Hello! > Ordinarily, when I send 8MB in 16 byte block sizes, I get about 52 > Mb/s. However, if I exchange one 4 byte block over the connection (in > each direction) before I start timing the the 8MB transfer, it goes up > to about 57 Mb/s. (By "block size", I mean the size of the buffer > passed to write.) > > Does anyone have any idea how the initial small transfer can have such > large influence on overall throughput? In the second case initial exchange pushes TCP to mode when receiver sends much less ACKs. Actually, the difference is amusingly low, I would expect much larger difference. Alexey - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
