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From: Stephen Hemminger <stephen@networkplumber.org>
To: Gokul Bargaje <gokulbargaje.182009@nitk.edu.in>
Cc: Ferruh Yigit <ferruh.yigit@intel.com>, dev@dpdk.org, users@dpdk.org
Subject: Re: [dpdk-dev] [dpdk-users] What is the 'unit of timestamp' assigned to mbuf packet in DPDK?
Date: Fri, 22 Nov 2019 09:05:40 -0800
Message-ID: <20191122090540.7ed70003@hermes.lan> (raw)
In-Reply-To: <CAH1-=xh_ngR-2r2gt+e_66QRN4Ec7NbXoXqW2tQXf9Vx7tTi=w@mail.gmail.com>

On Fri, 22 Nov 2019 22:30:11 +0530
Gokul Bargaje <gokulbargaje.182009@nitk.edu.in> wrote:

> Thank you for the clarification. But I am still unable to understand how
> exactly timestamp is calculated before assigning to a timestamp field.
> Could you please tell me the steps to calculate the timestamp in DPDK?
> 
> I have to implement the PIE AQM algorithm in DPDK and for that, I need to
> calculate the total time spent by the packet waiting in queue (i.e. the
> difference between enqueue time and dequeue time).

The use of timestamp field is very spotty.
Only mellanox implements it.


  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18 14:29 [dpdk-dev] " Gokul Bargaje
2019-11-22 14:48 ` [dpdk-dev] [dpdk-users] " Ferruh Yigit
2019-11-22 17:00   ` Gokul Bargaje
2019-11-22 17:05     ` Stephen Hemminger [this message]
2019-11-27 14:49     ` Tom Barbette
2019-11-28  8:28     ` Harman Kalra
2019-11-25 10:56 ` Archit Pandey

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