Re: TX performance of Intel 82546

[Robert Olsson <Robert.Olsson@xxxxxxxxxxx>]

P@xxxxxxxxxxxxxx writes:

 > So I'm guessing that increasing the PCI-X burst size setting
 > (MMRBC) will automatically get more packets sent per transfer?
 > I said previously in this thread to google for setpci and MMRBC,
 > but what I know about it is...
 > 
 > To return the current setting(s):
 > 
 > setpci -d 8086:1010 e6.b
 > 
 > The MMRBC is the upper two bits of the lower nibble, where:
 > 
 > 0 = 512 byte bursts
 > 1 = 1024 byte bursts
 > 2 = 2048 byte bursts
 > 3 = 4096 byte bursts
 > 
 > For me to set 4KiB bursts I do:
 > 
 > setpci -d 8086:1010 e6.b=0e

 Thanks!
 That should definitely be tested. Four runs w. pktgen should be enough.

                                                --ro