• Carl Love's avatar
    powerpc/oprofile: IBM CELL: add SPU event profiling support · 88382329
    Carl Love authored
    This patch adds the SPU event based profiling funcitonality for the
    IBM Cell processor.  Previously, the CELL OProfile kernel code supported
    PPU event, PPU cycle profiling and SPU cycle profiling.   The addition of
    SPU event profiling allows the users to identify where in their SPU code
    various SPU evnets are occuring.  This should help users further identify
    issues with their code.  Note, SPU profiling has some limitations due to HW
    constraints.  Only one event at a time can be used for profiling and SPU event
    profiling must be time sliced across all of the SPUs in a node.
    
    The patch adds a new arch specific file to the OProfile file system. The
    file has bit 0 set to indicate that the kernel supports SPU event profiling.
    The user tool must check this file/bit to make sure the kernel supports
    SPU event profiling before trying to do SPU event profiling.  The user tool
    check is part of the user tool patch for SPU event profiling.
    Signed-off-by: default avatarCarl Love <carll@us.ibm.com>
    Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
    88382329
op_model_cell.c 49.4 KB