Synchronous input/output measurement data

A computer program product, the computer program product comprising a computer readable storage medium having program instructions for acquiring measurement data of a synchronous input/output (I/O) link between an operating system and a recipient embodied therewith, the operating system and the recipient executing on a processor coupled to a memory, the program instructions executable by the processor to cause the processor to perform:

• monitoring operating system usage of synchronous I/O commands on the synchronous I/O link including identifying a plurality of operating systems using the synchronous I/O link,
• wherein the plurality of operating systems includes the operating system,
• wherein each of a plurality of operating systems is communicatively coupled to peripheral component interconnect function measurement block and corresponds to a separate logical partition of a synchronous system;
• storing the operating system usage in a measurement block as the measurement data,
• wherein the measurement block is accessed by the operating system to determine that the measurement data is acquired;
• and
• aggregating the operating system usage from the measurement block into a link measurement block,
• wherein the link measurement block comprises a peripheral component interconnect function measurement block for the synchronous I/O link that directly measures credentials of the synchronous I/O link by accumulating the measurement data related to each virtual function of each of the plurality of operating systems and the measurement data includes successful commands, processing time, local rejects, remote errors, bytes written, and bytes read for the synchronous I/O link.