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zeekay
7cf87b230b
The module already called itself github.com/luxfi/node while containing no node in Go: cmd/luxd was twenty-one lines that printed the size of a few types, and the Go column of the matrix measured a VM plugin. A repo that fetches the thing it claims to be has not replaced it, so the Go sources move in — 1515 files, the daemon and everything under it — and the build reaches outside this module for nothing. Rust and C++ sit beside it unchanged and are still measured against it by the differential. That is the point of one repo: the reference implementation and the two ports are the same checkout, so parity is a thing you can run rather than a thing you assert. Verified: builds, and the closure carries no lux-private — checked at build time rather than believed. The daemon starts twelve chains on a local network (P X C Q Z A B G K M F, plus D through its plugin) and reports healthy.
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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//go:build linux || netbsd || openbsd
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package ulimit
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import (
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"fmt"
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"syscall"
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"github.com/luxfi/log"
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)
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const DefaultFDLimit = 32 * 1024
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// Set attempts to bump the Rlimit which has a soft (Cur) and a hard (Max) value.
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// The soft limit is what is used by the kernel to report EMFILE errors. The hard
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// limit is a secondary limit which the process can be bumped to without additional
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// privileges. Bumping the Max limit further would require superuser privileges.
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// If the current Max is below our recommendation we will warn on start.
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// see: http://0pointer.net/blog/file-descriptor-limits.html
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func Set(limit uint64, log log.Logger) error {
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var rLimit syscall.Rlimit
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err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
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if err != nil {
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return fmt.Errorf("error getting rlimit: %w", err)
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}
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if limit > rLimit.Max {
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return fmt.Errorf("error fd-limit: (%d) greater than max: (%d)", limit, rLimit.Max)
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}
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rLimit.Cur = limit
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// set new limit
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if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
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return fmt.Errorf("error setting fd-limit: %w", err)
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}
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// verify limit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
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return fmt.Errorf("error getting rlimit: %w", err)
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}
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if rLimit.Cur < DefaultFDLimit {
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log.Warn("fd-limit is less than recommended and could result in reduced performance",
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"currentLimit", rLimit.Cur,
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"recommendedLimit", DefaultFDLimit,
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)
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}
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return nil
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}
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