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From: Daniel Borkmann <dborkman@redhat.com>
To: Alexander Sverdlin <alexander.sverdlin@nsn.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org,
	linux-sctp@vger.kernel.org,
	Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nsn.com>,
	Vlad Yasevich <vyasevich@gmail.com>,
	pbutler@sonusnet.com
Subject: Re: [PATCH net] Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer"
Date: Tue, 15 Apr 2014 09:08:37 +0200	[thread overview]
Message-ID: <534CDAF5.1040900@redhat.com> (raw)
In-Reply-To: <534CD523.50301@nsn.com>

Hi Matija,

[cc'ing Peter]

On 04/15/2014 08:43 AM, Alexander Sverdlin wrote:
> On 14/04/14 21:45, ext Daniel Borkmann wrote:
>> This reverts commit ef2820a735f7 ("net: sctp: Fix a_rwnd/rwnd management
>> to reflect real state of the receiver's buffer") as it introduced a
>> serious performance regression on SCTP over IPv4 and IPv6, though a not
>> as dramatic on the latter. Measurements are on 10Gbit/s with ixgbe NICs.
>
> Could you please share other HW details? I wonder how much CPU power one needs for such a throughput?

If you would like to get to know the exact specifics from the bug report,
resp. numbers from the commit message, I refer you to Peter's setup, i.e.
he used ixgbe NICs as these are one of the few with SCTP checksum
offloading available.

Thanks,

Daniel

  [1] http://www.spinics.net/lists/linux-sctp/msg03290.html

  reply	other threads:[~2014-04-15  7:08 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-14 19:45 [PATCH net] Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer" Daniel Borkmann
2014-04-14 19:57 ` Vlad Yasevich
2014-04-16  6:57   ` Matija Glavinic Pecotic
2014-04-16  8:39     ` Dongsheng Song
2014-04-16  9:02       ` Alexander Sverdlin
2014-04-16 11:55         ` Matija Glavinic Pecotic
2014-04-16 13:32           ` Vlad Yasevich
2014-04-16 18:50         ` Vlad Yasevich
2014-04-16 19:05           ` Daniel Borkmann
2014-04-16 19:24             ` Matija Glavinic Pecotic
2014-04-16 19:47               ` Vlad Yasevich
2014-04-21 19:12                 ` Matija Glavinic Pecotic
2014-04-14 20:48 ` David Miller
2014-04-15  8:46   ` Alexander Sverdlin
2014-04-15  8:57     ` Daniel Borkmann
2014-04-15  6:43 ` Alexander Sverdlin
2014-04-15  7:08   ` Daniel Borkmann [this message]
2014-04-15 14:27   ` Butler, Peter

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