tree 1dd74f711db42a839259ebf494bb6e8f442e7bb0
parent 8ae4235f9454564dbb9f31cc827fccda5049e865
author Willy Tarreau <w@1wt.eu> 1543992985 +0100
committer Willy Tarreau <w@1wt.eu> 1544003862 +0100
encoding latin1

MINOR: htx: add buf_room_for_htx_data() to help optimize buffer transfers

The small HTX overhead is enough to make the system perform multiple
reads and unaligned memory copies. Here we provide a function whose
purpose is to reduce the apparent room in a buffer by the size of the
overhead for DATA blocks, which is the struct htx plus 2 blocks (one
for DATA, one for the end of message so that small blocks can fit at
once). The muxes using HTX will be encouraged to use this one instead
of b_room() to compute the available buffer room and avoid filling
their demux buf with more data than can fit at once into the HTX
buffer.