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From: "Zhenyu Wu" <y030729@njupt.edu.cn>
To: linux-kernel@vger.kernel.org
Subject: VQs in Gred!
Date: Wed, 29 Dec 2004 15:54:52 +0800	[thread overview]
Message-ID: <304306892.28448@njupt.edu.cn> (raw)

Hello,

We know, VQs are used in Gred to offer different schedulers, in order to make
clear what the 
VQs are, I have read the sch_gred.c in net/sched/. In the function gred_enqueue(),
at first it will 
find the VQ(q) according to the lower four bits of the skb->tc_index, then some
parameters of the
q is modified, such as q->packetsin and q->bytesin. At last the packet was put
into the  physical
Queue using __skb_queue_tail(). When dequeue the packet, only the function
__skb_dequeue()
is called, and the VQ parameters are modified. Then the packets from all VQS will
enter and 
store in the physical queue (sch->q), and be dequeued from there. HOW does the
Gred schedule
packets of differnet priorities?

Thanks,




             reply	other threads:[~2004-12-29  6:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-12-29  7:54 Zhenyu Wu [this message]
2004-12-29 15:49 ` VQs in Gred! Thomas Graf
  -- strict thread matches above, loose matches on Subject: below --
2004-12-30  1:36 Zhenyu Wu
2004-12-30  0:58 ` Thomas Graf

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