Date: Tue, 6 Nov 2018 11:08:48 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: OpenCL CL_INVALID_DEVICE (-33) error in opencl_common.c:452 On 2018-11-06 07:35, Powen Cheng wrote: > Hello, I'm having problem running john using multiple GPU devices on the > same system. I have no idea what this error meant. > > OpenCL CL_INVALID_DEVICE (-33) error in opencl_common.c:452 - Error > querying PLATFORM_NAME > > As you can see below, I have 2 GPUs on this system. so --devices=0,1 > --fork=2 is correct, I am assume. That looks correct to me. > tezos@...os-Desktop:~/JohnTheRipper/run$ ./john --devices=0,1 --fork=2 > --format=tezos-opencl --session=tezos tezos You should be specifying a cracking mode as well, or you'll end up running batch mode including "single" mode which is sub-optimal for GPU. > Using default input encoding: UTF-8 > Loaded 1 password hash (tezos-opencl, Tezos Key [PBKDF2-SHA512 OpenCL]) > Cost 1 (iteration count) is 2048 for all loaded hashes > Will run 4 OpenMP threads per process (8 total across 2 processes) > Node numbers 1-2 of 2 (fork) > OpenCL CL_INVALID_DEVICE (-33) error in opencl_common.c:452 - Error > querying PLATFORM_NAME > Device 0@...os-Desktop: GeForce GTX 1070 Ti > Press 'q' or Ctrl-C to abort, almost any other key for status Does it always fail like this? I have seen some strange race condition problem with later nvidia drivers and I've been testing a work-around hack for some time. Perhaps it's time to merge that to the repo. You could always try running two sessions (in two different terminal sessions) without fork, like this: ./john -dev=0 -node=1/2 -form=tezos-opencl -ses=tezos1 tezos -inc ./john -dev=1 -node=2/2 -form=tezos-opencl -ses=tezos2 tezos -inc magnum
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