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

bugzilla-daemon at mindrot.org bugzilla-daemon at mindrot.org
Thu Feb 7 20:51:54 EST 2002


------- 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

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

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

More information about the openssh-unix-dev mailing list