From: David Ahern <dsahern@gmail.com>
To: "Paweł Staszewski" <pstaszewski@itcare.pl>, netdev@vger.kernel.org
Subject: Re: Linux kernel - 5.4.0+ (net-next from 27.11.2019) routing/network performance
Date: Sun, 1 Dec 2019 09:05:57 -0700 [thread overview]
Message-ID: <589d2715-80ae-0478-7e31-342060519320@gmail.com> (raw)
In-Reply-To: <81ad4acf-c9b4-b2e8-d6b1-7e1245bce8a5@itcare.pl>
On 11/29/19 4:00 PM, Paweł Staszewski wrote:
> As always - each year i need to summarize network performance for
> routing applications like linux router on native Linux kernel (without
> xdp/dpdk/vpp etc) :)
>
Do you keep past profiles? How does this profile (and traffic rates)
compare to older kernels - e.g., 5.0 or 4.19?
> HW setup:
>
> Server (Supermicro SYS-1019P-WTR)
>
> 1x Intel 6146
>
> 2x Mellanox connect-x 5 (100G) (installed in two different x16 pcie
> gen3.1 slots)
>
> 6x 8GB DDR4 2666 (it really matters cause 100G is about 12.5GB/s of
> memory bandwidth one direction)
>
>
> And here it is:
>
> perf top at 72Gbit.s RX and 72Gbit/s TX (at same time)
>
> PerfTop: 91202 irqs/sec kernel:99.7% exact: 100.0% [4000Hz
> cycles:ppp], (all, 24 CPUs)
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>
> 7.56% [kernel] [k] __dev_queue_xmit
> 5.27% [kernel] [k] build_skb
> 4.41% [kernel] [k] rr_transmit
> 4.17% [kernel] [k] fib_table_lookup
> 3.83% [kernel] [k] mlx5e_skb_from_cqe_mpwrq_linear
> 3.30% [kernel] [k] mlx5e_sq_xmit
> 3.14% [kernel] [k] __netif_receive_skb_core
> 2.48% [kernel] [k] netif_skb_features
> 2.36% [kernel] [k] _raw_spin_trylock
> 2.27% [kernel] [k] dev_hard_start_xmit
next prev parent reply other threads:[~2019-12-01 16:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 22:00 Linux kernel - 5.4.0+ (net-next from 27.11.2019) routing/network performance Paweł Staszewski
2019-11-29 22:13 ` Paweł Staszewski
2019-12-01 16:05 ` David Ahern [this message]
2019-12-02 10:09 ` Paweł Staszewski
2019-12-02 10:53 ` Paolo Abeni
2019-12-02 16:23 ` Paweł Staszewski
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