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Date: Sat, 6 Jul 2013 18:23:10 -0400
From: Yaniv Sapir <>
Subject: Re: Parallella: bcrypt


I think that I see some potential problem(s), but before getting into it,
can you please attach your build and run commands (scripts?). It is always
best to attach an SSCCE (

{ I am sorry if you already sent these previously, if so, I lost track of
it. }


On Sat, Jul 6, 2013 at 3:50 PM, Katja Malvoni <> wrote:

> Hi Yaniv,
> On Fri, Jul 5, 2013 at 5:59 AM, Yaniv Sapir <> wrote:
>> Katja,
>> From a quick glance at the attached *host *program you attached, I
>> spotted a couple of things that *may* be a problem:
>> [...]
> I tried all your suggestions and changed the code but it still doesn't
> work and it behaves strange. For example, different runs of program give
> different results because data is not transferred correctly. But cores that
> return wrong result are different for every run and it looks like it's
> random. Also, number of cores with correct result and correct data aren't
> always equal. There is no difference between busy wait and sleep(1) - same
> random things happen.
> I checked *.srec file and nothing is written on addresses I'm using. I'm
> not succeeding in finding a mistake and I can't figure out what is causing
> this behaviour.
> Something like this happens every time I make changes to working
> implementation and I've tried lot of things to make it work but usually
> every try fails. What can cause this type of behaviour? Am I very wrong in
> my approach because this is taking lot of my time and things that are
> happening don't make much sense?
> Thank you
> Katja

Yaniv Sapir
Adapteva Inc.
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Lexington, MA 02420
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