Re: HEADS-UP: IFLIB implementations of sys/dev/e1000 em, lem, igb pending

You can still explicitly set the number of descriptors. It is now reported under the dev sysctl tree. dev.<device>.<unit>.<value>

-M


 ---- On Wed, 11 Jan 2017 12:34:23 -0800 Olivier Cochard-Labbé <olivier_at_freebsd.org> wrote ---- 
 > 
 > On Wed, Jan 11, 2017 at 9:13 PM, Matthew Macy <mmacy_at_nextbsd.org> wrote:
 > 
 >   > Hmmm ... did your old tests do 4 or 8 queues on this hardware?
 >   >
 >   > Did the old tests run 1024 tx/rx slots or the max 4096?
 >  
 >  That's a great point, only having one thread per core could easily account for this. I'm hoping Sean can make txq != rxq work so that you can have 8txqs and 4 rxqs.
 >  
 > 
 > ​The netgate RCC-VE 4860 is a 4 cores atom C2558E, and I'm using 2 of the 4 Gigabit Intel i350 ports.
 > Lab detail:
 > https://bsdrp.net/documentation/examples/forwarding_performance_lab_of_a_netgate_rcc-ve_4860
 > 
 > My tunning are (same for both test):
 > hw.igb.rxd="2048" (it should be useless now)
 > hw.igb.txd="2048" (it should be useless now)
 > hw.em.rxd="2048"
 > hw.em.txd="2048"
 > hw.igb.rx_process_limit="-1" (It should be useless now too)
 > hw.em.rx_process_limit="-1"
 > 
 > dev.igb.2.fc=0
 > dev.igb.3.fc=0
 > 
 > I can generate profiling data for you: what kind of data do you want ?
 >