A correlation manager correlates network traffic with corresponding file input/output activity. In some embodiments, a correlation manager filters both remote network traffic received by a kernel level fileserver and file input/output operations executed by the kernel level fileserver. The correlation manager correlates a thread requesting performance of a file input/output operation with a worker thread that performs the requested file input/output operation, and is thus able to correlate the remote request to perform the file input/output operation with the resulting performed file input/output operation itself. In some embodiments, the correlation manager correlates a transport driver interface thread requesting a file input/output operation with its corresponding system worker thread that implements the requested file input/output operation.