On Thu, 2009-03-05 at 16:44 -0800, Ezra Taylor wrote: > Hello again: > Could you confirm that setting DEFAULT_ITR to 0 will > disable Interrupt Throttling. Do I have to set MAX_ITR and MIN_ITR to 0. > Also, are there any other files I have to edit? I won't bother you guys > anymore tonight.
It might be good to know that, with 2.6 kernels, you shouldn't have to edit the driver to change parameter values, even when statically linking. You can specify any module parameter for a statically linked driver prefixed with <driver>. So you could set ITR to 0 by adding "e1000.InterruptThrottleRate=0" to the kernel command line in your grub config. - Chris > /* Interrupt Throttle Rate (interrupts/sec) > * > * Valid Range: 100-100000 (0=off, 1=dynamic, 3=dynamic conservative) > */ > E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate"); > #define DEFAULT_ITR 3 > #define MAX_ITR 100000 > #define MIN_ITR 100 > > > > > > > > > On Thu, Mar 5, 2009 at 7:12 PM, Tantilov, Emil S > <[email protected]>wrote: > > > If your change is correct you will see a high number of interrupts/sec (for > > example when measured with netperf using the RR tests or when transmitting > > small packets). With interrupt throttling enabled your int/sec will be > > capped at either 8k or 20k int/sec (depending on the version of e1000 you're > > using). > > > > Also on a newer version e1000 you can use ethtool to change ITR on a fly > > using ethtool -c/C to check/modify the rx-usecs parameter. > > > > For example to cap int/sec at 8k: > > ethtool -C rx-usecs 125 > > > > (100000/125 = 8000) > > > > Thanks, > > Emil > > > > -----Original Message----- > > From: Ezra Taylor [mailto:[email protected]] > > Sent: Thursday, March 05, 2009 3:51 PM > > To: [email protected] > > Subject: [E1000-devel] compiling the e1000 driver statically. > > > > Hello all: > > First, I would like to apologize if this is the wrong place to > > ask this question. Here it goes. We are running Kernels with drivers we > > only need. The driver are compiled statically into the Linux Kernel. I > > was > > told recently to disable interrupt throttling to test its impact on our > > systems. The file I edited was _param.c. After editing this file, I > > recompiled the Kernel with no known issues. How can I tell that the change > > I made took affect? I would like to thank you guys for your hard work and > > your help. > > > > -- > > Ezra Taylor > > > > > ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel
