Documentation
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Overview ¶
Package optimize applies kernel/network tuning for high-throughput, low-latency tunnels. It is used by the "Optimize" menu item and applied automatically behind the Best Performance preset.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
func Apply ¶
Apply performs the full optimization with progress output. printf is used so the caller can pass a logging function (e.g. tui printer).
reserve is the set of ports this machine listens on and must keep: they are put in ip_local_reserved_ports so the kernel never hands one out as the source port of an outgoing connection. A port taken that way cannot be bound by the service that owns it, and nothing in the usual listener view shows why — see the note over ip_local_port_range above. Callers pass the tunnels' own ports; nil reserves nothing, which is the old behaviour.
func ApplyQuiet ¶
func ApplyQuiet(reserve []int)
ApplyQuiet runs Apply discarding output — used by the Best Performance flow.
func CleanRAM ¶
CleanRAM flushes system disk caches (drop_caches) and signals the Go runtime to release all unused memory back to the OS. Returns used memory before and after in MB.
func EngineStartupTuning ¶
func EngineStartupTuning() [][2]string
EngineStartupTuning returns the settings a starting tunnel applies, taken from the same table Optimize writes so the two can never disagree again.
func FullTuning ¶
func FullTuning() [][2]string
FullTuning returns everything Optimize applies, so a caller can be checked against it rather than against a second list written by hand.
func WasApplied ¶
func WasApplied() bool
WasApplied reports whether Optimize has ever run on this machine, by the one durable trace it leaves: the sysctl file it owns.
It exists so an update can repair what an older Optimize wrote without applying tuning to a machine that never asked for it. Installing a new version is not consent to have the kernel retuned; rewriting a file this program put there, to values this version believes in, is a different thing and is the only way a server set up before a fix ever receives it — nothing else rewrites that file, so the old values would otherwise outlive every update.
Types ¶
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Source Files