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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1747B1C0@AcuExch.aculab.com> Date: Tue, 19 Aug 2014 10:28:29 +0000 From: David Laight <David.Laight@...LAB.COM> To: Linux Netdev List <netdev@...r.kernel.org> Subject: Lost ping responses As part of some other testing I've been saturating a point to point 100M ethernet links with 3 flood pings of 60k messages. The response time is then 17-20ms, and there are no missing responses. If I also do a 'normal' ping, that one sees a 25% packet loss. ifconfig doesn't show any errors, and the tx and rx counts match between the systems. All the packets seem to get lost on the system that is responding to the ping requests. Any ideas how to find out where the discards are happening? It might just be somewhere that would affect other traffic flows. Both systems are Intel i7 - so no shortage of cpu power or memory. The pings are being sent from a PCIe e1000e card, and reflected by a USB smsx95xx one. (I was just loading the USB wire, nothing odd happened during the test.) David -- 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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