netdev - Re: [PATCH] pktgen node allocation

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Date:	Fri, 19 Mar 2010 14:35:22 +0100
From:	robert@...julf.net
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Robert Olsson <robert@...julf.net>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] pktgen node allocation


Eric Dumazet writes:
 > Le vendredi 19 mars 2010 à 09:44 +0100, Robert Olsson a écrit :
 > 
 > I cannot understand how this can help.
 > 
 > __netdev_alloc_skb() is supposed to already take into account NUMA
 > properties :
 > 
 > int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
 > 
 > If this doesnt work, we should correct core stack, not only pktgen :)
 > 
 > Are you allocating memory in the node where pktgen CPU is running or the
 > node close to the NIC ?

 I didn't say it should help the idea was to give some hooks to 
 experiment and see effects with different node memory allocations.
 There are many degrees of freedom wrt buses(device)/CPU/menory.

 Cheers
				--ro

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