arch/netdev: try tcp timer in every txavail call
In the current implementation, the first transmission of the new
connection handshake is depends entirely by tcp_timer(), which will
caused 0.5s - 1s delay each time in connect().
This patch is mainly to improve the performance of TCP handshake.
Original:
nsh> tcp_client
[ 1.536100] TCP connect start.
[ 2.000200] TCP connect end. DIFF: tick: 4641, 464ms.
[ 3.000300] TCP connect start.
[ 4.000400] TCP connect end. DIFF: tick: 10001, 1000ms.
[ 5.000500] TCP connect start.
[ 6.000600] TCP connect end. DIFF: tick: 10001, 1000ms.
[ 7.000700] TCP connect start.
[ 8.000800] TCP connect end. DIFF: tick: 10001, 1000ms.
Optimized:
nsh> tcp_client
[ 3.263600] TCP connect start.
[ 3.263700] TCP connect end. DIFF: tick: 1, 0ms.
[ 4.263800] TCP connect start.
[ 4.263800] TCP connect end. DIFF: tick: 0, 0ms.
[ 5.263900] TCP connect start.
[ 5.263900] TCP connect end. DIFF: tick: 0, 0ms.
[ 6.264000] TCP connect start.
[ 6.264000] TCP connect end. DIFF: tick: 0, 0ms.
[ 7.264100] TCP connect start.
[ 7.264100] TCP connect end. DIFF: tick: 0, 0ms.
Signed-off-by: chao.an <anchao@xiaomi.com>
4a559807a5