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Message-ID: <60157.89.139.64.58.1163542547.squirrel@dev.mellanox.co.il> Date: Wed, 15 Nov 2006 00:15:47 +0200 (IST) From: eli@....mellanox.co.il To: linux-kernel@...r.kernel.org, linux-net@...r.kernel.org Subject: UDP packets loss Hi, I am running a client/server test app over IPOIB in which the client sends a certain amount of data to the server. When the transmittion ends, the server prints the bandwidth and how much data it received. I can see that the server reports it received about 60% that the client sent. However, when I look at the server's interface counters before and after the transmittion, I see that it actually received all the data that the client sent. This leads me to suspect that the networking layer somehow dropped some of the data. One thing to not - the CPU is 100% busy at the receiver. Could this be the reason (the machine I am using is 2 dual cores - 4 CPUs). The secod question is how do I make the interrupts be srviced by all CPUs? I tried through the procfs as described by IRQ-affinity.txt but I can set the mask to 0F bu then I read back and see it is indeed 0f but after a few seconds I see it back to 02 (which means only CPU1). One more thing - the device I am using is capable of generating MSIX interrupts. Thanks from advance Eli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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