On the ASRock E350M1 I see slow data rates (<=10% of full rate) for incoming data transfers using the onboard gigabit NIC. There are kernel log messages like
r8169 0000:03:00.0: eth0: link up NOHZ: local_softirq_pending 08 repeated 10 times, followed by messages like net_ratelimit: 75 callbacks suppressed -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
