[openib-general] Should I use umad -or- osm

[Michael S. Tsirkin]

Quoting r. Philip Mucci (mucci at cs.utk.edu) "RE: [openib-general] Should I use umad -or- osm":
> Hi Shahar,
> 
> Thanks for the info. 
> 
> My needs are very 'simple'. Just to send and receive MADS to the PM
> agent on each adapter and switch in the network. 
> 
> Ideally, I would like this to work for existing installations based on
> either OpenIB gen1 or Mellanox Gold. But I think for that, I need to use
> the current osm_vendor_api.h interface.
> 
> How much will this interface change with gen2? will it export the same
> functions? Or will everything change
> 
> Lastly, will I be able to send/recv these MADS as a non-root user?
> 
> Thanks again, and the answer to your question is, yes, I can wait.
> 
> Regards,
> 
> Philip
> 
> 
> On Thu, 2004-12-09 at 17:52 +0200, shaharf wrote:
> > Hi Philip,
> > 
> > 	I am currently implementing umad access library. It much simpler
> > then the osm_vendor api. I would recommend using umad library and not
> > osm. As a matter of fact the current osm vendor layer does not support
> > openib gen2. I am working on that either. Both the umad access library
> > and the new osm vendor layer that uses it are not finished yet. I guess
> > that I will need at least another week to reach a point where I can
> > release it. Even then it will change a lot until I will be finished with
> > it.
> > The question is can you wait a little? I can give you a preliminary
> > version - but if you will use it you will have to modify your code
> > several each time the library interface is changed.
> > On the other hand, I would like to understand exactly what you need,
> > because you are the first "client" of the user mode stuff beside me.
> > 
> > Shahar 
> > 
> > > -----Original Message-----
> > > From: openib-general-bounces at openib.org [mailto:openib-general-
> > > bounces at openib.org] On Behalf Of Philip Mucci
> > > Sent: Thursday, December 09, 2004 3:25 PM
> > > To: openib-general at openib.org
> > > Subject: [openib-general] Should I use umad -or- osm
> > > 
> > > Hi folks,
> > > 
> > > I've been tasked with developing a rough performance tool for IB
> > > networks. I've scanned the documentation and looks like the kind of
> > > data
> > > we're interested in can be obtained from the Mellanox ASICs.
> > > 
> > > My question is a simple one:
> > > 
> > > I've got to send/recv mads to enable and obtain the performance
> > > counters
> > > from a user space tool...ideally non-root, but we'll work with what we
> > > have.
> > > 
> > > My current inclination has been to use the osm_vendor_api.h functions
> > > to
> > > do this work. However, the late work here done by Hal on the UMAD
> > > access
> > > layer seems to be appropriate as well.
> > > 
> > > Could someone elaborate on what you think the best (and most
> > > maintainable) approach to accomplishing this task might be?
> > > 
> > > Regards,
> > > 
> > > Philip


Its clearly not a great idea to let non-root inject arbitrary MADs
into the system ,is it?

MST