• Robert Richter's avatar
    oprofile: Remove 'WQ on CPUx, prefer CPUy' warning · 61bccf19
    Robert Richter authored
    Under certain workloads we see the following warnings:
    
     WQ on CPU0, prefer CPU1
     WQ on CPU0, prefer CPU2
     WQ on CPU0, prefer CPU3
    
    It warns the user that the wq to access a per-cpu buffers runs not on
    the same cpu. This happens if the wq is rescheduled on a different cpu
    than where the buffer is located. This was probably implemented to
    detect performance issues. Not sure if there actually is one as the
    buffers are copied to a single buffer anyway which should be the
    actual bottleneck.
    
    We wont change WQ implementation. Since a user can do nothing the
    warning is pointless. Removing it.
    
    Cc: Andi Kleen <andi@firstfloor.org>
    Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
    61bccf19
cpu_buffer.c 10.6 KB