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Date: Tue, 15 Apr 2014 09:08:37 +0200 From: Daniel Borkmann <dborkman@...hat.com> To: Alexander Sverdlin <alexander.sverdlin@....com> CC: davem@...emloft.net, netdev@...r.kernel.org, linux-sctp@...r.kernel.org, Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@....com>, Vlad Yasevich <vyasevich@...il.com>, pbutler@...usnet.com Subject: Re: [PATCH net] Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer" 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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