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Parallella Community Supercomputing for Everyone 2015-02-23T12:34:56+00:00 https://parallella.org/forums/feed.php?f=23&t=2114 2015-02-23T12:34:56+00:00 2015-02-23T12:34:56+00:00 https://parallella.org/forums/viewtopic.php?t=2114&p=12748#p12748 <![CDATA[Re: Can Epiphany III core be blocked from writing to host me]]> Statistics: Posted by timpart — Mon Feb 23, 2015 12:34 pm


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2015-01-29T11:10:21+00:00 2015-01-29T11:10:21+00:00 https://parallella.org/forums/viewtopic.php?t=2114&p=12515#p12515 <![CDATA[Re: Can Epiphany III core be blocked from writing to host me]]> Statistics: Posted by rowan194 — Thu Jan 29, 2015 11:10 am


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2015-01-29T09:25:42+00:00 2015-01-29T09:25:42+00:00 https://parallella.org/forums/viewtopic.php?t=2114&p=12511#p12511 <![CDATA[Re: Can Epiphany III core be blocked from writing to host me]]> Currently that is limited to the top 32MB of the 1GB Host memory and refered to as 'shared memory'.
That is policed by the piece of "magical" address translation refered to by Andreas at .
Any attempt at addressing outside that 32MB mapped area ends up on the north, south or west elink interfaces (i.e. thin air) or undefined (which is probably where your worries start).

Cheers

Statistics: Posted by greytery — Thu Jan 29, 2015 9:25 am


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2015-01-28T21:33:37+00:00 2015-01-28T21:33:37+00:00 https://parallella.org/forums/viewtopic.php?t=2114&p=12504#p12504 <![CDATA[Can Epiphany III core be blocked from writing to host mem?]]>
I want to experiment with free-for-all execution, where each core basically starts with binary junk, and through successive empirical testing eventually evolve their machine code to do something useful, but this is risky if a core happens to execute a series of instructions that write to host memory. If this happens, the whole board could lock up, or even worse, go unstable via subtle corruption. It needs to be protected because each core is executing random code.

tl;dr is there any way to prevent cores from writing to the host memory on the Parallella with Epiphany III?

Statistics: Posted by rowan194 — Wed Jan 28, 2015 9:33 pm


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