jdi@psuvax1.UUCP (John D. Irwin) (08/02/84)
He He. This reminds me of my experience. I brought up 2.9 about two weeks ago
(which was really fun considering we have no tape drive on our 11/34) and tried
to transfer a 7M hunk of source over from the vax to 2.9. Well, I didn't come
in the next day but found out later that in 23 hours it had done something like
2.9M -- ie: about 30 cps over a 9600 baud line.
Anyway, after cursing some I looked at the packet driver code and found this
little interesting piece in the packet get routine:
alarm(PKTIME);
for (nchars = 0; nchars < n; nchars += ret) {
ret = read(fn, b, n - nchars);
if (ret == 0) {
alarm(0);
return(-1);
}
PKASSERT(ret > 0, "PKCGET READ", "", ret);
b += ret;
sleep(1);
}
alarm(0);
return(0);
}
Isn't that cute? A one second sleep for every packet!
Well, I took out the sleep, but performance was still only 300 cps or so so I
just installed 4.2uucp which has worked fine since.
--
Spoken: John D. Irwin
AT&T: 814-237-5068
Nets: jdi@psuvax1.{BITNET,CSNET}
Uucp: {akgua, allegra, cornell, pitt, purdue, ihnp4, burdvax}!psuvax1!jdi