Your message appeared before I could send my own. This could explain some things I was not aware of.
Hope I did not disrupt the meeting, as usual my audio had an echo. I usually copy vara.hamradio.net.ini to generic.ini and proceed. On 1/14/21 10:09 AM, Roland Haas wrote: > Hello David, > > since "hyperthreads" is an Intel concept AMD does not always use it > (plus there are flavors of the same concept eg on AMD's Bulldozer CPUs > there are 4 floating point units for 8 integer units, where we tend > to sometimes see benefits going to all 8 integer cores or at least > will do so on clusters since even a 5% speed increase "for free" is > worth it). > > Anyhow, if you can provide the output of lscpu on your system that will > explain things. > > Simfactory uses the "Core(s) per socket" and "Socket(s)" values to > compute the number of physical cores and hence the number of threads it > allows. The hyperthreads (or equivalent) would be "Thread(s) per core". > > Note that Wikipedia: > > https://en.wikipedia.org/wiki/List_of_AMD_FX_microprocessors#Bulldozer_Core_(Zambezi,_32_nm) > > does list your processors as 4 cores and 8 threads. > > I don't have access to your CPU but eg on a the Blue Waters login nodes > (Instanbul/Bulldozer, AMD Opteron(TM) Processor 6276) the output is: > > Architecture: x86_64 > CPU op-mode(s): 32-bit, 64-bit > Byte Order: Little Endian > CPU(s): 64 > On-line CPU(s) list: 0-63 > Thread(s) per core: 2 > Core(s) per socket: 8 > Socket(s): 4 > NUMA node(s): 8 > Vendor ID: AuthenticAMD > CPU family: 21 > Model: 1 > Model name: AMD Opteron(TM) Processor 6276 > > Yours, > Roland > _______________________________________________ Users mailing list [email protected] http://lists.einsteintoolkit.org/mailman/listinfo/users
