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GigMAC-PMC and PCI
GigPMC Switch Board and Driver Users Manual
DSS NETWORKS, INC. Version: 2.6 Page: 31
TUNING THE INSTALLATION
Interrupt holdoff (programmed latency)
To increase (or decrease) the value of the programmed interrupt latency, insert the
module and set the "IntrHoldOff" parameter as follows:
insmod ./dpm.o IntrHoldOff=1 # value can be 0, 1, 2 or 3
Note: A value greater than 3 is not recommended.
Other driver parameters that can be set during driver load or in modules.conf:
MediaSpeed=10,100,1000 # Media Speed (default 1000)
SetAutoNeg=0,1 # Setting for auto negotiation (default 1=auto)
DuplexMode=0,1 # Setting for duplex (default 1=FULL)
IntrHoldOff=0,1,2 # interrupt holdoff value in 100 microsecond
units
ChipSelector=0,1 # default=1 (Intel), 0=National
NumBufDescs=<cnt> # default=256, 128, 256, 512, 1024
MaxBufferSize=<size> # default=2048, 2048, 4096, 8192
FrameGenSize=<size> # frame generator test size (64-9000 bytes)
See “Command Line Parameters” table below for additional information on driver
module insertion parameters.