HWPREFS(1) BSD General Commands Manual HWPREFS(1)

NAME
     hhwwpprreeffss - inspect and control low-level system and processor parameters

SYNOPSIS
     hhwwpprreeffss [-vv] [-hh] [cpucount={1..N}] [cpuenable {1..N}] [cpudisable
             {1..N}] [cpul2cache={true, false}] [cpul3cache={true, false}]
             [cpunap={true, false}] [cpuhwprefetch={0, 4, 8}]
             [cpunopdsts={true, false}] [memctlreadbypass={true, false}]
             [osclass] [ostype] [machinetype] [memorysize] [cputype]
             [cpufreq] [cpubusfreq] [memctltype] [ioctltype"]

DESCRIPTION
     hhwwpprreeffss inspects and controls low-level system and processor parameters

     -vv       verbose mode

     -hh       display help message

     cpucount={1..N}
              number of processors available for use by MacOS X

     cpuenable {1..N}
              enable a specific processor

     cpudisable {1..N}
              disable a specific processor

     cpunap={true, false}
              processor nap

     cpul2cache={true, false}
              processor L2 cache

     cpul3cache={true, false}
              processor L3 cache

     cpuhwprefetch={0, 4, 8}
              prefetch engines used by hardware prefetcher (PPC970 only):

              0 - all prefetch engines disabled, DST instructions treated as
              NOPs

              4 - four automatic hardware prefetch engines, four used by DST
              instructions

              8 - eight automatic hardware prefetch engines, DST instructions
              treated as NOPs

     cpunopdsts={true, false}
              treat DST instructions as nops

     memctlreadbypass={true, false}
              memory controller (U3 only) read-bypass optimization (allows
              read commands to memory to bypass straight to read memory
              request queue, saving a significant number of cycles)

     osclass
              displays OS class {Cheetah, Puma, Jaguar, Smeagol, Panther,
              Tiger}

     ostype  displays operating system type

     machinetype
              displays machine type

     memorysize
              displays system memory

     cputype
              displays processor type and version

     cpufreq
              displays processor clock frequency

     cpubusfreq
              displays processor bus frequency

     memctltype
              displays memory controller type

     ioctltype
              displays io controller type

Darwin                         December 21, 2005                        Darwin