Querying I/O Information

The intelligent prefetch user-mode program acache_client provides the function of obtaining I/O information.

1. Redirect I/O information to a file.

   acache_client -d > acache_client_trace

   The file contains the following information: op (I/O status), time, majorDev (primary device number), minorDev (secondary device number), offset (I/O address), and length (I/O length).