Hi Aris,
I'm not sure if it's significant but the logs from the port forwarding
implementation show that the function 'channel_rcv_change_window' makes
changes to the window size but in the reverse port fowarding
implementation, changes to the window size are executed via the
'grow_window'
function.
- Gearoid
On 27/01/12 20:42, Aris Adamantiadis wrote:
Hi Gearoid,
It's possible that channel windows are not initialized the same way in
forward and reverse forwarding. This could result in bad performances
if the window is too small.
I'll check if I can find anything.
Aris
Le 27/01/12 18:16, Gearoid Murphy a écrit :
Hi,
We've been observing poor throughput (230KB/s) on libssh channels
generated from reverse port forwarding (ssh_forward_accept) via an
OpenSSH server.
Conversely, when using a channel generated through a normal port
forwarding call (ssh_channel_open_forward), we observe far greater
throughput (8MB/s).
Has anyone observed or experienced similar issues?, is there some
configuration aspect of the channel setup which needs to be modified?
libssh 0.5.2-1
Linux 3.0.0-15-generic x86_64 x86_64 x86_64 GNU/Linux
openssh-server 1:5.8p1
Thanks
- Gearoid
