tailscale/util/sysresources/memory_linux.go
Andrew Dunham 8d3acc9235 util/sysresources, magicsock: scale DERP buffer based on system memory
This adds the util/sysresources package, which currently only contains a
function to return the total memory size of the current system.

Then, we modify magicsock to scale the number of buffered DERP messages
based on the system's available memory, ensuring that we never use a
value lower than the previous constant of 32.

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ib763c877de4d0d4ee88869078e7d512f6a3a148d
2023-04-03 17:14:14 -04:00

20 lines
384 B
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build linux
package sysresources
import "golang.org/x/sys/unix"
func totalMemoryImpl() uint64 {
var info unix.Sysinfo_t
if err := unix.Sysinfo(&info); err != nil {
return 0
}
// uint64 casts are required since these might be uint32s
return uint64(info.Totalram) * uint64(info.Unit)
}