Date: Sat, 23 Jan 2016 11:16:43 -0800 From: Navdeep Parhar <nparhar@gmail.com> To: Marcus Cenzatti <cenzatti@hush.com> Cc: Luigi Rizzo <rizzo@iet.unipi.it>, freebsd-net@freebsd.org Subject: Re: Chelsio T520-SO-CR low performance (netmap tested) for RX Message-ID: <20160123191643.GD4574@ox> In-Reply-To: <20160123185453.0FA7CA0128@smtp.hushmail.com> References: <20160123053428.2091EA0121@smtp.hushmail.com> <20160123154052.GA4574@ox> <20160123171300.0F448A0121@smtp.hushmail.com> <CA%2BhQ2%2Bg4kU4LA4PexRPBv7z49ZWh-mDqdpw18SeoYaBueHyjZg@mail.gmail.com> <20160123174840.32B1DA0121@smtp.hushmail.com> <20160123183836.GB4574@ox> <20160123185453.0FA7CA0128@smtp.hushmail.com>
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On Sat, Jan 23, 2016 at 04:54:52PM -0200, Marcus Cenzatti wrote: ... > here is the output for netstat when I pkt-gen -f tx un-throttled (14Mpps): > > input (Total) output > packets errs idrops bytes packets errs bytes colls drops > 900k 0 0 55M 3 0 550 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 9 0 2.4K 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 > 900k 0 0 55M 3 0 422 0 0 This means that the chip really is getting ~900K packets per second from the wire. If it was receiving 14.8M and delivering 900K you'd have seen 14.8M in packets and 13.9M (14.8 - 900K) in idrops. Regards, Navdeep
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