Date: Fri, 4 Sep 2020 01:18:56 +0200 From: Axymeus <axymeus@...il.com> To: john-users@...ts.openwall.com Subject: Re: rar-opencl performance cRARk goes up to 20K p/s on this archive. Here's cRARk output if it helps. OpenCL device #0 GeForce RTX 2070 SUPER found, 1800 MHz, 2560 SP cores, GPU rate = 17.60 Trying to compile FAST NVIDIA OpenCL kernel. Please wait... Successfully. Running self-test... Successfully Choosing best crypto functions......... Chosen: AVX2, AVX, AVX2 (-f368), AES-NI Clock cycles per password expected = 3698751(SIMD)/15160877 (x64) (*), theoretical = 21172752 Calculating pure SHA-1 clock cycles... Pure SHA-1 clock cycles per byte expected = 0.8 (SIMD)/2.7 (x64) (*), theoretical = 4.3 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz found, CPU rate = 6.06 (*) (*) May be inaccurate if Turbo Boost is on On Fri, Sep 4, 2020 at 1:11 AM Solar Designer <solar@...nwall.com> wrote: > > On Fri, Sep 04, 2020 at 12:51:24AM +0200, Axymeus wrote: > > As you can see the performance is only marginally better in phase 3 > [...] > > Proceeding with incremental:ASCII > > 0g 0:00:04:48 3/3 0g/s 1220p/s 1220c/s 1220C/s jaith..murtos > > 0g 0:00:05:32 3/3 0g/s 1183p/s 1183c/s 1183C/s bakku..mysey > > 0g 0:00:06:24 3/3 0g/s 1183p/s 1183c/s 1183C/s saluke..mynen1 > > 0g 0:00:08:06 3/3 0g/s 1145p/s 1145c/s 1145C/s bordaku..miamm1 > > Session aborted > > > > However running rar-opencl with -test gives... 46704 c/s real, 46811 > > c/s virtual (Benchmarking: rar-opencl, RAR3 (length 5) [SHA1 OpenCL > > AES]... (12xOMP)) > > OK. Then I suspect it's the specifics of your RAR archive and/or > storage method (compressed or not) of the file inside archive that's > being attacked. In some cases, the whole data needs to be decrypted or > even uncompressed before a candidate password can be rejected. This is > done on CPU, which is why the GPU load would be low. > > What performance are you getting when using cRARk on this archive? > > Alexander
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