bpftrace script to attach to memcached and probe connections and commands

mcsnopp.bt

usdt::memcached:command__get,
usdt::memcached:command__set,
usdt::memcached:command__add,
usdt::memcached:command__replace,
usdt::memcached:command__prepend,
usdt::memcached:command__append,
usdt::memcached:command__cas
{
  @calls[str(arg1, arg2)]++;
  @bytes[str(arg1, arg2)]+= arg3;
}

usdt::memcached:command__incr,
usdt::memcached:command__decr,
usdt::memcached:command__delete
{
  @calls[str(arg1, arg2)]++;
}

usdt::memcached:conn__allocate
{
  @conns_allocated++;
}

usdt::memcached:conn__release
{
  @conns_released++;
}

usdt::memcached:conn__create
{
  @conns_created++;
}

usdt::memcached:conn__destroy
{
  @conns_destroyed++;
}

usdt::memcached:conn__dispatch
{
  @conns_dispatched++;
}