• Madhavan Srinivasan's avatar
    powerpc/perf: Add Power8 mem_access event to sysfs · f2080b9a
    Madhavan Srinivasan authored
    Patch add "mem_access" event to sysfs. This as-is not a raw event
    supported by Power8 pmu. Instead, it is formed based on
    raw event encoding specificed in isa207-common.h.
    
    Primary PMU event used here is PM_MRK_INST_CMPL.
    This event tracks only the completed marked instructions.
    
    Random sampling mode (MMCRA[SM]) with Random Instruction
    Sampling (RIS) is enabled to mark type of instructions.
    
    With Random sampling in RLS mode with PM_MRK_INST_CMPL event,
    the LDST /DATA_SRC fields in SIER identifies the memory
    hierarchy level (eg: L1, L2 etc) statisfied a data-cache
    miss for a marked instruction.
    Signed-off-by: default avatarMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    f2080b9a
power8-pmu.c 9.71 KB