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Subject: RE: InfiniBand BOF @ LSM - topics of interest
Date: Tue, 14 May 2002 13:19:13 -0700
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Thread-Topic: InfiniBand BOF @ LSM - topics of interest
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From: <Tony.P.Lee@nokia.com>
To: <alan@lxorguk.ukuu.org.uk>, <lmb@suse.de>
Cc: <woody@co.intel.com>, <linux-kernel@vger.kernel.org>, <zaitcev@redhat.com>
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> > On 2002-05-14T00:42:07,
> >    Alan Cox <alan@lxorguk.ukuu.org.uk> said:
> > 
> > > Kernel mode RPC over infiniband - relevant to mosix type 
> stuff, to McVoy
> > > scalable cluster type stuff and also to things like file 
> system offload
> > 
> > For that, a generic comm interface would be a good thing to 
> have first.
> 
> It has to be fast, nonblocking and kernel callable. Cluster 
> people count
> individual microseconds so its base layers must be extremely efficient
> even if there are "easy use" layers above. The obvious "easy 
> use" layer being
> IP over infiniband.
> 

I like to see user application such as VNC, SAMBA build directly
on top of IB API.  I have couple of IB cards that can 
send 10k 32KBytes message (320MB of data) every ~1 second over 
1x link with only <7% CPU usage (single CPU xeon 700MHz).  
I was very impressed.  

Go thru the socket layer API would just slow thing down.

With IB bandwidth faster than standard 32/33MHZ PCI, one might
run DOOM over VNC over IB on remote computer faster 
than a normal PC running DOOM locally....

One might create a OS that miror the complete process state
info (replicate all the modified page) everytime that 
process is schedule out. 


----------------------------------------------------------------
Tony Lee