Performance improvements: tunes sysctl configuration and adds many tunnels per interface#19
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Performance improvements: tunes sysctl configuration and adds many tunnels per interface#19
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luiscape
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vproxtunnels are notably slow. In an experiment using iperf3, they produced the following results:vproxis ~4x slower for uploads and ~7x slower for downloads.Some overhead from encryption is expected when using WireGuard, particularly if the CPU is saturated with encryption or decryption operations. However, a difference this large is unacceptable.
With the changes in this PR, a
vproxinterface achieves the following throughput in the same experiment:Uploads reach 3.94 Gbps (80% of baseline) and downloads reach 4.30 Gbps (36% of baseline). This represents a 4x improvement in upload speed and a 2.5x improvement in download speed over the previous version. Both are currently bottlenecked by server CPU utilization — adding more resources will increase throughput further.
This is achieved through two improvements:
sysctlperformance tuning that configures the Linux kernel to use RX/TX queuesThe client now accepts a
--tunnels Nparameter, whereNis the number of tunnels to start. The client creates a dummy interface that routes traffic across all tunnels in round-robin fashion.Backwards compatibility is preserved when the parameter is omitted or when passing
--tunnels 1.