User Guide NetXtreme II
January 2010
Broadcom Corporation
Document ENGSRVT52-CDUM100-R Driver Defaults Page 131
Note that Broadcom validation is limited to a power of 2; for example, 16, 32.
event_coal_div
"Event Coalescing Divide Factor", performance tuning parameter used to moderate the rate of interrupt generation by the
iscsi firmware.
Defaults: 1
Valid values: 1, 2, 4, 8
bnx2i_nopout_when_commands_active
"iSCSI NOOP even when connection is not idle", this parameter enables the offload initiator to send iSCSI NOP-OUT on
wire even when the link is not truly idle. This was introduced to avoid unnecessary session recoveries induced by some older
targets when iSCSI NOP-OUT and iSCSI CMD pdus are intermixed. Newer iSCSI target systems are immune to this
condition and this parameter is turned ON for quite some time.
Defaults: 1
Values: Binary parameter, 0/1
The parameters can also be set in modprobe.conf. See the man page for more information.
DRIVER DEFAULTS
• bnx2 Driver
• bnx2x Driver
BNX2 DRIVER
Speed: Autonegotiation with all speeds advertised
Flow Control: Autonegotiation with RX and TX advertised
MTU: 1500 (range is 46–9000)
RX Ring Size: 255 (range is 0–4080)
RX Jumbo Ring Size: 0 (range 0–16320) adjusted by the driver based on MTU and RX Ring Size
TX Ring Size: 255 (range is (MAX_SKB_FRAGS+1)–255). MAX_SKB_FRAGS varies on different kernels and different
architectures. On a 2.6 kernel for x86, MAX_SKB_FRAGS is 18.
Coalesce RX Microseconds: 18 (range is 0–1023)
Coalesce RX Microseconds IRQ: 18 (range is 0–1023)
Coalesce RX Frames: 6 (range is 0–255)
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