Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754728Ab3EVAQN (ORCPT ); Tue, 21 May 2013 20:16:13 -0400 Received: from gate.crashing.org ([63.228.1.57]:45523 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754666Ab3EVAQL (ORCPT ); Tue, 21 May 2013 20:16:11 -0400 Message-ID: <1369181713.6387.79.camel@pasglop> Subject: Re: [PATCH 0/3] Enable multiple MSI feature in pSeries From: Benjamin Herrenschmidt To: Alexander Gordeev Cc: Mike Qiu , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, tglx@linutronix.de Date: Wed, 22 May 2013 10:15:13 +1000 In-Reply-To: <20130521144548.GB21632@dhcp-26-207.brq.redhat.com> References: <1358235536-32741-1-git-send-email-qiudayu@linux.vnet.ibm.com> <20130521144548.GB21632@dhcp-26-207.brq.redhat.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.6.4-0ubuntu1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1720 Lines: 39 On Tue, 2013-05-21 at 16:45 +0200, Alexander Gordeev wrote: > 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? Yes. Each interrupt has its own affinity, whether it's an MSI or not, the affinity is not driven by the address. Cheers, Ben. > 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/