From: Jiang Liu <jiang.liu@linux.intel.com>
To: lkp@lists.01.org
Subject: Re: [x86/MSI] 52f518a3a7c: -30.5% netperf.Throughput_tps
Date: Tue, 16 Jun 2015 13:51:28 +0800 [thread overview]
Message-ID: <557FB960.9080202@linux.intel.com> (raw)
In-Reply-To: <1434433270.18774.203.camel@intel.com>
[-- Attachment #1: Type: text/plain, Size: 1081 bytes --]
On 2015/6/16 13:41, Huang Ying wrote:
> Hi, Gerry,
>
> On Tue, 2015-06-16 at 10:09 +0800, Jiang Liu wrote:
>> On 2015/6/16 1:52, Thomas Gleixner wrote:
>>> On Mon, 15 Jun 2015, Huang Ying wrote:
>> lkml.org/lkml/2015/6/1/80
>> The root cause is that, with hierarchy irqdomain enabled,
>> there are multiple irq_data associated with one irq. And function
>> irq_move_irq() on x86 uses a wrong copy of irq_data to check
>> whether there's pending irq migration operation. So all irq migration
>> /set_affinity operations will get pending for ever. This may
>> affect network performance due to interrupt load balance issue.
>> And the patch set posted at
>> www.gossamer-threads.com/lists/linux/kernel/2185533
>> should have solved all such regressions.
>
> Thanks for your information. Do you have a git tree for this patchset?
Hi Ying,
You may access the branch at:
https://github.com/jiangliu/linux test/irq_data_v3
or view at url:
https://github.com/jiangliu/linux/tree/test/irq_data_v3
Thanks!
Gerry
>
> Best Regards,
> Huang, Ying
>
>
WARNING: multiple messages have this Message-ID (diff)
From: Jiang Liu <jiang.liu@linux.intel.com>
To: Huang Ying <ying.huang@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>, LKP ML <lkp@01.org>
Subject: Re: [lkp] [x86/MSI] 52f518a3a7c: -30.5% netperf.Throughput_tps
Date: Tue, 16 Jun 2015 13:51:28 +0800 [thread overview]
Message-ID: <557FB960.9080202@linux.intel.com> (raw)
In-Reply-To: <1434433270.18774.203.camel@intel.com>
On 2015/6/16 13:41, Huang Ying wrote:
> Hi, Gerry,
>
> On Tue, 2015-06-16 at 10:09 +0800, Jiang Liu wrote:
>> On 2015/6/16 1:52, Thomas Gleixner wrote:
>>> On Mon, 15 Jun 2015, Huang Ying wrote:
>> lkml.org/lkml/2015/6/1/80
>> The root cause is that, with hierarchy irqdomain enabled,
>> there are multiple irq_data associated with one irq. And function
>> irq_move_irq() on x86 uses a wrong copy of irq_data to check
>> whether there's pending irq migration operation. So all irq migration
>> /set_affinity operations will get pending for ever. This may
>> affect network performance due to interrupt load balance issue.
>> And the patch set posted at
>> www.gossamer-threads.com/lists/linux/kernel/2185533
>> should have solved all such regressions.
>
> Thanks for your information. Do you have a git tree for this patchset?
Hi Ying,
You may access the branch at:
https://github.com/jiangliu/linux test/irq_data_v3
or view at url:
https://github.com/jiangliu/linux/tree/test/irq_data_v3
Thanks!
Gerry
>
> Best Regards,
> Huang, Ying
>
>
next prev parent reply other threads:[~2015-06-16 5:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-15 7:02 [x86/MSI] 52f518a3a7c: -30.5% netperf.Throughput_tps Huang Ying
2015-06-15 7:02 ` [lkp] " Huang Ying
2015-06-15 17:52 ` Thomas Gleixner
2015-06-15 17:52 ` [lkp] " Thomas Gleixner
2015-06-16 2:09 ` Jiang Liu
2015-06-16 2:09 ` [lkp] " Jiang Liu
2015-06-16 5:41 ` Huang Ying
2015-06-16 5:41 ` [lkp] " Huang Ying
2015-06-16 5:51 ` Jiang Liu [this message]
2015-06-16 5:51 ` Jiang Liu
2015-06-16 6:13 ` Thomas Gleixner
2015-06-16 6:13 ` [lkp] " Thomas Gleixner
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