linux-kernel - RE: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS

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]

Date:	Sun, 19 Aug 2007 18:45:24 -0700
From:	"Felix Marti" <felix@...lsio.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	"David Miller" <davem@...emloft.net>, <jeff@...zik.org>,
	<netdev@...r.kernel.org>, <rdreier@...co.com>,
	<linux-kernel@...r.kernel.org>, <general@...ts.openfabrics.org>
Subject: RE: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCPportsfrom the host TCP port space.



> -----Original Message-----
> From: ak@...e.de [mailto:ak@...e.de] On Behalf Of Andi Kleen
> Sent: Sunday, August 19, 2007 4:28 PM
> To: Felix Marti
> Cc: David Miller; jeff@...zik.org; netdev@...r.kernel.org;
> rdreier@...co.com; linux-kernel@...r.kernel.org;
> general@...ts.openfabrics.org
> Subject: Re: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate
> PS_TCPportsfrom the host TCP port space.
> 
> "Felix Marti" <felix@...lsio.com> writes:
> 
> > what benefits does the TSO infrastructure give the
> > non-TSO capable devices?
> 
> It improves performance on software queueing devices between guests
> and hypervisors. This is a more and more important application these
> days.  Even when the system running the Hypervisor has a non TSO
> capable device in the end it'll still save CPU cycles this way. Right
> now
> virtualized IO tends to much more CPU intensive than direct IO so any
> help it can get is beneficial.
> 
> It also makes loopback faster, although given that's probably not that
> useful.
> 
> And a lot of the "TSO infrastructure" was needed for zero copy TX
> anyways,
> which benefits most reasonable modern NICs (anything with hardware
> checksumming)
Hi Andi, yes, you're right. I should have chosen my example more
carefully.

> 
> -Andi
-
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/