• Gerrit Renker's avatar
    dccp: make implementation of Syn-RTT symmetric · 59b80802
    Gerrit Renker authored
    This patch is thanks to Andre Noll who reported the issue and helped testing.
    
    The Syn-RTT sampled during the initial handshake currently only works for
    the client sending the DCCP-Request. TFRC penalizes the absence of an RTT
    sample with a very slow initial speed (1 packet per second), which delays
    slow-start significantly, resulting in sluggish performance.
    
    This patch mirrors the "Syn RTT" principle by adding a timestamp also onto
    the DCCP-Response, producing an RTT sample  when the (Data)Ack completing
    the handshake arrives.
    
    Also changed the documentation to 'TFRC' since Syn RTTs are also used by CCID-4.
    Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    59b80802
options.c 15.2 KB