netdev - Re: [PATCH] pktgen: add a new sample script for 40G and above link testing

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Message-ID: <20170825165929.0d840ab2@redhat.com>
Date:   Fri, 25 Aug 2017 16:59:29 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     "Waskiewicz Jr, Peter" <peter.waskiewicz.jr@...el.com>
Cc:     "Hu, Robert" <robert.hu@...el.com>,
        "robert.hu@...ux.intel.com" <robert.hu@...ux.intel.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        brouer@...hat.com
Subject: Re: [PATCH] pktgen: add a new sample script for 40G and above link
 testing

On Fri, 25 Aug 2017 14:24:28 +0000
"Waskiewicz Jr, Peter" <peter.waskiewicz.jr@...el.com> wrote:

> On 8/25/17 5:19 AM, Jesper Dangaard Brouer wrote:
> >>
> >> Tested with Intel XL710 NIC with Cisco 3172 switch.
> >>
> >> It would be even slightly better if the irqbalance service is turned
> >> off outside.  
> > 
> > Yes, if you don't turn-off (kill) irqbalance it will move around the
> > IRQs behind your back...  
> 
> Or you can use the --banirq option to irqbalance to ignore your device's 
> interrupts as targets for balancing.

It might be worth mentioning that --banirq=X is specified for each IRQ
that you want to exclude, and --banirq is simply specified multiple
times on the command line.

Is it possible to tell a running irqbalance that I want to excluded an
extra IRQ? (just before I do my manual adjustment).

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer