• Alexei Starovoitov's avatar
    samples/bpf: offwaketime example · a6ffe7b9
    Alexei Starovoitov authored
    This is simplified version of Brendan Gregg's offwaketime:
    This program shows kernel stack traces and task names that were blocked and
    "off-CPU", along with the stack traces and task names for the threads that woke
    them, and the total elapsed time from when they blocked to when they were woken
    up. The combined stacks, task names, and total time is summarized in kernel
    context for efficiency.
    
    Example:
    $ sudo ./offwaketime | flamegraph.pl > demo.svg
    Open demo.svg in the browser as FlameGraph visualization.
    Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    a6ffe7b9
offwaketime_kern.c 3.05 KB