Date: Wed, 18 Jun 1997 13:48:01 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: sthaug@nethelp.no Cc: ccsanady@scl.ameslab.gov, hackers@freebsd.org, matt@3am-software.com Subject: Re: Network concurrency problems!? Message-ID: <Pine.BSF.3.95q.970618134115.11180D-100000@misery.sdf.com> In-Reply-To: <3666.866665118@verdi.nethelp.no>
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On Wed, 18 Jun 1997 sthaug@nethelp.no wrote: .. > Also, if you expect a PPro-200 to saturate 4 100 Mbps links, I think you > are a wee bit optimistic. (One link, no problem.) Why? As long as the ethernet hw is fast, is should be no problem. I can run 2 FW SCSI channels saturated (2 x 20MB/s * 8 = 320mbs), and the system isn't even working too hard yet. Certainly, full-duplex connections double the total possible bandwidth (4 x 100 x 2 = 800mbs), but most servers are mainly outbound. However, I really doubt whether most ethernet adapters offload enough functions from the main CPU. The trend is to make very stupid controllers, which are slaved to the CPU for everything. > Steinar Haug, Nethelp consulting, sthaug@nethelp.no > > Tom
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