14852810b4
* cmd/utils: Add check on hard limit, skip test if below target * cmd/utils: Cross platform compatible fd limit test * cmd/utils: Remove syscall.Rlimit in test * cmd/utils: comment fd utility method
48 lines
1.8 KiB
Go
48 lines
1.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package utils
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import "errors"
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// raiseFdLimit tries to maximize the file descriptor allowance of this process
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// to the maximum hard-limit allowed by the OS.
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func raiseFdLimit(max uint64) error {
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// This method is NOP by design:
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// * Linux/Darwin counterparts need to manually increase per process limits
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// * On Windows Go uses the CreateFile API, which is limited to 16K files, non
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// changeable from within a running process
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// This way we can always "request" raising the limits, which will either have
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// or not have effect based on the platform we're running on.
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if max > 16384 {
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return errors.New("file descriptor limit (16384) reached")
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}
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return nil
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}
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// getFdLimit retrieves the number of file descriptors allowed to be opened by this
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// process.
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func getFdLimit() (int, error) {
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// Please see raiseFdLimit for the reason why we use hard coded 16K as the limit
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return 16384, nil
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}
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// getFdMaxLimit retrieves the maximum number of file descriptors this process is
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// allowed to request for itself.
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func getFdMaxLimit() (int, error) {
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return getFdLimit()
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}
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