tree 20668275c66de31b5c1a7f696318df64075034c8
parent 3a16b2c9cd672f2f2b32f5dd267e0e22f02c18bc
author Willy Tarreau <w@1wt.eu> 1219909663 +0200
committer Willy Tarreau <w@1wt.eu> 1225617546 +0100
encoding latin1

[OPTIM] stream_sock_read must check for null-reads more often

With small HTTP messages, stream_sock_read() tends to wake the
task up for a message read without indicating that it may be
the last one. The reason is that level-triggered pollers generally
don't report HUP with data, but only afterwards, so stream_sock_read
has no chance to detect this condition and needs a respin.

So now we return on incomplete buffers only when the buffer is known
as a streamer, because here it generally makes sense. The net result
is that the number of calls in a single HTTP session has dropped
from 5 to 3, with one less wake up and several less calls to
stream_sock_data_update().