Eric Lee / smarc-ti-linux-kernel

23 Jun, 2013

1 commit

  • 0c4df02d7   x86: Add NMI duration tracepoints ... Browse Code ยป

    This patch has been invaluable in my adventures finding
    issues in the perf NMI handler. I'm as big a fan of
    printk() as anybody is, but using printk() in NMIs is
    deadly when they're happening frequently.

    Even hacking in trace_printk() ended up eating enough
    CPU to throw off some of the measurements I was making.

    Signed-off-by: Dave Hansen
    Acked-by: Peter Zijlstra
    Cc: paulus@samba.org
    Cc: acme@ghostprotocols.net
    Cc: Dave Hansen
    Signed-off-by: Ingo Molnar

    Dave Hansen