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Message-Id: <ABADF628-35BB-4F8B-98AC-3474309495F5@gmail.com>
Date: Fri, 20 Mar 2015 08:28:38 +0800
From: Lei Zhang <zhanglei.april@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: [GSoC] building JtR for MIC
Oh, I forgot the attachment.
View attachment "err_msg.txt" of type "text/plain" (1562 bytes)
> On Mar 19, 2015, at 8:59 PM, Lei Zhang <zhanglei.april@...il.com> wrote:
>
> Hi Alexander,
>
> Actually using your original mic.h with autoconf results in some compile errors. I modified mic.h to include autoconfig.h and those compile errors were gone.
> I didn't encounter those errors previously because I mistakenly set ARCH_LINK=autoconf_arch.h. And when I set it to mic.h, those errors suddenly appeared. The error message is attached below.
>
> I think there're some bugs whose behavior rely on the definition of macros defined in autoconfig.h. Maybe I'll have to deal with those bugs anyway.
>
>
> Lei
>
>> On Mar 18, 2015, at 6:38 PM, Solar Designer <solar@...nwall.com> wrote:
>>
>> On Wed, Mar 18, 2015 at 05:27:45PM +0800, Lei Zhang wrote:
>>> I tweaked with OMP_SCALE in several formats, according to magnum's advices, and their memory usage on MIC is much more reasonable now. With OpenMP enabled, john-jumbo won't abort anymore when running the benchmark, although 126 of the tests still FAILED.
>>
>> That's a huge number. How many of the failed tests are for dynamic*
>> formats? Perhaps there's one or a handful of bugs that are causing most
>> of the failures.
>>
>> I notice that in jumbo my original mic.h is modified to use autoconf'ed
>> ARCH_* settings:
>>
>> #if AC_BUILT
>> #include "autoconfig.h"
>> #else
>> #define ARCH_WORD long
>> #define ARCH_SIZE 8
>> #define ARCH_BITS 64
>> #define ARCH_BITS_LOG 6
>> #define ARCH_BITS_STR "64"
>> #define ARCH_LITTLE_ENDIAN 1
>> #define ARCH_INT_GT_32 0
>> #endif
>>
>> This might be wrong since we're cross-compiling. I doubt it's causing
>> trouble now, though, since the host system is almost certainly x86_64,
>> for which these settings just happen to be the same.
>>
>>> Next I want to figure out how those tests failed, but I have a few questions first: (forgive me if they look stupid...)
>>> 1. What exactly does it mean for a format to FAIL the test?
>>
>> See formats.c: fmt_self_test(). It's usually indicated after a call to
>> which of the format methods the test failed, but you'll most commonly
>> see get_hash[0](0) or something, which means that the actual failure was
>> likely in a preceding crypt_all() or set_key() or set_salt(). The test
>> vectors are in the tests[] array in each format's *_fmt*.c file.
>> In some cases, it's possible to narrow the problem down by temporarily
>> commenting out some of the test vectors. But usually not.
>>
>>> 2. There're two kind of numbers in the output, real and virtual. What's their difference?
>>
>> This is in the FAQ:
>>
>> Q: What are the "real" and "virtual" c/s rates as reported by "--test"
>> (on Unix-like operating systems)?
>> A: These correspond to real and virtual (processor) time, respectively.
>> The two results would differ when the system is under other load, with
>> the "virtual" c/s rate indicating roughly what you could expect to get
>> from the same machine if it were not loaded.
>>
>> ... but this FAQ entry is outdated and needs to be revised. As written,
>> it applies to single-threaded builds only (I wrote it before we
>> introduced OpenMP support). Clearly, the numbers also differ greatly in
>> multi-threaded builds. When running a multi-threaded build on an
>> otherwise idle system, the "real" speed will be roughly equal to the
>> "virtual" speed times the number of threads.
>>
>> Alexander
>
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