On Wed, 9 Oct 2002, Attila Nagy wrote: With a dc ethernet card and ~45K packets per second, an XP1700 system went from > 50% interrupt to < 1%. I was astounded at the change!
If all it takes to get Gb interfaces polling is to send Luigi a card then he needs to send me his shipping address:) --- David > Hello, > > > You might want to try out some of the Intel gigabit boards. At least > > we've got an engineer from Intel who maintains the driver. > I'm far from being a FreeBSD expert, but Luigi Rizzo's polling patch > helped me a lot in similar cases to get better performance. > > >From POLLING(4): > DESCRIPTION > "Device polling" (polling for brevity) refers to a technique to handle > devices that does not rely on the latter to generate interrupts when they > need attention, but rather lets the CPU poll devices to service their > needs. This might seem inefficient and counterintuitive, but when done > properly, polling gives more control to the operating system on when and > how to handle devices, with a number of advantages in terms of system > responsivity and performance. > > AFAIK there are only two problems about that: > SUPPORTED DEVICES > Polling requires explicit modifications to the device drivers. As of > this writing, the dc, fxp, rl and sis devices are supported, with other > in the works. > > (no Gigabit cards) > > and > sys/kern/kern_poll.c: > [...] > #ifdef SMP > #include "opt_lint.h" > #ifndef COMPILING_LINT > #error DEVICE_POLLING is not compatible with SMP > #endif > #endif > [...] > > (no SMP support) > > As stated above, I'm not an expert, but my opinion is that polling would > be the best on the Gigabit cards (due to their capacity) and not the Fast > Ethernet ones. > > Maybe we could start sending GE hardware to Luigi :) > > ----------[ Free Software ISOs - http://www.fsn.hu/?f=download ]---------- > Attila Nagy e-mail: [EMAIL PROTECTED] > Free Software Network (FSN.HU) phone @work: +361 210 1415 (194) > cell.: +3630 306 6758 > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-hardware" in the body of the message > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
