Specifications

System Software Diagnostics Guide — September 2006 115
23
23.MercMon Reference
This chapter provides reference information about the MercMon tool.The following topics are
included:
• Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
• Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
• Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
23.1 Description
MercMon provides counter information about DM3 board device drivers (Class Driver and
Protocol Drivers). These drivers maintain various counters that can aid in monitoring system
activities and interpreting system behaviors.
23.2 Guidelines
The MercMon tool provides counter information about a DM3 board’s class driver and protocol
driver. The following sections list the types of counters for each driver:
• Class Driver Counters
• Protocol Driver Counters
23.2.1 Class Driver Counters
This section provides details about the class driver counters that are used by the MercMon tool. The
class driver counters are as follows:
Note: All counters are on a per board basis except for FailMpathFind and FailStrmFind.
CompleteReads
returns the size (in bytes) of all the read requests completed by the protocol driver (i.e., the
actual size in KB of all the data read from the board)
CompleteSends
returns the size (in bytes) of all the messages sent to or received from the board
CompleteWrites
returns the size (in bytes) of all the write requests completed by the Protocol Driver (i.e., the
actual size in KB of all the data written to the board)
FailMpathFind
returns the number of times a request to get a message handle (Mpath) failed (global counter)
FailStrmFind
returns the number of times a request to get a stream handle failed (global counter)