NAME

       likwid-features  -  print  and toggle the flags of the MSR_IA32_MISC_ENABLE model specific
       register

SYNOPSIS

       likwid-features [-vh] [-c <coreId>] [-s <prefetcher_tag>] [-u <prefetcher_tag>]

DESCRIPTION

       likwid-features is a command line application to print the flags  in  the  model  specific
       register (MSR) MSR_IA32_MISC_ENABLE on Intel x86 processors. On Core2 processors it can be
       used to toggle the hardware prefetch flags. It does not work on  AMD  processors.   For  a
       documentation  what  flags  are  supported  on which processor refer to the Intel Software
       Developer's Manual Volume 3B, Table B.2. The MSR are set individually for every core.  The
       following hardware prefetchers can be toggled:

       •      HW_PREFETCHER: Hardware prefetcher.

       •      CL_PREFETCHER: Adjacent cache line prefetcher.

       •      DCU_PREFETCHER:  When  the DCU prefetcher detects multiple loads from the same line
              done within a time limit,  the  DCU  prefetcher  assumes  the  next  line  will  be
              required. The next line is prefetched in to the L1 data cache from memory or L2.

       •      IP_PREFETCHER:  The IP prefetcher is an L1 data cache prefetcher. The IP prefetcher
              looks for sequential load  history  to  determine  whether  to  prefetch  the  next
              expected data into the L1 cache from memory or L2.

OPTIONS

       -v     prints version information to standard output, then exits.

       -h     prints a help message to standard output, then exits.

       -c  <coreId>
              set on which processor core the MSR should be read

       -u  <HW_PREFETCHER | CL_PREFETCHER | DCU_PREFETCHER | IP_PREFETCHER>
              specify which prefetcher to unset

       -s  <HW_PREFETCHER | CL_PREFETCHER | DCU_PREFETCHER | IP_PREFETCHER>
              specify which prefetcher to set

AUTHOR

       Written by Jan Treibig <jan.treibig@gmail.com>.

BUGS

       Report Bugs on <http://code.google.com/p/likwid/issues/list>.

SEE ALSO

       likwid-perfctr(1),   likwid-pin(1),   likwid-powermeter(1),   likwid-topology(1),  likwid-
       setFrequencies(1)