() {
-	func() {
-		getconf, err := exec.LookPath("getconf")
-		if err != nil {
-			return
-		}
-		out, err := invoke.Command(getconf, "CLK_TCK")
-		// ignore errors
-		if err == nil {
-			i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-			if err == nil {
-				ClocksPerSec = float64(i)
-			}
-		}
-	}()
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
+	// ignore errors
+	if err == nil {
+		ClocksPerSec = float64(clkTck)
+	}
+
 	func() {
 		v, err := unix.Sysctl("kern.osrelease") // can't reuse host.PlatformInformation because of circular import
 		if err != nil {
diff --git a/cpu/cpu_solaris.go b/cpu/cpu_solaris.go
index 3de098424..d97688d4a 100644
--- a/cpu/cpu_solaris.go
+++ b/cpu/cpu_solaris.go
@@ -10,22 +10,17 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+
+	"github.com/tklauser/go-sysconf"
 )
 
 var ClocksPerSec = float64(128)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/cpu/cpu_darwin.go b/v3/cpu/cpu_darwin.go
index 73151b40f..4c81e1bd8 100644
--- a/v3/cpu/cpu_darwin.go
+++ b/v3/cpu/cpu_darwin.go
@@ -4,10 +4,10 @@ package cpu
 
 import (
 	"context"
-	"os/exec"
 	"strconv"
 	"strings"
 
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -25,17 +25,10 @@ const (
 var ClocksPerSec = float64(128)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/cpu/cpu_dragonfly.go b/v3/cpu/cpu_dragonfly.go
index ed6488933..a9c81cc5d 100644
--- a/v3/cpu/cpu_dragonfly.go
+++ b/v3/cpu/cpu_dragonfly.go
@@ -3,7 +3,6 @@ package cpu
 import (
 	"context"
 	"fmt"
-	"os/exec"
 	"reflect"
 	"regexp"
 	"runtime"
@@ -12,6 +11,7 @@ import (
 	"unsafe"
 
 	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -25,17 +25,10 @@ var cpuTimesSize int
 var emptyTimes cpuTimes
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/cpu/cpu_freebsd.go b/v3/cpu/cpu_freebsd.go
index d0ec8345e..3b83cf315 100644
--- a/v3/cpu/cpu_freebsd.go
+++ b/v3/cpu/cpu_freebsd.go
@@ -3,7 +3,6 @@ package cpu
 import (
 	"context"
 	"fmt"
-	"os/exec"
 	"reflect"
 	"regexp"
 	"runtime"
@@ -12,6 +11,7 @@ import (
 	"unsafe"
 
 	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -26,17 +26,10 @@ var cpuTimesSize int
 var emptyTimes cpuTimes
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/cpu/cpu_linux.go b/v3/cpu/cpu_linux.go
index c845aa2f8..fb0b72fa4 100644
--- a/v3/cpu/cpu_linux.go
+++ b/v3/cpu/cpu_linux.go
@@ -6,28 +6,21 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"os/exec"
 	"path/filepath"
 	"strconv"
 	"strings"
 
 	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/tklauser/go-sysconf"
 )
 
 var ClocksPerSec = float64(100)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.CommandWithContext(context.Background(), getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = i
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/cpu/cpu_openbsd.go b/v3/cpu/cpu_openbsd.go
index cfe046740..8eb28db72 100644
--- a/v3/cpu/cpu_openbsd.go
+++ b/v3/cpu/cpu_openbsd.go
@@ -7,13 +7,13 @@ import (
 	"context"
 	"encoding/binary"
 	"fmt"
-	"os/exec"
 	"runtime"
 	"strconv"
 	"strings"
 	"syscall"
 
 	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )
 
@@ -39,20 +39,12 @@ const (
 var ClocksPerSec = float64(128)
 
 func init() {
-	func() {
-		getconf, err := exec.LookPath("getconf")
-		if err != nil {
-			return
-		}
-		out, err := invoke.Command(getconf, "CLK_TCK")
-		// ignore errors
-		if err == nil {
-			i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-			if err == nil {
-				ClocksPerSec = float64(i)
-			}
-		}
-	}()
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
+	// ignore errors
+	if err == nil {
+		ClocksPerSec = float64(clkTck)
+	}
+
 	func() {
 		v, err := unix.Sysctl("kern.osrelease") // can't reuse host.PlatformInformation because of circular import
 		if err != nil {
diff --git a/v3/cpu/cpu_solaris.go b/v3/cpu/cpu_solaris.go
index 3de098424..d97688d4a 100644
--- a/v3/cpu/cpu_solaris.go
+++ b/v3/cpu/cpu_solaris.go
@@ -10,22 +10,17 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+
+	"github.com/tklauser/go-sysconf"
 )
 
 var ClocksPerSec = float64(128)
 
 func init() {
-	getconf, err := exec.LookPath("getconf")
-	if err != nil {
-		return
-	}
-	out, err := invoke.Command(getconf, "CLK_TCK")
+	clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	// ignore errors
 	if err == nil {
-		i, err := strconv.ParseFloat(strings.TrimSpace(string(out)), 64)
-		if err == nil {
-			ClocksPerSec = float64(i)
-		}
+		ClocksPerSec = float64(clkTck)
 	}
 }
 
diff --git a/v3/go.mod b/v3/go.mod
index 301154bd8..9141c4493 100644
--- a/v3/go.mod
+++ b/v3/go.mod
@@ -6,5 +6,6 @@ require (
 	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/stretchr/testify v1.6.1
-	golang.org/x/sys v0.0.0-20201024232916-9f70ab9862d5
+	github.com/tklauser/go-sysconf v0.3.3
+	golang.org/x/sys v0.0.0-20210112091331-59c308dcf3cc
 )
diff --git a/v3/go.sum b/v3/go.sum
index d4f32764e..392798d40 100644
--- a/v3/go.sum
+++ b/v3/go.sum
@@ -9,8 +9,13 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-golang.org/x/sys v0.0.0-20201024232916-9f70ab9862d5 h1:iCaAy5bMeEvwANu3YnJfWwI0kWAGkEa2RXPdweI/ysk=
-golang.org/x/sys v0.0.0-20201024232916-9f70ab9862d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+github.com/tklauser/go-sysconf v0.3.3 h1:WG0jlmt60utBvS+NTgja4vgqJ7QG12AVXhWQHaaDJog=
+github.com/tklauser/go-sysconf v0.3.3/go.mod h1:QEKfliuzZuKIQZPhBJtVd0Z9fqtb2OYmIEwWeRltn2s=
+github.com/tklauser/numcpus v0.2.0 h1:Y+tTPBtO2xyXRQKX1XUYjZu4jbNzvDugwDIz4EYSpB4=
+github.com/tklauser/numcpus v0.2.0/go.mod h1:i3up9VjARpkV00NkBbexuDd0RAVQz4rV5Gl8miYgd5k=
+golang.org/x/sys v0.0.0-20210112091331-59c308dcf3cc h1:y0Og6AYdwus7SIAnKnDxjc4gJetRiYEWOx4AKbOeyEI=
+golang.org/x/sys v0.0.0-20210112091331-59c308dcf3cc/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=