From: John Fastabend <john.fastabend@gmail.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>, netdev@vger.kernel.org
Cc: Daniel Borkmann <borkmann@iogearbox.net>
Subject: Re: [V3 PATCH net-next 0/5] xdp: more work on xdp tracepoints
Date: Thu, 24 Aug 2017 07:46:13 -0700 [thread overview]
Message-ID: <599EE6B5.7000605@gmail.com> (raw)
In-Reply-To: <150357074701.26663.4047992776649697788.stgit@firesoul>
On 08/24/2017 03:32 AM, Jesper Dangaard Brouer wrote:
> More work on streamlining and performance optimizing the tracepoints
> for XDP.
>
> I've created a simple xdp_monitor application that uses this
> tracepoint, and prints statistics. Available at github:
>
> https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_kern.c
> https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_user.c
>
> The improvement over tracepoint with strcpy: 9810372 - 8428762 = +1381610 pps faster
> - (1/9810372 - 1/8428762)*10^9 = -16.7 nanosec
> - 100-(8428762/9810372*100) = strcpy-trace is 14.08% slower
> - 981037/8428762*100 = removing strcpy made it 11.64% faster
>
> V3: Fix merge conflict with commit e4a8e817d3cb ("bpf: misc xdp redirect cleanups")
> V2: Change trace_xdp_redirect() to align with args of trace_xdp_exception()
>
> ---
Series looks good to me. Thanks a lot.
next prev parent reply other threads:[~2017-08-24 14:46 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-22 20:47 [PATCH net-next 0/5] xdp: more work on xdp tracepoints Jesper Dangaard Brouer
2017-08-22 20:47 ` [PATCH net-next 1/5] xdp: remove bpf_warn_invalid_xdp_redirect Jesper Dangaard Brouer
2017-08-22 21:19 ` Daniel Borkmann
2017-08-22 20:47 ` [PATCH net-next 2/5] xdp: make generic xdp redirect use tracepoint trace_xdp_redirect Jesper Dangaard Brouer
2017-08-22 21:21 ` Daniel Borkmann
2017-08-22 20:47 ` [PATCH net-next 3/5] ixgbe: use return codes from ndo_xdp_xmit that are distinguishable Jesper Dangaard Brouer
2017-08-22 21:21 ` Daniel Borkmann
2017-08-22 20:47 ` [PATCH net-next 4/5] xdp: remove net_device names from xdp_redirect tracepoint Jesper Dangaard Brouer
2017-08-22 21:23 ` Daniel Borkmann
2017-08-22 20:47 ` [PATCH net-next 5/5] xdp: get tracepoints xdp_exception and xdp_redirect in sync Jesper Dangaard Brouer
2017-08-22 21:30 ` Daniel Borkmann
2017-08-23 7:41 ` Jesper Dangaard Brouer
2017-08-23 8:54 ` Daniel Borkmann
2017-08-23 10:15 ` [V2 PATCH net-next 0/5] xdp: more work on xdp tracepoints Jesper Dangaard Brouer
2017-08-23 10:15 ` [V2 PATCH net-next 1/5] xdp: remove bpf_warn_invalid_xdp_redirect Jesper Dangaard Brouer
2017-08-23 10:15 ` [V2 PATCH net-next 2/5] xdp: make generic xdp redirect use tracepoint trace_xdp_redirect Jesper Dangaard Brouer
2017-08-23 10:15 ` [V2 PATCH net-next 3/5] ixgbe: use return codes from ndo_xdp_xmit that are distinguishable Jesper Dangaard Brouer
2017-08-23 10:15 ` [V2 PATCH net-next 4/5] xdp: remove net_device names from xdp_redirect tracepoint Jesper Dangaard Brouer
2017-08-23 10:58 ` Daniel Borkmann
2017-08-23 10:15 ` [V2 PATCH net-next 5/5] xdp: get tracepoints xdp_exception and xdp_redirect in sync Jesper Dangaard Brouer
2017-08-23 10:59 ` Daniel Borkmann
2017-08-23 11:16 ` [V2 PATCH net-next 0/5] xdp: more work on xdp tracepoints Jesper Dangaard Brouer
2017-08-24 0:07 ` David Miller
2017-08-24 10:32 ` [V3 " Jesper Dangaard Brouer
2017-08-24 10:33 ` [V3 PATCH net-next 1/5] xdp: remove bpf_warn_invalid_xdp_redirect Jesper Dangaard Brouer
2017-08-24 10:33 ` [V3 PATCH net-next 2/5] xdp: make generic xdp redirect use tracepoint trace_xdp_redirect Jesper Dangaard Brouer
2017-08-24 10:33 ` [V3 PATCH net-next 3/5] ixgbe: use return codes from ndo_xdp_xmit that are distinguishable Jesper Dangaard Brouer
2017-08-24 10:33 ` [V3 PATCH net-next 4/5] xdp: remove net_device names from xdp_redirect tracepoint Jesper Dangaard Brouer
2017-08-24 10:33 ` [V3 PATCH net-next 5/5] xdp: get tracepoints xdp_exception and xdp_redirect in sync Jesper Dangaard Brouer
2017-08-24 14:46 ` John Fastabend [this message]
2017-08-24 19:00 ` [V3 PATCH net-next 0/5] xdp: more work on xdp tracepoints David Miller
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