Re: TSO and IPoIB performance degradation
From: Michael S. Tsirkin <hidden>
Date: 2006-03-10 00:38:57
Also in:
lkml
Possibly related (same subject, not in this thread)
- 2006-03-07 · Re: Re: TSO and IPoIB performance degradation · Shirley Ma <hidden>
- 2006-03-06 · Re: TSO and IPoIB performance degradation · Stephen Hemminger <hidden>
- 2006-03-06 · Re: TSO and IPoIB performance degradation · "David S. Miller" <davem@davemloft.net>
- 2006-03-06 · TSO and IPoIB performance degradation · Michael S. Tsirkin <hidden>
Quoting r. Michael S. Tsirkin [off-list ref]:
Or does __tcp_ack_snd_check delay until we have at least two full sized segments?
What I'm trying to say, since RFC 2525, 2.13 talks about "every second full-sized segment", so following the code from __tcp_ack_snd_check, why does it do /* More than one full frame received... */ if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss rather than /* At least two full frames received... */ if (((tp->rcv_nxt - tp->rcv_wup) >= 2 * inet_csk(sk)->icsk_ack.rcv_mss -- Michael S. Tsirkin Staff Engineer, Mellanox Technologies