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Date: Mon, 23 Aug 2010 20:53:06 -0700 (PDT) From: David Miller <davem@...emloft.net> To: sanagi.koki@...fujitsu.com Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, kaneshige.kenji@...fujitsu.com, izumi.taku@...fujitsu.com, kosaki.motohiro@...fujitsu.com, nhorman@...driver.com, laijs@...fujitsu.com, scott.a.mcmillan@...el.com, rostedt@...dmis.org, eric.dumazet@...il.com, fweisbec@...il.com, mathieu.desnoyers@...ymtl.ca Subject: Re: [PATCH v4 4/5] skb: add tracepoints to freeing skb From: Koki Sanagi <sanagi.koki@...fujitsu.com> Date: Mon, 23 Aug 2010 18:46:12 +0900 > This patch adds tracepoint to consume_skb and add trace_kfree_skb before > __kfree_skb in skb_free_datagram_locked and net_tx_action. > Combinating with tracepoint on dev_hard_start_xmit, we can check how long it > takes to free transmited packets. And using it, we can calculate how many > packets driver had at that time. It is useful when a drop of transmited packet > is a problem. > > sshd-6828 [000] 112689.258154: consume_skb: skbaddr=f2d99bb8 > > Signed-off-by: Koki Sanagi <sanagi.koki@...fujitsu.com> Acked-by: David S. Miller <davem@...emloft.net> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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