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cmd/utils: max out the OS file allowance, don't cap to 2K
Backport: ethereum#18211
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| // Copyright 2016 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package fdlimit | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "testing" | ||
| ) | ||
|
|
||
| // TestFileDescriptorLimits simply tests whether the file descriptor allowance | ||
| // per this process can be retrieved. | ||
| func TestFileDescriptorLimits(t *testing.T) { | ||
| target := 4096 | ||
| hardlimit, err := Maximum() | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| if hardlimit < target { | ||
| t.Skip(fmt.Sprintf("system limit is less than desired test target: %d < %d", hardlimit, target)) | ||
| } | ||
|
|
||
| if limit, err := Current(); err != nil || limit <= 0 { | ||
| t.Fatalf("failed to retrieve file descriptor limit (%d): %v", limit, err) | ||
| } | ||
| if err := Raise(uint64(target)); err != nil { | ||
| t.Fatalf("failed to raise file allowance") | ||
| } | ||
| if limit, err := Current(); err != nil || limit < target { | ||
| t.Fatalf("failed to retrieve raised descriptor limit (have %v, want %v): %v", limit, target, err) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // Copyright 2016 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| // +build linux darwin netbsd openbsd solaris | ||
|
|
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| package fdlimit | ||
|
|
||
| import "syscall" | ||
|
|
||
| // Raise tries to maximize the file descriptor allowance of this process | ||
| // to the maximum hard-limit allowed by the OS. | ||
| func Raise(max uint64) error { | ||
| // Get the current limit | ||
| var limit syscall.Rlimit | ||
| if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil { | ||
| return err | ||
| } | ||
| // Try to update the limit to the max allowance | ||
| limit.Cur = limit.Max | ||
| if limit.Cur > max { | ||
| limit.Cur = max | ||
| } | ||
| if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Current retrieves the number of file descriptors allowed to be opened by this | ||
| // process. | ||
| func Current() (int, error) { | ||
| var limit syscall.Rlimit | ||
| if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil { | ||
| return 0, err | ||
| } | ||
| return int(limit.Cur), nil | ||
| } | ||
|
|
||
| // Maximum retrieves the maximum number of file descriptors this process is | ||
| // allowed to request for itself. | ||
| func Maximum() (int, error) { | ||
| var limit syscall.Rlimit | ||
| if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil { | ||
| return 0, err | ||
| } | ||
| return int(limit.Max), nil | ||
| } |
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