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Re: [Lksctp-developers] linux SACK behaviour
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From: Vlad Y. <vla...@hp...> - 2009-10-28 14:23:07
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Cristian Constantin wrote: > On Wed, Oct 28, 2009 at 09:28:15AM -0400, Vlad Yasevich wrote: >> >> Cristian Constantin wrote: >>> hi! >>> >>> in linux the default SACK timeout is 200ms. using this timeout I am >>> seeing this behaviour: >>> >>> host A (non-linux) host B (linux) >>> ------------------------------------------------------- >>> >>> data_chunk_1 -------------> >>> <------------- data_chunk_2 (+14ms) >>> (+60ms)SACK_data_chunk_2 -------------> >>> (+45ms)data_chunk_1 -------------> >>> (retrans) >>> <------------- SACK_data_chunk_1 >>> >>> the question is, why isn't the SACK for data chunk 1 piggy-backed >>> on the packet carrying data_chunk_2 (which btw has some 170 bytes - so >>> it is not because of the mtu)? can I enforce this? how? >>> >> Use 2.6.31 kernel. I has the behavior you are looking for. >> If you can't, you'll need to port some patches from 2.6.31 tree to >> your version. > > cristian: thanks. can you please tell me which patches exactly > have to be ported? > As a simple one-shot deal, you'll need commit af87b823ca2b05257192e8d48dc686db6173d7b2. For a full implementations, you'll also need these commits: 3e62abf92f34d75fe22352d8d102e3cd2755804d e83963b769a2c38b436f5dcf82309f5cbc2f6012 5d7ff261ef497c62f54c39effc259910a28b313d -vlad > bye now! > cristian >> -vlad >> >>> thanks a lot! >>> bye now! >>> cristian >>> >>> ------------------------------------------------------------------------------ >>> Come build with us! The BlackBerry(R) Developer Conference in SF, CA >>> is the only developer event you need to attend this year. Jumpstart your >>> developing skills, take BlackBerry mobile applications to market and stay >>> ahead of the curve. Join us from November 9 - 12, 2009. Register now! >>> http://p.sf.net/sfu/devconference >>> _______________________________________________ >>> Lksctp-developers mailing list >>> Lks...@li... >>> https://lists.sourceforge.net/lists/listinfo/lksctp-developers >>> > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > _______________________________________________ > Lksctp-developers mailing list > Lks...@li... > https://lists.sourceforge.net/lists/listinfo/lksctp-developers > |