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User Guide NetXtreme II
January 2010
Broadcom Corporation
Document ENGSRVT52-CDUM100-R Setting Values for Optional Properties Page 129
BNX2X DRIVER
disable_tpa
The disable_tpa parameter can be supplied as a command line argument to disable the Transparent Packet Aggregation
(TPA) feature. By default, the driver will aggregate TCP packets. Use disable_tpa to disable the advanced TPA feature.
Set the disable_tpa parameter to 1 as shown below to disable the TPA feature on all NetXtreme II network adapters in the
system. The parameter can also be set in modprobe.conf. See the man page for more information.
insmod bnx2x.ko disable_tpa=1
or
modprobe bnx2x disable_tpa=1
int_mode
The int_mode parameter is used to force using an interrupt mode.
Set the int_mode parameter to 1 to force using the legacy INTx mode on all NetXtreme II adapters in the system.
insmod bnx2x.ko int_mode=1
or
modprobe bnx2x int_mode=1
Set the int_mode parameter to 2 to force using MSI mode on all NetXtreme II adapters in the system.
insmod bnx2x.ko int_mode=2
or
modprobe bnx2x int_mode=2
Set the int_mode parameter to 3 to force using MSI-X mode on all NetXtreme II adapters in the system.
dropless_fc
The dropless_fc parameter can be used to enable a complementary flow control mechanism on BCM57711 adapters. The
default flow control mechanism is to send pause frames when the on-chip buffer (BRB) is reaching a certain level of
occupancy. This is a performance targeted flow control mechanism. On BCM57711 adapters, one can enable another flow
control mechanism to send pause frames, where one of the host buffers (when in RSS mode) are exhausted.
This is a "zero packet drop" targeted flow control mechanism.
Set the dropless_fc parameter to 1 to enable the dropless flow control mechanism feature on all BCM57711 NetXtreme II
adapters in the system.
insmod bnx2x.ko dropless_fc=1
or
modprobe bnx2x dropless_fc=1