[openib-general] why sdp connections cost so much memory

[zhu shi song]

--- "Michael S. Tsirkin" <mst at mellanox.co.il> wrote:

> Quoting r. zhu shi song <zhushisongzhu at yahoo.com>:
> > Subject: Re: why sdp connections cost so much
> memory
> > 
> > >> You mean - when only a single socket is open?
> > Every one connection will cost 2M RAM. So I make
> the
> > following changes:
> > #define SDP_TX_SIZE 0x4
> > #define SDP_RX_SIZE 0x4
> 
> You should not need this change with the scale patch
> I posted - after applying
> this, and setting the scale parameter to 0x1, each
> connection should use around
> 128K for RX. Please confirm.
can each connection use 64K  memory?
 
> > > The SDP protocol uses ARP over IPoIB for its
> address
> > > resolution.
> > > So you'd need to find some other way to perform
> > > address resolution.
> > >
> > I'll try pre-resolute the address, So I can remove
> ARP
> > from ipoib
> 
> But you'll still need the ipoib module loaded.
> 
is it difficult not to load ipoib module?

zhu


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