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From: Mohammad El-Shabani <mohammad.elshabani@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] librte_pmd_ixgbe implementation of ixgbe_dev_rx_queue_count
Date: Mon, 28 Mar 2016 18:45:26 -0700	[thread overview]
Message-ID: <CAF_W8bccw4YAXNEVFwdTfWoFW_ZdrspTNVdtynigtAQLa4zsDQ@mail.gmail.com> (raw)

Hi,
Looking into why it hurts performance, I see that ixgbe_dev_rx_queue_count
is implemented a scan of elements of rx descriptors, which is very
expensive. I am wondering why its implemented the way it is. Could it not
just read the head location from the driver?

Thanks!
Mohammad El-Shabani

             reply	other threads:[~2016-03-29  1:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-29  1:45 Mohammad El-Shabani [this message]
2016-03-29  2:22 ` Lu, Wenzhuo
2016-03-29  9:31 ` Bruce Richardson
2016-03-29 16:54   ` Stephen Hemminger
2016-03-30 14:23     ` Bruce Richardson

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