On 3/26/10 4:20 PM, Gary Gatten wrote: > Ok.... Whatever I've done SEEMS to be working, CPU is very low now > on both Tx and Rx. That said, I have almost no idea what code > changes are actually in place right now. I *think* it's a > combination of Gerrits' nanosleep stuff in delay.ccp, Client.cpp, > etc. - and the Conditional waits / usleep's in main.cpp, > Reporter.cpp, etc.
You could always diff your working source dir against a fresh copy of the 2.0.4 source... > I may wipe everything out and start over again with controlled tests > between each change. It would be nice if *all* the necessary patches > were integrated in one place - tarball, svn, etc. Have you considered just trying the 2.0.4-4 rpm? Since you're working on RHEL, that would seem the easiest, and you'd know exactly which code and patches are in use. http://download.fedora.redhat.com/pub/epel/5/i386/repoview/iperf.html > Any guidance on the proper / preferred method to address the high CPU > load with UDP issue would be great. I'd start with the rpm and see what you get. I'm also reading back through this and related threads, and just realizing that you were trying to test Linux <-> Windows. Which Windows iperf binary are you using? -tt > -----Original Message----- > From: Gary Gatten > Sent: Friday, March 26, 2010 1:01 PM > To: 'Tom Throckmorton' > Cc: 'iperf-users@lists.sourceforge.net' > Subject: RE: [Iperf-users] Gerrit Renker patch for high CPU > > The code in the svn/trunk dir SUX!!! CPU is maxed on both send and receive, > at least on RHEL5. Also, when starting the client with "-r" and then > aborting on the client (ctrl+c), the server side continues to transmit and > the report echo'd to stdio is not formatted. I think this is new behavior. > > I haven't tested it on FBSD or Solaris yet, but I need it to work on RHEL5 > so.... > > I'll keep reading, poking around, testing, etc... I really like this tool - > hope I can get it to work. > > G > > > > -----Original Message----- > From: Gary Gatten > Sent: Friday, March 26, 2010 10:19 AM > To: 'Tom Throckmorton' > Cc: 'iperf-users@lists.sourceforge.net' > Subject: RE: [Iperf-users] Gerrit Renker patch for high CPU > > Ah, I see! I had tweaked the code in Client.cpp myself, replacing > "delay_loop( 0 );" with "usleep ( 1000 ); > > This definitely fixed my high cpu load - it barely uses any now for 100Mb/s > streams. But, since I have almost no clue what I'm doing I'll integrate the > SVN source you pointed out! > > Thanks so much for your help! Once I get this "working" I can deploy it to > my HelpDesk staff and it will make my life a LITTLE tiny bit easier! > > G > > > -----Original Message----- > From: Tom Throckmorton [mailto:thr...@mcnc.org] > Sent: Thursday, March 25, 2010 8:56 PM > To: Gary Gatten > Cc: 'iperf-users@lists.sourceforge.net' > Subject: Re: [Iperf-users] Gerrit Renker patch for high CPU > > On 3/25/10 6:19 PM, Gary Gatten wrote: >> Hello all, >> >> I've searched and read numerous posts on "high cpu for udp" issue. >> Following a pretty long string I found and applied the "Ingo Molnar" >> patch and it seemed to have work when iperf is RECEIVING traffic. >> However, no love when it's sending traffic. >> >> So, I read some stuff that Gerrit Renker had a patch for the client >> side (Client.cpp?) ; doing away with gettimeofday() and delay_loop(). >> I can't find this patch anywhere! The link in this thread >> http://www.mail-archive.com/iperf-users@lists.sourceforge.net/msg00028.html >> doesn't work directly - and it appears to be the same location as the >> "Ingo Molnar" patch - which isn't what I need. > > Hi Gary, > > I believe Gerrit merged that patch shortly after that thread - see: > > http://iperf.svn.sourceforge.net/viewvc/iperf/trunk/ChangeLog?view=log > >> 2008-05-09 Gerrit Renker <gren...@users.sourceforge.net> >> >> * replace costly gettimeofday() with nanonsleep() See: >> https://sourceforge.net/tracker/index.php?func=detail&aid=1940009&group_id=128336&atid=711373 > > >> So, where is this magic patch? I fetched the latest SVN and it's the >> same as the 2.0.4 distro. > > You won't find it in the 2.0.4 tarball, only in trunk > > http://iperf.svn.sourceforge.net/viewvc/iperf?view=rev&revision=43 > >> I found one linux distro that has purportedly integrated these >> patches into their package called 2.0.4-4, but I have not reviewed >> that source yet... > > 2.0.4-4 in Fedora and EPEL do appear to contain the patches - see also: > > https://bugzilla.redhat.com/show_bug.cgi?id=506884 > > Cheers, > > -tt > -- Tom Throckmorton MCNC - Advanced Services Development 3021 Cornwallis Road Research Triangle Park, NC 27709 919.248.1448 "Connecting North Carolina's future today" ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
