When interfacing Simics, timing may in some cases pose a problem. For example, test programs may specify a timeout, but since Simics can run both faster and slower than real time, the test may either timeout when it should not, or not timeout when it actually should.
The time server solves this by exporting the virtual time ("Simics time") to the outer world. Clients can communicate with the time server through TCP/IP, using the time client library that provides a C-interface to the time server.
15.1 Time client library