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SubjectRe: VM tuning for Linux routers
Jan Kasprzak <> :
> I have a dual Athlon w/ 512M RAM and three NICs (one gigabit
> 3c985B running 802.1Q with 5 VLANs, two on-board 100Mbit 3c982). This box
> has almost nothing other to do apart from routing and packet filtering.
> Is there anything I can do to tell the VM system to use as much memory
> for network packets as possible?

In a sysctl fashion ? No.
However you can increase the length of the Rx/Tx rings on the 100Mb/s side
and tune the pci latency timers (depends on the hardware fifo size).

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