I ran both tests on the same uniprocessor system, so lock agenda should not be applicable, I think.
Also, the same test run on HPUX(stream based pipes) performs 2 times faster than streams based pipes on Linux. We all missing something, I guess. > Dave Grothe <[EMAIL PROTECTED]> wrote: >It has always been known (I think) that there is a huge difference in speed >between Linux native pipes and streams based pipes via LiS. > >I have seen similar results sending UDP datagrams through the Linux >loopback driver using native sockets vs the inet driver that Brian >publishes. I get about a 10:1 ratio between sockets and streams. > >Nothing has ever jumped out at me when I run oprofile during these tests -- >except lock contention. Which is what I am working on now. > >-- Dave > >At 11:58 AM 4/9/2004, Eugene LiS User wrote: > >>To exclude my module from the picture I have decided to compare >>data pumping rates for the pipe interface. >>I have googled pipespeed2 program, downloaded it and with a minor changes >>got it compiled in 2 versions with and without LiS. >> >>The results are as following: >> >># ./ps2 2000k 4k >>ps2 -x 1 2048000 4096 9.163 Seconds -- 915.493 MB/sec >> >># ./ps2lis 2000k 4k >>ps2lis -x 1 2048000 4096 45.602 Seconds -- 183.953 MB/sec >> >>Clearly there is some overhead in the LiS version of a pipe. >>[Hopefuly [for my module] that overhead is not only pipe related] >> >>Attached is a programm. >> >>Compiling with LiS: >> >> >># cc -I/usr/src/LiS/include -L /usr/src/LiS/libc -lLiS -o ps2lis pipespeed2.c >> >>Compiling without LiS: >> >># cc -o ps2 pipespeed2.c >> >> >> >> >> >>__________________________________________________________________ >>Introducing the New Netscape Internet Service. >>Only $9.95 a month -- Sign up today at http://isp.netscape.com/register >> >>Netscape. Just the Net You Need. >> >>New! Netscape Toolbar for Internet Explorer >>Search from anywhere on the Web and block those annoying pop-ups. >>Download now at http://channels.netscape.com/ns/search/install.jsp >> >> >> >>--- >>Incoming mail is certified Virus Free. >>Checked by AVG anti-virus system (http://www.grisoft.com). >>Version: 6.0.655 / Virus Database: 420 - Release Date: 4/8/2004 > > __________________________________________________________________ Introducing the New Netscape Internet Service. Only $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp _______________________________________________ Linux-streams mailing list [EMAIL PROTECTED] http://gsyc.escet.urjc.es/mailman/listinfo/linux-streams
