Date: Wed, 30 Aug 2006 12:28:45 +0300 From: Danny Braniss <danny@cs.huji.ac.il> To: freebsd-stable@FreeBSD.org, freebsd-net@FreeBSD.org Subject: tcp/udp performance Message-ID: <E1GIMNJ-0000Dd-QH@cs1.cs.huji.ac.il>
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ever since 6.1 I've seen fluctuations in the performance of the em (Intel(R) PRO/1000 Gigabit Ethernet). motherboard OBN (On Board NIC) ---------------- ------------------ 1- Intel SE7501WV2S Intel 82546EB::2.1 2- Intel SE7320VP2D2 INTEL 82541 3- Sun Fire X4100 Server Intel(R) PRO/1000 test 1: writing to a NetApp filer via NFS/UDP FreeBSD Linux MegaBytes/sec 1- Average: 18.48 32.61 2- Average: 15.69 35.72 3- Average: 16.61 29.69 (interstingly, doing NFS/TCP instead of NFS/UDP shows an increase in speed of around 60% on FreeBSD but none on Linux) test2: iperf using 1 as server: FreeBSD(*) Linux Mbits/sec 1- 926 905 (this machine was busy) 2- 545 798 3- 910 912 *: did a 'sysctl net.inet.tcp.sendspace=65536' So, it seems to me something is not that good in the UDP department, but I can't find what to tweek. Any help? danny
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