From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Simon Wunderlich Date: Tue, 13 Nov 2018 16:26:14 +0100 Message-ID: <2217702.0z5C6BKyfH@prime> In-Reply-To: References: <5197276.b4DnEGo6x7@prime> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart5142418.zUjExCIZgx"; micalg="pgp-sha512"; protocol="application/pgp-signature" Subject: Re: [B.A.T.M.A.N.] broadcast storms List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jake.Harris@zf.com Cc: b.a.t.m.a.n@lists.open-mesh.org --nextPart5142418.zUjExCIZgx Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" On Tuesday, November 13, 2018 2:55:31 PM CET Jake.Harris@zf.com wrote: > > Mhm, this is really not much data ... did you try the multicast as > > suggested in an earlier reply? > What earlier reply are you referring to? The only one I'm noticing is the > tip to boost the multicast bandwidth, but I cannot see this being fruitful > to update the configuration of all 50 nodes when worst-case I'm using less > than 1% of the max throughput. One aspect is that the multicast rate is also changing the modulation rate of beacons. If you have >50 nodes beaconing with 1 Mbit/s you are already filling up your airtime with beacons. Do the math - one beacon takes about 1ms on 1 Mbit/s, each node sends about 10 beacons per second ... This is actually very important and will most likely help already. It would be a better fix than changing the protection window. > > BATADV_RESET_PROTECTION_MS is a define in the batman-adv C-code, so it > > can't be set at runtime but only at compile time. > While this sounds like an utter pain in the butt to recompile and update the > code on all the nodes to make this change, I believe this has a far better > chance of alleviating the issue, I'm looking into how to do this since I've > never compiled anything myself but I can't see it being too difficult. > > One observation I made when rebooting the swarm all at once, about a minute > after all the pi's go down the laptop I work off (running batctl td bat0) > reports a whole bunch of backbone unannounced messages I believe. I'm > assuming there is one message per node but have not verified, my guess is > this is normal and is not the cause of these issues? > > Again, thank you --nextPart5142418.zUjExCIZgx Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE1ilQI7G+y+fdhnrfoSvjmEKSnqEFAlvq7RYACgkQoSvjmEKS nqFo9xAAjvN/QzAlyrBWFbUJoaQGSnABZCvK4Drzg07InfGH4x+tBmG1KXwN0b/N vTnXkaqjBgAmb1raI6F/7ocWwb6Uk64GBNioAhCxO679q49sbc3dmCiPXRK2qKNy 90MB3qbsEySLsfpkXJNaPfQ9/cO7KMGPumn2u2OaRuy8RcwrUNkVjDUJYHv0hbrp IWysGS3Xefnjh/0Jstpa5LRQHllAaaYIWN6mym0Q+V6M8nrHmm5A2MpE61744KA4 cPoac/GTnP02YGhmwlNjRa7276uuNEnDOGpdZ456c68bQtILe+UWm6eWtR/YQ+Np 8Wbxv89VOhevnsKO9jZQrnk/XwjkfGWxMZ0e4nnSIWoUi3Q2mfGMLYad127BG9Cd ElsJeyoXD89kOndYggyzsirWf66NMEgXDoGx26nKHAcgiIMSzJMJYn1MLYVUGLEh g2xZEpAWNbLGgcZut8RnWJEBAsrDSRUNXEpeD3GLFSzSv/cPlt7ooi5my56ueHIT H7ufBmDCJa056lgVBL4zSMezrQIi3nBkkRoQsgFFMsD0CbKDzr4eibCswok1Xl21 vA/+GnhYRnSmKpF444lMsOmR5uaji1rU495ftztLyfoTvFp3Yzl2/zqJsxUT/Yyv WWZZKB9b8OzWZvvEhp4PER1i1AcMNlCALsx6H+hABQ1141eaank= =D5i0 -----END PGP SIGNATURE----- --nextPart5142418.zUjExCIZgx--