On 10/13/2009 08:35 AM, Jan Kiszka wrote:
It can be particularly slow if you use in-kernel irqchips and the default NIC emulation (up to 10 times slower), some effect I always wanted to understand on a rainy day. So, when you actually want -net user, try -no-kvm-irqchip.
This might be due to a missing SIGIO or SIGALRM; -no-kvm-irqchip generates a lot of extra signals and thus polling opportunities.
I see 300kB/sec from slirp; always assumed it was due to missing tcp features.
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