Re: Cause of Large Latency Difference Between 1179-byte and 1180-byte UDP Frames?

2015-05-21 Thread Todd Bezenek
(solution below) The time to send that extra byte over the wire is 8 nsec. It seems unlikely that would produce such a clean-cut difference, but I've been surprised before. :) The idle=poll parameter sounds like a good idea for any application which tries to maintain real-time behavior. I'm

Re: Cause of Large Latency Difference Between 1179-byte and 1180-byte UDP Frames?

2015-05-21 Thread Alexander Duyck
On 05/20/2015 09:50 PM, Todd Bezenek wrote: I'm pushing 10,000 frames per second of UDP traffic through a Linux system with a bridge configured between two 1GbE ports. Iptables is installed and running, but the default rule is ACCEPT with no other rules. When I make the packets 1179 bytes in

Cause of Large Latency Difference Between 1179-byte and 1180-byte UDP Frames?

2015-05-20 Thread Todd Bezenek
I'm pushing 10,000 frames per second of UDP traffic through a Linux system with a bridge configured between two 1GbE ports. Iptables is installed and running, but the default rule is ACCEPT with no other rules. When I make the packets 1179 bytes in size (total size includes Ethernet header,