5c949d3b3b
Package fdtrack logs statistics about open file descriptors. This should help identify the source of #1549.
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// +build linux
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package fdtrack
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import (
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"io"
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"os"
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"syscall"
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)
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func fdlimit() int {
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var nofile syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &nofile); err != nil {
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return 0
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}
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return int(nofile.Cur)
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}
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func fdusage() (int, error) {
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f, err := os.Open("/proc/self/fd")
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if err != nil {
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return 0, err
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}
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defer f.Close()
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const batchSize = 100
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n := 0
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for {
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list, err := f.Readdirnames(batchSize)
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n += len(list)
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if err == io.EOF {
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break
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} else if err != nil {
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return 0, err
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}
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}
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return n, nil
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}
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