Date: Fri, 4 Sep 2015 11:49:14 +0200 From: Frank Dittrich <frank.dittrich@...lbox.org> To: john-dev@...ts.openwall.com Subject: Re: 23% performance regression for brypt (Intel i5-4570 CPU) On 09/03/2015 07:59 PM, magnum wrote: > Some more tests on various gear: > > i7-4790 (core i7 Haswell, AVX2) gcc 4.8.2: > Huge boost for X3 except when running HT (slight loss) BTW, on well (i7-4770K CPU @ 3.50GHz), the best combination for combined c/s rate is to run 6 processes with BF_X2 = 1 and 2 processes with BF_X2 = 3. This resulted in a combined c/s rate of 6912, while 8* BF_X2 = 1 just got 6764. (I ran --test=120 with 8 separate processes.) I guess for more processes with BF_X2 = 3, the limited cache could be the problem. Of course, combining processes with different max. keys per crypt makes defining an optimal attack harder. Frank
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.