BGE(4) | NetBSD Kernel Interfaces Manual | BGE(4) |
Configuration of PHYs may also be necessary. See mii(4).
The BCM570x family supports IPv4/TCP/UDP checksumming in hardware. The bge driver supports this feature of the chip. See ifconfig(8) for information on how to enable this feature.
The level of interrupt mitigation for received packets can be adjusted with the hw.bge.rx_lvl sysctl(8) control. A value of 1 yields a bge interrrupt for every two full-sized Ethernet frames. Each increment of the value will, roughly, halve receive interrupt rate, up to a maximum of 5, which interrupts about every 30 to 40 full-sized TCP segments.
September 26, 2009 | NetBSD 5.99 |