1. A network-traffic monitoring system comprising: a data collecting instrument comprising: (a) an input coupled with an output network port of a processing device, the input configured to receive a destination address of each data packet transmitted from the output network port of the processing device, wherein the processing device is connected to a plurality of processing devices and wherein the processing device is configured to transmit data packets from output network ports of the processing device to other devices of the plurality of processing devices, (b) one or more address registers configured to store information about a destination address range, (c) a counter register configured to store a counter value, and (d) digital circuitry coupled with the input, the one or more address registers, and the counter register, the digital circuitry configured to: (I) determine, based on the information stored in the one or more address registers, that the destination address received at the input is within the destination address range, and (II) increment the counter value stored in the counter register; and a data processor communicatively coupled with the data collecting instrument and the plurality of processing devices, wherein the data processor is configured to: (i) provide to the input of the data collecting instrument a first address range as the destination address range, (ii) access the counter value stored in the counter register of the data collecting instrument, the counter value collected over a time interval while the plurality of processing devices performed operations in accordance with a distributed operation assignment, (iii) determine, based on the counter value, an adjustment to the distributed operation assignment, wherein the adjustment comprises reassigning at least some operations executed by one of the plurality of processing devices having a first address within the first address range to another one of the plurality of processing devices having a second address within a second address range, wherein a separation between a source port address and the second address range is smaller than a separation between the source port address and the first address range, and (iv) reassign, based on the determined adjustment, the at least some operations executed by the one of the plurality of processing devices.