From: "Jeff V. Merkey" <jmerkey@soleranetworks.com>
To: Linux kernel <linux-kernel@vger.kernel.org>
Subject: e1000 driver 2.6.18 - how to waste processor cycles
Date: Wed, 08 Nov 2006 14:38:02 -0700 [thread overview]
Message-ID: <45524E3A.7080301@soleranetworks.com> (raw)
Is there a good reason the skb refill routine in e1000_alloc_rx_buffers
needs to go and touch and remap skb memory
on already loaded descriptors/ This seems extremely wasteful of
processor cycles when refilling the ring buffer.
I note that the archtiecture has changed and is recycling buffers from
the rx_irq routine and when the routine is called
to refill the ring buffers, a lot of wasteful and needless calls for
map_skb is occurring.
Jeff
next reply other threads:[~2006-11-08 21:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-08 21:38 Jeff V. Merkey [this message]
2006-11-09 1:01 ` e1000 driver 2.6.18 - how to waste processor cycles Jesse Brandeburg
2006-11-09 2:43 ` David Miller
2006-11-09 8:46 ` Jeffrey V. Merkey
2006-11-09 22:45 ` Jesse Brandeburg
2006-11-09 22:49 ` Jeff V. Merkey
2006-11-09 22:54 ` Jeff V. Merkey
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