Larry McVoy wrote:
On Tue, Oct 02, 2007 at 11:01:47AM -0700, Rick Jones wrote:
has anyone already asked whether link-layer flow-control is enabled?
I doubt it, the same test works fine in one direction and poorly in the other.
Wouldn't the flow control squelch either way?
While I am often guilty of it, a wise old engineer tried to teach me that the
proper spelling is ass-u-me :) I wouldn't count on it hitting in both
directions, depends on the specifics of the situation.
WRT the HP-UX ACK avoidance heuristic, the default HP-UX socket buffer/window is
32768, and tcp_deferred_ack_max defaults to 22. That isn't really all that good
a combination - with a window of 32768 11 for the deferred ack would be better.
You could also go ahead and try it with a value of 2. Or, bump the window
size defaults - tcp_recv_hiwater_def and tcp_xmit_hiwater_def - to say 65535 or
128K or something - or use the setsockopt() calls to effect that.
rick jones
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