* [dpdk-dev] packet sojourn time on TX/RX queues
@ 2016-10-18 11:53 Ali Volkan Atli
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From: Ali Volkan Atli @ 2016-10-18 11:53 UTC (permalink / raw)
To: dev
Hello
I'm trying to implement CoDel algorithm on Intel's DPDK library, so I need to measure packet sojourn time (the time a packet stays in the queue before being sent) but I have trouble with measuring packet sojourn time on RX/TX queues because of DMA usage. When I call rte_eth_tx_burst() function, DPDK puts packets into DMA-region using ring buffer and I have no idea when packets sent really into network. Likewise, when I call rte_eth_rx_burst(), I don't have any idea when packets arrived because I'm pulling the packets from ring buffer handled by DMA, so I'm not sure totally but I think I have no chance to measure sojourn time for dma-like implementation. Could you please correct me if I'm wrong. Also any comments/suggestions would be greatly appreciated.
Thanks in advance..
- Volkan
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2016-10-18 11:53 [dpdk-dev] packet sojourn time on TX/RX queues Ali Volkan Atli
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