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System—Packet Holding Message Blocks... 105
T1/E1 DACS Administrators’ Reference Guide 15 • System
• writeUserlpWanSystemUpload(498)—The monitor user can change all parameters—except passwords—
under authentication, drop-and-insert, dial-in, IP, T1/E1, Frame Relay, System, and System Log links. The
monitor user can also load firmware updates into the DACS.
System—Packet Holding Message Blocks...
The DACS system manages the i960 processor utilization by allocating message blocks for packet manage-
ment. This
Message Blocks window (see figure 37) indicates buffer usage of DACS message blocks based upon
message block sizes.
Figure 37. Packet Holding Message Blocks window
Buffer Size (boxbuffersize)
The size in bytes of the buffer.
No. of Buffers (boxbuffercount)
The total number of buffers this size.
No. Free (boxbuffersfree)
The number of buffers this size which are currently free for use
No. of Tasks Waited (boxCountBufferTaskWait)
The total number of times that the proper size message block was not available to hold a packet, and the CPU
task went to sleep while waiting for it.
No. of Times Unavailable(boxCountBufferUnavailable)
The total number of times that the proper size message block was not available to hold a packet, and the
CPU task dumped the packet. The difference between
Total Time Waited and Total Times Unavailable is
whether the CPU task goes to sleep or simply dumps the packet to continue on.