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Message-ID: <1270456224.1971.15.camel@edumazet-laptop>
Date: Mon, 05 Apr 2010 10:30:24 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: Koki Sanagi <sanagi.koki@...fujitsu.com>
Cc: netdev@...r.kernel.org, izumi.taku@...fujitsu.com,
kaneshige.kenji@...fujitsu.com, davem@...emloft.net,
nhorman@...driver.com, jeffrey.t.kirsher@...el.com,
jesse.brandeburg@...el.com, bruce.w.allan@...el.com,
alexander.h.duyck@...el.com, peter.p.waskiewicz.jr@...el.com,
john.ronciak@...el.com
Subject: Re: [RFC PATCH 2/2] netdev: an usage example on igb
Le lundi 05 avril 2010 à 15:54 +0900, Koki Sanagi a écrit :
> This patch is usage example of previous patch's buffer on igb.
> The output is like below.
>
> # cat /sys/kernel/debug/ndrvbuf/igb-trace-0000\:03\:00.0/buffer
> [ 1] 50462.369207: clean_tx qidx=1 ntu=154->156
> [ 0] 50462.369241: clean_rx qidx=0 ntu=111->112
> [ 0] 50462.369250: xmit qidx=1 ntu=156->158
> [ 1] 50462.369256: clean_tx qidx=1 ntu=156->158
> [ 1] 50462.369342: clean_rx qidx=0 ntu=113->114
> [ 1] 50462.369439: clean_rx qidx=0 ntu=114->115
>
> This example outputs original print style, because it sets original print
> function(igb_trace_read) when registered.
>
> register_ndrvbuf(buname, 1000000, igb_trace_read);
>
> If you set NULL to arg3, outputs by ndrvbuf default style.
> If you set 0 to size(arg2), recording is disabled at first(but small buffer is
> alloced).
> When you set non-zero to size, recording becomes enabled.
>
> Signed-off-by: Koki Sanagi <sanagi.koki@...fujitsu.com>
> ---
> drivers/net/igb/Makefile | 2 +-
> drivers/net/igb/igb.h | 1 +
> drivers/net/igb/igb_main.c | 10 +++++-
> drivers/net/igb/igb_trace.c | 81 +++++++++++++++++++++++++++++++++++++++++++
> drivers/net/igb/igb_trace.h | 21 +++++++++++
> 5 files changed, 113 insertions(+), 2 deletions(-)
>
This depends on NDRVBUF, yet I see no Kconfig change in this patch.
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