Date: Sat, 5 Sep 2015 14:43:54 +0000 (UTC) From: Nomad Esst <noname.esst@yahoo.com> To: "freebsd-drivers@freebsd.org" <freebsd-drivers@freebsd.org> Subject: em, igb performance test Message-ID: <1725304810.2091726.1441464234074.JavaMail.yahoo@mail.yahoo.com>
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Hi allDuring some performance tests, we found out some weird problems. We u= se a shell script that do the following : do from 1 to 10Shutdown em/igb interfacesleep 3Bring em/igb interface uptcp= replay -i em0 -l ospf_hello.pcap=C2=A0sleep3end By running this shell on one side we expect 10 ospf hello packets to get ar= rived at the other side, but tcpdump (on the other side) shows 4, sometimes= 8 and etc ... (not all 10 packets are arrived at the other side).We test t= his scenario with a Cisco router, and all packets are received at the Cisco= side. What causes this packet loss in FreeBSD (maybe in em or igb drivers)= ?I know that this scenario may not have any use in the real world, but I'm = curious, why Cisco don't have such behavior.Thanks in advance. Regards.
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