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Message-ID: <87618083B2453E4A8714035B62D6799216E25153@FMSMSX102.amr.corp.intel.com> Date: Tue, 25 Sep 2012 17:58:38 +0000 From: "Tantilov, Emil S" <emil.s.tantilov@...el.com> To: Charles <charles.vejnar@...ge.ch>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: RE: ixgbe unstable performance at 1Gb/s >-----Original Message----- >From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org] On >Behalf Of Charles >Sent: Monday, September 24, 2012 10:47 AM >To: netdev@...r.kernel.org >Subject: ixgbe unstable performance at 1Gb/s > >Hi, > >I hope I am posting on the right mailing-list. If not, sorry; please >redirect me >to the right place. Thanks. > >I have a new motherboard with integrated Intel X540 10GBase-T. For now, I >want >to use it at 1Gb/s. > >The bandwidth is only of ~300 Mbit/s (with Iperf). It's actually very >unstable >(always varies between 100 to 800 Mbit/s during the transfer). Do you by any chance have CONFIG_IXGBE_PTP set in your kernel config? If so, try disabling it and see if it fixes your performance. Thanks, Emil -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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