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From: "Jiang, Yunhong" <yunhong.jiang@intel.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Subject: [dpdk-dev] Why pktgen-dpdk will receive more packet than sent
Date: Tue, 30 Jun 2015 02:01:23 +0000	[thread overview]
Message-ID: <DDCAE26804250545B9934A2056554AA0209CC6FD@ORSMSX112.amr.corp.intel.com> (raw)

Hi, all
	I'm trying to test the l2fwd throughput using https://github.com/pktgen/Pktgen-DPDK/blob/master/dpdk/examples/pktgen/scripts/rfc2544.lua .  However, the pktgen will receive more packets than it sent out like " Total sent 14786446 recv 14786597, delta 151". I'm really confused why this will happen. I have the pktgen machine and l2fwd machine connected to each other directly and bind the igb_uio to the NIC devices.

Pktgen> *** Test packet size 64 at rate 100%
Total sent 133856261 recv 131517412, delta -2338849
*** Test packet size 64 at rate 50%
Total sent 40208555 recv 40207420, delta -1135
*** Test packet size 64 at rate 25%
PMD: ixgbe_set_rx_function(): Vector rx enabled, please make sure RX burst size no less than 32.
Total sent 14786446 recv 14786597, delta 151
*** Test packet size 64 at rate 37%
PMD: ixgbe_set_rx_function(): Vector rx enabled, please make sure RX burst size no less than 32.
Total sent 26824256 recv 26823587, delta -669

Any hints will be really helpful, thanks!

Thanks
--jyh

             reply	other threads:[~2015-06-30  2:01 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-30  2:01 Jiang, Yunhong [this message]
2015-06-30  3:15 Wiles, Keith

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