linux-kernel - Re: [PATCH 0/3] Enable multiple MSI feature in pSeries

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Message-ID: <20130521144548.GB21632@dhcp-26-207.brq.redhat.com>
Date:	Tue, 21 May 2013 16:45:49 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Mike Qiu <qiudayu@...ux.vnet.ibm.com>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	benh@...nel.crashing.org, tglx@...utronix.de
Subject: Re: [PATCH 0/3] Enable multiple MSI feature in pSeries

On Tue, Jan 15, 2013 at 03:38:53PM +0800, Mike Qiu wrote:
> The test results is shown by 'cat /proc/interrups':
>           CPU0       CPU1       CPU2       CPU3       
> 16:     240458     261601     226310     200425      XICS Level     IPI
> 17:          0          0          0          0      XICS Level     RAS_EPOW
> 18:         10          0          3          2      XICS Level     hvc_console
> 19:     122182      28481      28527      28864      XICS Level     ibmvscsi
> 20:        506    7388226        108        118      XICS Level     eth0
> 21:          6          5          5          5      XICS Level     host1-0
> 22:        817        814        816        813      XICS Level     host1-1

Hi Mike,

I am curious if pSeries firmware allows changing affinity masks independently
for multiple MSIs? I.e. in your example, would it be possible to assign IRQ21
and IRQ22 to different CPUs?

Thanks!

> LOC:     398077     316725     231882     203049   Local timer interrupts
> SPU:       1659        919        961        903   Spurious interrupts
> CNT:          0          0          0          0   Performance
> monitoring interrupts
> MCE:          0          0          0          0   Machine check exceptions

-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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