Date: Tue, 12 Apr 2011 20:46:40 +0200 From: Ulrich =?utf-8?B?U3DDtnJsZWlu?= <uqs@spoerlein.net> To: Denny Schierz <linuxmail@4lin.net> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Network throughput: Never =?utf-8?q?get_more_than_112MB/s_?= =?utf-8?b?w7xiZXI=?= two NICs Message-ID: <20110412184639.GA85668@acme.spoerlein.net> In-Reply-To: <1302516039.3223.222.camel@pcdenny> References: <1302516039.3223.222.camel@pcdenny>
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On Mon, 11.04.2011 at 12:00:39 +0200, Denny Schierz wrote: > hi, > > after testing severals loadbalancing (LACP) types with Cisco, we saw, > that we never get more than 112MB/s with two network cards and iperf. > > So, we tested without loadbalancing, 4 Clients (iperf -f M -c <ip>) and > two target IPs. Every IP has his own 1Gb/s network card. > On the end, two clients had a connection to IP 1 and the second two to > IP 2. > > First we used the two onboard NICs and then, one onboard and one > external NIC, but without success. We never get more then 112MB/s > > All are connected through a Cisco Catalyst WS-X4515. > > The mainboard is a Intel S3420GP. Are the NICs PCI or PCIe? If the former, IIRC the PCI bus bandwidth maxes out at 133MB/s so that might explain your numbers. If your NICs are PCIe, I have no helpful clues, sorry. Uli
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