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common/fdlimit: Move fdlimit files to separate package (#15850)

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* common/fdlimit: Move fdlimit files to separate package

When go-ethereum is used as a library the calling program need to set
the FD limit.

This commit extract fdlimit files to a separate package so it can be
used outside of go-ethereum.

* common/fdlimit: Remove FdLimit from functions signature

* common/fdlimit: Rename fdlimit functions
This commit is contained in:
Ricardo Domingos 2018-01-11 21:55:21 +01:00 committed by Péter Szilágyi
parent 023769d9d4
commit 56152b31ac
5 changed files with 31 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
cmd/utils/flags.go
View File

@ -31,6 +31,7 @@ import (
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/fdlimit"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/clique"
"github.com/ethereum/go-ethereum/consensus/ethash"
@ -721,10 +722,10 @@ func setIPC(ctx *cli.Context, cfg *node.Config) {
// makeDatabaseHandles raises out the number of allowed file handles per process
// for Geth and returns half of the allowance to assign to the database.
func makeDatabaseHandles() int {
if err := raiseFdLimit(2048); err != nil {
if err := fdlimit.Raise(2048); err != nil {
Fatalf("Failed to raise file descriptor allowance: %v", err)
}
limit, err := getFdLimit()
limit, err := fdlimit.Current()
if err != nil {
Fatalf("Failed to retrieve file descriptor allowance: %v", err)
}

14
cmd/utils/fdlimit_freebsd.go → common/fdlimit/fdlimit_freebsd.go
View File

@ -16,7 +16,7 @@
// +build freebsd
package utils
package fdlimit
import "syscall"
@ -24,9 +24,9 @@ import "syscall"
// but Rlimit fields have type int64 on FreeBSD so it needs
// an extra conversion.
// raiseFdLimit tries to maximize the file descriptor allowance of this process
// Raise tries to maximize the file descriptor allowance of this process
// to the maximum hard-limit allowed by the OS.
func raiseFdLimit(max uint64) error {
func Raise(max uint64) error {
// Get the current limit
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
@ -43,9 +43,9 @@ func raiseFdLimit(max uint64) error {
return nil
}
// getFdLimit retrieves the number of file descriptors allowed to be opened by this
// Current retrieves the number of file descriptors allowed to be opened by this
// process.
func getFdLimit() (int, error) {
func Current() (int, error) {
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
return 0, err
@ -53,9 +53,9 @@ func getFdLimit() (int, error) {
return int(limit.Cur), nil
}
// getFdMaxLimit retrieves the maximum number of file descriptors this process is
// Maximum retrieves the maximum number of file descriptors this process is
// allowed to request for itself.
func getFdMaxLimit() (int, error) {
func Maximum() (int, error) {
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
return 0, err

10
cmd/utils/fdlimit_test.go → common/fdlimit/fdlimit_test.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package utils
package fdlimit
import (
"fmt"
@ -25,7 +25,7 @@ import (
// per this process can be retrieved.
func TestFileDescriptorLimits(t *testing.T) {
target := 4096
hardlimit, err := getFdMaxLimit()
hardlimit, err := Maximum()
if err != nil {
t.Fatal(err)
}
@ -33,13 +33,13 @@ func TestFileDescriptorLimits(t *testing.T) {
t.Skip(fmt.Sprintf("system limit is less than desired test target: %d < %d", hardlimit, target))
}
if limit, err := getFdLimit(); err != nil || limit <= 0 {
if limit, err := Current(); err != nil || limit <= 0 {
t.Fatalf("failed to retrieve file descriptor limit (%d): %v", limit, err)
}
if err := raiseFdLimit(uint64(target)); err != nil {
if err := Raise(uint64(target)); err != nil {
t.Fatalf("failed to raise file allowance")
}
if limit, err := getFdLimit(); err != nil || limit < target {
if limit, err := Current(); err != nil || limit < target {
t.Fatalf("failed to retrieve raised descriptor limit (have %v, want %v): %v", limit, target, err)
}
}

14
cmd/utils/fdlimit_unix.go → common/fdlimit/fdlimit_unix.go
View File

@ -16,13 +16,13 @@
// +build linux darwin netbsd openbsd solaris
package utils
package fdlimit
import "syscall"
// raiseFdLimit tries to maximize the file descriptor allowance of this process
// Raise tries to maximize the file descriptor allowance of this process
// to the maximum hard-limit allowed by the OS.
func raiseFdLimit(max uint64) error {
func Raise(max uint64) error {
// Get the current limit
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
@ -39,9 +39,9 @@ func raiseFdLimit(max uint64) error {
return nil
}
// getFdLimit retrieves the number of file descriptors allowed to be opened by this
// Current retrieves the number of file descriptors allowed to be opened by this
// process.
func getFdLimit() (int, error) {
func Current() (int, error) {
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
return 0, err
@ -49,9 +49,9 @@ func getFdLimit() (int, error) {
return int(limit.Cur), nil
}
// getFdMaxLimit retrieves the maximum number of file descriptors this process is
// Maximum retrieves the maximum number of file descriptors this process is
// allowed to request for itself.
func getFdMaxLimit() (int, error) {
func Maximum() (int, error) {
var limit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
return 0, err

18
cmd/utils/fdlimit_windows.go → common/fdlimit/fdlimit_windows.go
View File

@ -14,13 +14,13 @@
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package utils
package fdlimit
import "errors"
// raiseFdLimit tries to maximize the file descriptor allowance of this process
// Raise tries to maximize the file descriptor allowance of this process
// to the maximum hard-limit allowed by the OS.
func raiseFdLimit(max uint64) error {
func Raise(max uint64) error {
// This method is NOP by design:
// * Linux/Darwin counterparts need to manually increase per process limits
// * On Windows Go uses the CreateFile API, which is limited to 16K files, non
@ -33,15 +33,15 @@ func raiseFdLimit(max uint64) error {
return nil
}
// getFdLimit retrieves the number of file descriptors allowed to be opened by this
// Current retrieves the number of file descriptors allowed to be opened by this
// process.
func getFdLimit() (int, error) {
// Please see raiseFdLimit for the reason why we use hard coded 16K as the limit
func Current() (int, error) {
// Please see Raise for the reason why we use hard coded 16K as the limit
return 16384, nil
}
// getFdMaxLimit retrieves the maximum number of file descriptors this process is
// Maximum retrieves the maximum number of file descriptors this process is
// allowed to request for itself.
func getFdMaxLimit() (int, error) {
return getFdLimit()
func Maximum() (int, error) {
return Current()
}