Re: em(4) high latency w/o msix

2011-10-04 Thread Hooman Fazaeli
8.2-RELEASE and stable/8 have the same problem. Ping RTT triples when MSIX is disabled. On 10/3/2011 11:50 AM, Jack Vogel wrote: Can you try the driver in 8.2 and possibly stable/8 to see the behavior there. And, just curious, why are you disabling MSIX? Jack On Mon, Oct 3, 2011 at 12:51 AM

Re: em(4) high latency w/o msix

2011-10-03 Thread Sami Halabi
Hi, Sorry for the questuion. what are the benefits of MSIX ? i don't have on my FREEBSD 8.1-R a sysctl hw.em.msix ... i have em card 82751EB. is msix NIX related? Thanks in advance, Sami On Mon, Oct 3, 2011 at 11:20 AM, Jack Vogel wrote: > Can you try the driver in 8.2 and possibly stable/8 to

Re: em(4) high latency w/o msix

2011-10-03 Thread Jack Vogel
Can you try the driver in 8.2 and possibly stable/8 to see the behavior there. And, just curious, why are you disabling MSIX? Jack On Mon, Oct 3, 2011 at 12:51 AM, Hooman Fazaeli wrote: > ** > Hi Jack > > The hardware is a PCIe network appliance with 3 port modules. The ports I > have > used

Re: em(4) high latency w/o msix

2011-10-02 Thread Arnaud Lacombe
Hi, On Sun, Oct 2, 2011 at 8:29 PM, Arnaud Lacombe wrote: > Hi, > > On Sun, Oct 2, 2011 at 12:08 PM, Jack Vogel wrote: >> On what hardware? >> > Only the 82574 is using em(4)'s MSI-X. > FWIW, I'm not seeing this issue on a 82574 box I've access to: result of the following command: # ping -nqt

Re: em(4) high latency w/o msix

2011-10-02 Thread Jack Vogel
There are differences between adapter and LOM, furthermore, someone could toggle the variable on hardware not using it... SO my question stands, I want to know hardware details. Jack On Sun, Oct 2, 2011 at 5:29 PM, Arnaud Lacombe wrote: > Hi, > > On Sun, Oct 2, 2011 at 12:08 PM, Jack Vogel wr

Re: em(4) high latency w/o msix

2011-10-02 Thread Arnaud Lacombe
Hi, On Sun, Oct 2, 2011 at 12:08 PM, Jack Vogel wrote: > On what hardware? > Only the 82574 is using em(4)'s MSI-X. - Arnaud > Jack > > > On Sun, Oct 2, 2011 at 6:42 AM, Hooman Fazaeli wrote: > >> >> Latest em(4) driver from HEAD seems to have high latency >> when MSIX is disabled. >> >> With

Re: em(4) high latency w/o msix

2011-10-02 Thread Jack Vogel
On what hardware? Jack On Sun, Oct 2, 2011 at 6:42 AM, Hooman Fazaeli wrote: > > Latest em(4) driver from HEAD seems to have high latency > when MSIX is disabled. > > With MSIX enabled (hw.em.enable_msix=1): > > # ping -c5 192.168.1.83 > PING 192.168.1.83 (192.168.1.83): 56 data bytes > 64 byt