On Mon, Sep 12, 2016 at 01:48:39PM +0530, Sreekanth Reddy wrote:
> On Thu, Sep 8, 2016 at 7:09 PM, Neil Horman wrote:
> > On Thu, Sep 08, 2016 at 11:12:40AM +0530, Sreekanth Reddy wrote:
> >> On Wed, Sep 7, 2016 at 6:54 PM, Neil Horman wrote:
> >> > On Wed, Sep 07, 2016 at 11:30:04AM +0530, Sreek
On Thu, Sep 8, 2016 at 7:09 PM, Neil Horman wrote:
> On Thu, Sep 08, 2016 at 11:12:40AM +0530, Sreekanth Reddy wrote:
>> On Wed, Sep 7, 2016 at 6:54 PM, Neil Horman wrote:
>> > On Wed, Sep 07, 2016 at 11:30:04AM +0530, Sreekanth Reddy wrote:
>> >> On Tue, Sep 6, 2016 at 8:36 PM, Neil Horman wrot
On Thu, Sep 08, 2016 at 11:12:40AM +0530, Sreekanth Reddy wrote:
> On Wed, Sep 7, 2016 at 6:54 PM, Neil Horman wrote:
> > On Wed, Sep 07, 2016 at 11:30:04AM +0530, Sreekanth Reddy wrote:
> >> On Tue, Sep 6, 2016 at 8:36 PM, Neil Horman wrote:
> >> > On Tue, Sep 06, 2016 at 04:52:37PM +0530, Sreek
On Wed, Sep 7, 2016 at 6:54 PM, Neil Horman wrote:
> On Wed, Sep 07, 2016 at 11:30:04AM +0530, Sreekanth Reddy wrote:
>> On Tue, Sep 6, 2016 at 8:36 PM, Neil Horman wrote:
>> > On Tue, Sep 06, 2016 at 04:52:37PM +0530, Sreekanth Reddy wrote:
>> >> On Fri, Sep 2, 2016 at 4:34 AM, Bart Van Assche
>
On Wed, Sep 07, 2016 at 11:30:04AM +0530, Sreekanth Reddy wrote:
> On Tue, Sep 6, 2016 at 8:36 PM, Neil Horman wrote:
> > On Tue, Sep 06, 2016 at 04:52:37PM +0530, Sreekanth Reddy wrote:
> >> On Fri, Sep 2, 2016 at 4:34 AM, Bart Van Assche
> >> wrote:
> >> > On 09/01/2016 03:31 AM, Sreekanth Redd
On Tue, Sep 06, 2016 at 04:52:37PM +0530, Sreekanth Reddy wrote:
> On Fri, Sep 2, 2016 at 4:34 AM, Bart Van Assche
> wrote:
> > On 09/01/2016 03:31 AM, Sreekanth Reddy wrote:
> >>
> >> I reduced the ISR workload by one third in-order to reduce the time
> >> that is spent per CPU in interrupt conte
On 09/01/2016 03:31 AM, Sreekanth Reddy wrote:
I reduced the ISR workload by one third in-order to reduce the time
that is spent per CPU in interrupt context, even then I am observing
softlockups.
As I mentioned before only same single CPU in the set of CPUs(enabled
in affinity_hint) is busy wit
On Fri, Aug 19, 2016 at 9:26 PM, Bart Van Assche
wrote:
> On 08/19/2016 04:44 AM, Sreekanth Reddy wrote:
>>
>> [ +0.000439] __blk_mq_run_hw_queue() finished after 10058 ms
>> [ ... ]
>> [ +0.05] [] ? finish_task_switch+0x6b/0x200
>> [ +0.06] [] __schedule+0x36c/0x950
>> [ +0.02]
ai; Sathya Prakash Veerichetty;
> Chaitra Basappa; Suganath Prabu Subramani
> Subject: RE: Observing Softlockup's while running heavy IOs
>
>
>
> > -Original Message-
> > From: Sreekanth Reddy [mailto:sreekanth.re...@broadcom.com]
> > Sent: Friday, August 19,
> -Original Message-
> From: Sreekanth Reddy [mailto:sreekanth.re...@broadcom.com]
> Sent: Friday, August 19, 2016 6:45 AM
> To: Elliott, Robert (Persistent Memory)
> Subject: Re: Observing Softlockup's while running heavy IOs
>
...
> Yes I am also observing t
On 08/19/2016 04:44 AM, Sreekanth Reddy wrote:
[ +0.000439] __blk_mq_run_hw_queue() finished after 10058 ms
[ ... ]
[ +0.05] [] ? finish_task_switch+0x6b/0x200
[ +0.06] [] __schedule+0x36c/0x950
[ +0.02] [] schedule+0x37/0x80
[ +0.06] [] futex_wait_queue_me+0xbc/0x120
[
n Fri, Aug 19, 2016 at 2:38 AM, Elliott, Robert (Persistent Memory)
wrote:
>
>
>> -Original Message-
>> From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel-
>> ow...@vger.kernel.org] On Behalf Of Sreekanth Reddy
>> Sent: Thursday, August 18, 2016 12:56
On 08/17/16 22:55, Sreekanth Reddy wrote:
> Observing softlockups while running heavy IOs on 8 SSD drives
> connected behind our LSI SAS 3004 HBA.
Hello Sreekanth,
This means that more than 23s was spent before the scheduler was
invoked, probably due to a loop. Can you give the attached (unteste
> -Original Message-
> From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel-
> ow...@vger.kernel.org] On Behalf Of Sreekanth Reddy
> Sent: Thursday, August 18, 2016 12:56 AM
> Subject: Observing Softlockup's while running heavy IOs
>
> Problem statemen
Hi,
Problem statement:
Observing softlockups while running heavy IOs on 8 SSD drives
connected behind our LSI SAS 3004 HBA.
System configuration:
OS & kernel version: Fedora 23, v4.2.3-300.fc23.x86_64
NUMA : disabled,
CPUs : 24 logical cpus,
SCSI_MQ: enabled
Driver : mpt3sas,
MSIx vectors: we ha
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