mellanox benchmark: use stats counters instead of querying HCA
mellanox benchmark: use stats counters instead of querying HCA

snabbco/snabb,eugeneia/snabb,snabbco/snabb,eugeneia/snabb,eugeneia/snabb,eugeneia/snabb,snabbco/snabb,eugeneia/snabb,eugeneia/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,snabbco/snabb