On 2016-01-26 21:40, Lars Nordin wrote:
On 2016-01-26 20:37, Daniel Stenberg wrote:
On Tue, 26 Jan 2016, Lars Nordin wrote:
Have I missed any setting? I know local_echo is an option, but if
SecureCRT can, why not libssh2?
Could it be as easy as setsockopt(... TCP_NODELAY ...) ?
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I added the line, but no change...I'm on Windows and tried both the
ioctlsocket(... FIONBIO ... and now the setsockopt(... TCP_NODELAY ...)
u_long flags = 1;
//ioctlsocket(sock, FIONBIO, &flags); // tried both with and
without
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *) &flags,
sizeof (u_long));
Using my automatic character-sender I discovered a pattern, the ACK is
sent after 14 packetets, ie 7 characters sent and received. The delay
is 100ms (as programmed) between each sent characters (with a reply in
less then 10ms) until the ACK , the ACK is sent efter 200ms delay and
then the next character after 100ms more. Summary 200ms of extra delay
each 7 characters sent.
/Lars
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I added code to print the clock() before and after the call to libssh2
and discovered that it's the libssh2_write() function that sometime
takes extre time to complete:
write<: clock (ms) = 2042
write>: clock (ms) = 2042
read <: clock (ms) = 2042
read >: clock (ms) = 2042
write<: clock (ms) = 2143
write>: clock (ms) = 2143
read <: clock (ms) = 2143
read >: clock (ms) = 2143
write<: clock (ms) = 2243
write>: clock (ms) = 2448
Above explained, the 'write <' is before the call to write and 'write >'
is after the call. I have a 100ms delay between each write() and the
function is not using any time until the last one . Checking all of the
output it's repeated each 7 write.
I dig inte the libssh2_write() tomorrow!
/Lars
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