Date: Thu, 8 Sep 2016 13:00:14 +0200 From: Lukas Odzioba <lukas.odzioba@...il.com> To: john-dev@...ts.openwall.com Subject: Re: Intel KNL test machine 2016-09-08 6:03 GMT+02:00 Lei Zhang <zhanglei.april@...il.com>: > But KNL is a host CPU; it supports normal DDR and in > the meantime also has its own high-bandwidth memory, which is called > MCDRAM . DDR is the default; special functions are needed to > utilize MCDRAM. There will be also a card version later. MCDRAM is visible to OS as a separate NUMA node, so you can use it via $ numactl -m 1 ./john ... if KNL is in flat mode. If you can and want to modify the source code the simplest way is to use mmap/mbind syscalls to allocate memory. In BIOS you can set MCDRAM to cache mode where it will be direct mapped 16GB cache of your DDR. Thanks, Lukas
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