>>>>> "GBB" == Graeme B Bell <graeme.bell@xxxxxxxx> writes: GBB> 1a. For example AMD CPUs list the number of integer cores (e.g. 16), GBB> but there is actually only half as many cores available for floating GBB> point work (8). So if your functions need to use floating point, your GBB> scaling will suffer badly on FP functions. That is half as many 256-bit float units; for scalar math and for 128-bit vector math each core gets a half of the float unit. Only for the 256-bit vector math do the schedulars have to compete for float unit access. -JimC -- James Cloos <cloos@xxxxxxxxxxx> OpenPGP: 0x997A9F17ED7DAEA6 -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
