[Bug 105] scp protocol 2 over a hippi interface takes 6 times longer

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=105





------- Additional Comments From pas50 at cam.ac.uk  2002-02-07 20:51 -------
time `cat lapack.ibm.tar.gz | ssh -1 -c 3des hodgkin 'cat > f' `
10.6u 0.6s 0:24 45% 954+790k 0+0io 0pf+0w

time `cat lapack.ibm.tar.gz | ssh -2 -c 3des-cbc hodgkin  'cat > f2' `
8.9u 0.7s 2:40 6% 929+631k 0+0io 0pf+0w

My colleague has done some investigating and has found something up with select.

"I have added some diagnostics to
packet.c and clientloop.c.  It is clear that the slow select calls
are not working properly - in particular, they are returning after
about 0.2 seconds WITHOUT having set a descriptor.  Subsequent
calls work.  It seems to be input from the connexion that is the
problem.

I suspect a failure to communicate from the HiPPI driver, which
then triggers a timeout."



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