-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm not sure why I missed this first post but I'm very interested in working on this project with whomever is interested. I bought a pogoplug v2 specifically to test it's usefulness as a tor exit or relay. - -Jason
On 10/01/2013 06:39 PM, Andy Isaacson wrote: > On Fri, Sep 13, 2013 at 12:25:47AM +0200, Sarah Vigote wrote: >> I would like to run a 100Mb/s tor exit node, but I have issues >> wrt power consumption. >> >> reading >> http://ortizaudio.blogspot.fr/2011/10/using-dreamplugs-crypto-chip.html >> >> it seems dreamplugs has *fast* aes-128-ecb. >> >> Does anyone have any experience running a node based on cheap >> crypto chip (dreamplug, marvell 88F6282, sheeva-core, padlock, >> ...) ? What performance can I expect out of these ? > > Unfortunately AES is not the primary CPU consumer on Tor nodes > right now; we spend a lot more time doing bignum computation for > TAP circuits. Crypto accelerators don't work very well for > bignums. > > It's not a perfect equivalence, but "openssl speed rsa" should give > a reasonable estimate of how well your chip will do for TAP > circuit creation. Here's a dual-core Westmere at 2.1 GHz (should > be fairly close to a modern Xeon core): > > sign verify sign/s verify/s rsa 512 bits 0.000105s 0.000007s > 9548.7 137778.7 rsa 1024 bits 0.000340s 0.000021s 2941.1 > 48539.0 rsa 2048 bits 0.002205s 0.000070s 453.4 14362.8 rsa > 4096 bits 0.016398s 0.000260s 61.0 3840.3 > > A single Xeon core can currently handle most of a 100 Mbps exit > node's traffic, so you should look for a dual-core chip that > delivers at least 1500 sign/s on rsa-1024. Unfortunately I doubt > there are any ARM chips that can compete. > > -andy _______________________________________________ tor-relays > mailing list tor-relays@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSSxhfAAoJEOXtwcWdKrpuG4cP/04KspbxenNkcLXvXWPdiUTi UJlg2EOphyHlMp8lUPQPcHprYAWEQUjTpUevxZXNhjhr6oGrw/OVem1Ht74DpjA/ 9rg+0z4m/YiRCUCSLtl5aLqE65z8bN9NM00qyppDLCEsu/ogR3qXDibUNjIAjmfg 8qRcoA28xJ3hn0eo21AB1aZ/clkUF5REAPoLeG2K7Nmz1sBznky0NxtdgHx+bPP/ utQg5n797pIUx3PjWsV/PnebeJ2VPFCkM6ZI06jINcYHXVLGn1B/2NklGSUrwNLf 4W7vIWptENHjcsM4XBLcnPt8DzrtNEPKOemKLRledWFOE2Kha/nBqMRoExXjEgbA 1VNE1gbwNIsUEbr1uEuAu2cbfvHXw1wPMWvn9dV+4Kh4srhARiq+4xZ7qRAGxrbr uf2klMY+brrwf6nLJsbPxAdKWZCLNCe1CIrpb9mX/SJVCb8qWGMXSxnDbpqfZsYU CxJy2JQ9VeVaPCNypjm2PQprBz2vt/QGlaXELiL446QVveSZIv6e4QCGSSmHPvww TeqCRkvgGj5tE43On2cj0YBmuLjJXnsA2K3+KrZtshVp1qBQIf3FevhHCzKljdW4 QYn7v/kBWRlko/79iJMp9FP7jL6gsfiHj9NkEjAer04Esnyych5aXpNEv2GXDKyr 8omA70GBANyUybmIk7aW =hL5v -----END PGP SIGNATURE----- _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
