linux-kernel - Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <E58A1635-E5E7-4E0F-A231-29239CA2B148@oracle.com>
Date:	Thu, 22 Feb 2007 13:30:39 -0800
From:	Zach Brown <zach.brown@...cle.com>
To:	David Miller <davem@...emloft.net>
Cc:	mingo@...e.hu, johnpol@....mipt.ru, arjan@...radead.org,
	drepper@...hat.com, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, hch@...radead.org, akpm@....com.au,
	alan@...rguk.ukuu.org.uk, suparna@...ibm.com,
	davidel@...ilserver.org, jens.axboe@...cle.com, tglx@...utronix.de
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

> 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 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/