ACC Utilities Reference Guide

TTGEN - ZCOM System Table Generator
Creating the TTGEN Configuration File
Chapter 2 47
zbufnbr number of buffer entries (1-1M)
The maximum number of buffers available on the card. The size of each
buffer is determined by the zbufsize parameter. The default is ACC card
type dependent. For the Z7340A 8-channel PCI ACC, this parameter
should not be specified, as it will default to using all remaining free
memory for ACC buffers.
CAUTION The normal operation of the ACC card may be compromised if the
number of ACC buffers is too low. A warning message will be given by
zmon on starting up the ACC card if the number of ACC buffers available
is less than 8,000. This may have resulted from the user increasing
memory allocated to other ACC resources, or choosing a large buffer size
nheadnbr number of header entries (1-1M)
Determines the maximum number of messages and (depending on the
protocol in use) packets which can be simultaneously handled by the
ACC card. The default value of this parameter is ACC card type
dependent.
mquota quota of message headers allowed for each port (1-1M)
There is one pool of message headers on the ACC 8-channel PCI cards.
This parameter limits the number of message headers which can be used
by any port (Z7340A card) at any given moment. This parameter is used
to prevent one subchannel or port from monopolizing this critical card
resource. The default value for this parameter is ACC card dependent. A
low value for mquota will severely restrict normal operation of the ACC
card. Values of mquota below 1,000 should not be specified.
bquota quota of buffers allowed for each subchannel (1-1M)
There is one pool of buffers on the ACC card and this parameter limits
the number which can be used by any one subchannel at any moment.
This parameter prevents the traffic on one subchannel from consuming
more than its fair share of this limited card resource. The default value
for this parameter is ACC card dependent. A low value for bquota will
severely restrict normal operation of the ACC card. Values of bquota
below 2,000 should not be specified.