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Date: Fri, 8 Aug 2014 10:37:34 +0800 From: Jisheng Zhang <jszhang@...vell.com> To: Dmitry Popov <ixaphire@...tor.net> CC: "davem@...emloft.net" <davem@...emloft.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: Weird NET_RX softirq behavior Hi Dmitry, On Thu, 7 Aug 2014 07:18:13 -0700 Dmitry Popov <ixaphire@...tor.net> wrote: > On Thu, 7 Aug 2014 17:10:50 +0800 > Jisheng Zhang <jszhang@...vell.com> wrote: > > > 2. only one netdev in the system: eth0. > > There should also be lo (loopback) at least. Yep, I forget that ;) > > > 4. But NET_RX seems abnormal > > ~ # cat /proc/softirqs > > CPU0 CPU1 CPU2 CPU3 > > NET_RX: 445587 322 983 0 > > > > I'm expecting NET_RX under CPU1, 2, 3 should be zero. Any suggestions > > about this abnormal behavior? > > Do you have any loopback traffic? It could be handled by CPU1/2 explaining > non-zero NET_RX counters. Yes. lo only send and recive 7 packets so far, about 1400bytes. Seems small comparing with the CPU1 and CPU2 NET_RX softirq numbers, right? Any other possible case? Thanks for your reply, Jisheng -- 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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