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xen-devel
[Xen-ia64-devel] Re: [Xen-devel] [PATCH] Add netfornt tx_queue_len
Hi Herbert-san
Thank you for your comment.
I agreed.
I examine the another way.
It is likely to go well if something is added to the check
on netfront_tx_slot_available().
Best regards.
Tomonari Horikoshi,
Herbert Xu wrote:----------------------
Sent: Wed, 24 Jan 2007 13:29:51 +1100
Subject: Re: [Xen-devel] [PATCH] Add netfornt tx_queue_len
> On Wed, Jan 24, 2007 at 01:37:55AM +0000, Tomonari Horikoshi wrote:
> >
> > When I executed "netperf" by a short message of UDP,
> > PV domain and PV-on-HVM driver issued Call trace.
> >
> > I think that GrantEntry was filled with a lot of messages processings.
> >
> > This problem is generated in IA64 only.
> > Probably, I think that I am the following problems.
> >
> > In IA64
> > NET_TX_RING_SIZE 1024, NR_GRANT_ENTRIES 2048
> > In x86
> > NET_TX_RING_SIZE 256, NR_GRANT_ENTRIES 2048
> >
> > I corrected to check "number of unprocessing queue > tx_queue_len" before
> > Grant was filled.
> >
> > However, my correction influences x86.
> > Please teach to me in that when there is a better improvement.
>
> Sorry, but this patch looks bogus. The tx queue is maintained by
> Linux and has nothing to do with the driver. So limiting its length
> based on internal state of the driver can't be right.
>
> We need to find out what's really going wrong with the grant table
> entries here.
>
> Cheers,
> --
> Visit Openswan at http://www.openswan.org/
> Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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