Stampede2's Skylake (SKX) compute nodes each have 48 cores on two sockets (24 cores/socket).
See Best Known Practices… for more information. In most cases it's best to specify no more than 64-68 MPI tasks or independent processes per node, and 1-2 threads/core. But it may not be a good idea to use all 272 hardware threads simultaneously, and it's certainly not the first thing you should try.
Stampede2's Knights Landing (KNL) compute nodes each have 68 cores, and each core has 4 hardware threads.
The charge rate for the SKX queues remains at 1 SU.
In order to balance queue wait times, the charge rate for all KNL queues has been adjusted to 0.8 SUs per node-hour.
See Intel 18 to Become New Default Compiler on Stampede2 for more information. The Intel 17 compiler and software stack are still available to those who load the appropriate modules explicitly.
The Intel 18 compiler has replaced Intel 17 as the default compiler on Stampede2.
TACC Staff have put forth new file system and job submission guidelines.
All users: read Managing I/O on TACC Resources.
All users: refer to updated Remote Desktop Access instructions.
See ICX Compute Node specifications, new ICX job scripts, and the new icx-normal queue for more information. Hyperthreading is enabled: there are two hardware threads per core, for a total of 80 x 2 = 160 hardware threads per node. Each ICX processor has 80 cores on 2 sockets (40 cores/socket).
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