Hello:
This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@xxxxxxxxxx>:
On Fri, 26 May 2023 08:38:57 -0700 you wrote:
> The apc->eth_stats.rx_cqes is one per NIC (vport), and it's on the
> frequent and parallel code path of all queues. So, r/w into this
> single shared variable by many threads on different CPUs creates a
> lot caching and memory overhead, hence perf regression. And, it's
> not accurate due to the high volume concurrent r/w.
>
> For example, a workload is iperf with 128 threads, and with RPS
> enabled. We saw perf regression of 25% with the previous patch
> adding the counters. And this patch eliminates the regression.
>
> [...]
Here is the summary with links:
- [V3,net] net: mana: Fix perf regression: remove rx_cqes, tx_cqes counters
https://git.kernel.org/netdev/net/c/1919b39fc6ea
You are awesome, thank you!
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