Re: [PATCH net-next v4 0/5] Introduce NETIF_F_GRO_HW
From: Michael Chan <michael.chan@broadcom.com>
Date: 2017-12-14 18:36:13
On Thu, Dec 14, 2017 at 8:34 AM, Or Gerlitz [off-list ref] wrote:
On Mon, Dec 11, 2017 at 1:41 PM, Michael Chan [off-list ref] wrote:quoted
Introduce NETIF_F_GRO_HW feature flag and convert drivers that support hardware GRO to use the new flag.Hi Michael, Could you add more performance motivations/results? looking on your netconf slides [1] I see (much) better CPU utilization (slide 5) -- do you have more numbers to share?
The motivations are the same as LRO: to achieve higher RX throughput and lower CPU utilization. You can think of it as an improved version of LRO that is stricter and provides more information to construct the GRO frame so that it is reversible.
Or. [1] http://vger.kernel.org/netconf2017_files/hardware_gro.pdf