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    Date
    SubjectRe: Network performance degradation from 2.6.11.12 to 2.6.16.20
    From
    From: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
    Date: Tue, 19 Sep 2006 02:00:38 +0400

    > * I do not undestand what the hell dhcp needs timestamps for.

    I can't even find a reference to SIOCGSTAMP in the
    dhcp-2.0pl5 or dhcp3-3.0.3 sources shipped in Ubuntu.

    But I will note that tpacket_rcv() expects to always get
    valid timestamps in the SKB, it does a:

    if (skb->tstamp.off_sec == 0) {
    __net_timestamp(skb);
    sock_enable_timestamp(sk);
    }

    so that it can fill in the h->tp_sec and h->tp_usec
    fields.
    -
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