NAME

       libpfm_mips_74k - support for MIPS 74k processors

SYNOPSIS

       #include <perfmon/pfmlib.h>

       PMU name: mips_74k
       PMU desc: MIPS 74k

DESCRIPTION

       The library supports MIPS 74k processors in big or little endian modes.

ENCODINGS

       On  this  processor,  what  is  measured  by  an event depends on the event code and on the counter it is
       programmed on. Usually the meaning of the event code changes between odd and even indexed  counters.  For
       instance,  event  code  0x2  means 'PREDICTED_JR31' when programmed on even-indexed counters and it means
       'JR_31_MISPREDICTIONS' when programmed on odd-indexed counters. To correctly measure an event, one  needs
       both the event encoding and a list of possible counters.

       When  pfm_get_os_event_encoding()  is  used  with PFM_OS_NONE to return the raw PMU encoding, the library
       returns two values: the event encoding as per the architecture manual and a bitmask of valid counters  to
       program  it  on.  For instance, for 'JR_31_MISPREDICTIONS' The library returns codes[0] = 0x4a, codes[1]=
       0xa (supported on counter 1, 3).

       The encoding for a specific kernel interface may vary and is handled internally by the library.

MODIFIERS

       The following modifiers are supported on MIPS 74k.

       u      Measure at user level. This corresponds to PFM_PLM3.  This is a boolean modifier.

       k      Measure at kernel level. This corresponds to PFM_PLM0.  This is a boolean modifier.

       e      Measure at exception level. This corresponds to PFM_PLM2.  This is a boolean modifier.

       s      Measure at supervisor level. This corresponds to PFM_PLM1.  This is a boolean modifier.

              It should be noted that those modifiers are available for encoding as raw  mode  with  PFM_OS_NONE
              but they may not all be present with specific kernel interfaces.

AUTHORS

       Stephane Eranian <eranian@gmail.com>

                                                 September, 2011                                       LIBPFM(3)