1. A parallel computer for acquiring remote shared variable directory (SVD) information, the parallel computer comprising a plurality of threads of execution, the threads organized into tasks, the parallel computer further comprising memory partitioned to provide each thread with a private memory and a shared memory, the parallel computer comprising computer processors operatively coupled to the memory having disposed within it computer program instructions that, when executed by the computer processors, cause the parallel computer to function by: determining, by a runtime optimizer of the parallel computer, that a first thread of a first task requires shared resource data stored in a memory partition of a remote SVD corresponding to a second thread of a second task; in response to determining that the first thread of the first task requires the shared resource data stored in the memory partition of the remote SVD corresponding to the second thread, requesting from the second thread, by the runtime optimizer, SVD information associated with the shared resource data; and receiving from the second thread, by the runtime optimizer, the SVD information associated with the shared resource data, the SVD information including an address indicating where the shared resource data is stored in the memory partition of the remote SVD corresponding to the second thread.