Date: 06 Nov 1998 19:29:38 +0100 From: finrod@ewox.org (Dag-Erling Coidan Smørgrav) To: committers@FreeBSD.ORG Subject: sendfile performance Message-ID: <86vhks4qul.fsf@niobe.ewox.org>
next in thread | raw e-mail | index | archive | help
Here are some numbers for sendfile performance on 100 Mbps Ethernet
(niobe and luna are connected back-to-back with a crossover cable):
finrod@niobe ~/src/sft$ ./tcpsendfile -1 luna 5400 /kernel -r100
count = 100
finrod@niobe ~/src/sft$ /usr/bin/ti./tcpsendfile -1 luna 5400 /kernel -r100
tic time tip
finrod@niobe ~/src/sft$ /usr/bin/time ./tcpsendfile -1 luna 5400 /kernel -r100
count = 100
20.51 real 0.04 user 1.09 sys
finrod@niobe ~/src/sft$ /usr/bin/time ./tcpsendfile -2 luna 5400 /kernel -r100
count = 2300
21.70 real 0.04 user 6.93 sys
finrod@niobe ~/src/sft$ /usr/bin/time ./tcpsendfile -1 luna 5400 /kernel -r100 -b8192
count = 18200
21.16 real 0.07 user 1.34 sys
finrod@niobe ~/src/sft$ /usr/bin/time ./tcpsendfile -2 luna 5400 /kernel -r100 -b8192
count = 18200
20.97 real 0.11 user 7.30 sys
finrod@niobe ~/src/sft$ /usr/bin/time ./tcpsendfile -1 luna 5400 /kernel -r100 -b1024
^C/usr/bin/time: command terminated abnormally
39.97 real 9.18 user 29.10 sys
I interrupted the last transfer because netstat showed absolutely no
activity on the wire. During the other tests I got a quite satisfying
throughput:
root@niobe /home/finrod# netstat -i 1
input (Total) output
packets errs bytes packets errs bytes colls
1774 0 107580 4964 0 7598766 0
1775 0 107520 4967 0 7591196 0
1777 0 107400 4973 0 7598766 0
1772 0 107580 4964 0 7603308 0
1776 0 107580 4973 0 7598766 0
1773 0 107640 4966 0 7601794 0
1778 0 107460 4974 0 7589998 0
In other words, the wire was maxed out.
Perhaps this discussion should be moved to -hackers?
DES
--
Dag-Erling Smørgrav - finrod@ewox.org
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?86vhks4qul.fsf>