Date: Sun, 7 Jul 2013 23:10:10 +0200 From: Katja Malvoni <kmalvoni@...il.com> To: john-dev@...ts.openwall.com Subject: Re: Parallella: bcrypt Hi Yaniv, I changed one thing in the code I sent in previous emails and now it works. I did something you recommended not to do - I used e_write and after it I used e_load_group(). Now both minimal and full code work. But I put it after e_writes to local memory. If I put e_load after writing to shared dram than it doesn't work. On the other hand, if it's before e_wirtes to core's local memory than data in local memory isn't correct for some of the cores. I got it working in one more way. If I start cores using e_start() after e_write() (attached code) than it also works. Can this happen because e_write() to core's local memory stalls, cores are started before data is ready and write to shared memory happened before write to local memory (although this doesn't explain how I get wrong data which is similar to correct data - something is written but not what I send from host, and it shouldn't be old data since e_reset_system is performed before writing anything)? And how are e_write() calls executed? Always in same order as invoked in code or there is difference between e_write() to shared memory and e_write() to core's local memory? Output.txt has output for minimal code, first one is what I get when executing code from minimal.zip, second one is what I get when putting e_load_group() after e_write() used to write hash to core's local memory. At the moment I'm not even thinking about performance, I just want to make it work when executed in a loop and the only approach that works with only one call to Epiphany doesn't work when there are multiple calls. Katja Content of type "text/html" skipped View attachment "output.txt" of type "text/plain" (3705 bytes) Download attachment "full_working.zip" of type "application/zip" (14567 bytes)
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