masked_flow_lookup.bt

#!/usr/bin/bpftrace

BEGIN
{
    printf("Tracing masked_flow_lookup... Hit Ctrl-C to end\n");
}

kprobe:masked_flow_lookup{
    @start[tid] = nsecs;
    @count++
}

kretprobe:masked_flow_lookup /@start[tid]/{
    $latency = nsecs - @start[tid];
    delete(@start[tid]);
    @lat = lhist($latency, 0, 2000, 100);
}

END
{
    printf("\nTotal masked_flow_lookup calls: %d", @count);
    clear(@start);
    clear(@count);
}