> I am looking at the PRO/1000 linux base driver code. I just wondered what > is > the three timers---watchdog_timer, tx_fifo_stall_timer phy_info_timer--- > for. I'm not quite sure what info you're looking for, but here's a quick summary... Watchdog: This timer calls the watchdog routine which, for the most part, checks link state, updates the statistics, and checks for a transmitter hang. Tx FIFO Stall: This timer calls the e1000_82547_tx_fifo_stall routine which resets the hardware's FIFO pointers due to an issue with the 82547. Phy info: This timer calls e1000_phy_get_info to update the information on the phy. > They seems critical to the card interrupts. And what's their relationship > with the hardware implemented timers---absolute timers & packets timers? The watchdog timer triggers off of link status change and rx sequence error interrupts. Otherwise, it's set to call the watchdog routine every 2 seconds. The *IntDelay and *AbsIntDelay timers are explained pretty well in Documentation/networking/e1000.txt of your kernel source. Tuning these is an exercise left to the user, but the goal is to improve throughput and/or CPU utilization. Thanks, -Jeb - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
