netdev - Re: [PATCH v6] net: batch skb dequeueing from softnet input_pkt

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Message-ID: <1272836755.2173.153.camel@edumazet-laptop>
Date:	Sun, 02 May 2010 23:45:55 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	David Miller <davem@...emloft.net>, hadi@...erus.ca,
	xiaosuo@...il.com, therbert@...gle.com, shemminger@...tta.com,
	netdev@...r.kernel.org, lenb@...nel.org, arjan@...radead.org
Subject: Re: [PATCH v6] net: batch skb dequeueing from softnet
 input_pkt_queue

Le dimanche 02 mai 2010 à 23:25 +0200, Andi Kleen a écrit :

> It's pointless to send an IPI to your thread sibling for this. 
> Everything it could do you can do yourself too with the same performance.
> 
> -Andi

Amen

Tests just prove the reverse.

I have some collegues that disable HyperThreading for exact same
reasons. I wonder why Intel designed HT. Should be marketing I guess.



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