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From: Zach Brown <zach.brown@oracle.com>
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
Date: Thu, 22 Feb 2007 13:30:39 -0800
To: David Miller <davem@davemloft.net>
Sender: linux-kernel-owner@vger.kernel.org
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> The more I think about it, a reasonable solution might actually be to
> use threadlets for disk I/O and pure event based processing for
> networking.  It is two different handling paths and non-unified,
> but that might be the price for good performance :-)

I generally agree, with some comments.

If we come to the decision that there are some message rates that are  
better suited to delivery into a user-read ring (10gige rx to kevent,  
say) then it doesn't seem like it would be much of a stretch to add a  
facility where syslet completion could be funneled into that channel  
as well.

I also wonder if there isn't some opportunity to cut down the number  
of syscalls / op in networking land.  Is it madness to think of a  
call like recvmsgv() which could provide a vector of msghdrs?  It  
might not make sense, but it might cut down on the per-op overhead  
for loads that know they're going to be heavy enough to get a decent  
amount of batching without fatally harming latency.  Maybe those  
loads are rare..

- z 
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