Am 11.12.2020 um 13:43 schrieb Sven Van Asbroeck: > Hi Heiner, > > On Thu, Dec 10, 2020 at 2:32 AM Heiner Kallweit <hkallwe...@gmail.com> wrote: >> >> >> In addition you could play with sysfs attributes >> /sys/class/net/<if>/gro_flush_timeout >> /sys/class/net/<if>/napi_defer_hard_irqs > > Interesting, I will look into that. > I run a 1Gbit chip with gro_flush_timeout = 20000 and napi_defer_hard_irqs = 1. This helped to reduce interrupt load significantly under iperf3 (w/o interrupt coalescing at chip level)
>>> @@ -2407,7 +2409,7 @@ static int lan743x_rx_open(struct lan743x_rx *rx) >>> >>> netif_napi_add(adapter->netdev, >>> &rx->napi, lan743x_rx_napi_poll, >>> - rx->ring_size - 1); >>> + 64); >> >> This value isn't completely arbitrary. >> Better use constant NAPI_POLL_WEIGHT. >> > > Thank you, I will change it in the next patch version. >
