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    SubjectRe: Very high bandwith packet based interface and performance problems
    On Wed, Feb 21, 2001 at 02:00:55PM -0800, Nye Liu wrote:
    > This is NOT what I'm seeing at all.. the kernel load appears to be
    > pegged at 100% (or very close to it), the user space app is getting
    > enough cpu time to read out about 10-20Mbit, and FURTHERMORE the kernel
    > appears to be ACKING ALL the traffic, which I don't understand at all
    > (e.g. the transmitter is simply blasting 300MBit of tcp unrestricted)
    > With udp, we can get the full 300MBit throughput, but only if we shape
    > the load to 300Mbit. If we increase the load past 300 MBit, the received
    > frames (at the user space udp app) drops to 10-20MBit, again due to
    > user-space application scheduling problems.

    Perhaps excess context switches are thrashing the system?
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