[nvmewin] Performance issue

[Santosh Singh]

Hi Kwok/Alex,

 

 

There is a  performance issue  in our OFA driver on  Windows 2012 and same
should be applicable to Windows 8.

In the NVMeFindAdapter() function , code specifically written for the
Windows 8 under the NTDDI_VERSION > NTDDI_WIN7 .

 

#if (NTDDI_VERSION > NTDDI_WIN7)

 

/* Ensure Storport allocates the DMA adapter object */

StorPortGetUncachedExtension(pAE, pPCI, 1);

 

#endif

 

After removing this code the performance on the multi core system increases
2 times  on window 2k12 ,

and removing the 1 Byte allocation does not have any side effect on the
driver functionality.

 

As per the Storport  documentation   the StorPortGetUncachedExtension
routine allocates an uncached common 

buffer to be shared by the CPU and the device. Not sure but my best guess is
that  buffer sharing among CPUs could

be a reason of low performance.

 

Can we add this in  the known issue.

 

Regards

Santosh

 

 

 

 

-----Original Appointment-----

From: nvmewin-bounces at lists.openfabrics.org
[mailto:nvmewin-bounces at lists.openfabrics.org] On Behalf Of Kwok Kong

Sent: Saturday, November 16, 2013 5:33 AM

To: nvmewin at lists.openfabrics.org

Subject: [nvmewin] Quarterly Status meeting

When: Monday, November 25, 2013 1:00 PM-2:00 PM (UTC-08:00) Pacific Time (US
& Canada).

Where: Live Meeting

 

 

When: Monday, November 25, 2013 1:00 PM-2:00 PM (UTC-08:00) Pacific Time (US
& Canada).

Where: Live Meeting

 

Note: The GMT offset above does not reflect daylight saving time
adjustments.

 

*~*~*~*~*~*~*~*~*~*

 

Agenda:

 

 

 

. Review 1.3 release plan

 

 

. Windows 32-bit support

. Windows 8 extended SRB support

. NVM format state machine enhancement

. End to end protection support

. Hibernation

 

 

. Known issues

 

 

. - Not handling CSTS.RDY status (from 1->0 and 0->1) properly on NVMe
reset. (Judy - Samsung)

. NUMA group support in core enumeration

. Controller reset does not handle all cases

. Learning of CPU core to Vector failure handling

. Core-MSI vector queue mapping issues

 

 

 

 

. Discuss plan for 2014

 

 

 

 

. Features that will not be supported in 2013

. ===========================================

.  

. NVMe 1.1 support:

. - multi-path

. - SGL 

. - Get/Set feature update

.         - Autonomous power state transition

.         - Host Identifier

.         - Reservation Notification Mask

.         - Reservation Persistence

. - identify structure update 

. - write zeros command

.   

 

Next Meeting

 

 

Please let me know if you would like to add any items to the agenda.

 

-Kwok

 

 

 

 

-+-----+-----+-----+-----+-----+-----+-----+-----+-

 

 

Kwok Kong has invited you to attend an online meeting using MicrosoftR
Office Communications Server.

Join the meeting

 

Make sure the Office Live Meeting client is installed before the meeting:

 

 

. I am connecting from inside the PMC-Sierra network

. I am connecting from outside the PMC-Sierra network

 

AUDIO INFORMATION 

To join a meeting from your phone, dial in using the following information:

        Phone:  Burnaby Ext 6026 [English, French]

        Phone:  +1 (888) 828-7722 [English, Spanish, French]

        Phone:  +1 (604) 415-6026 [English, French]

        Find a local phone number for your region

 

        Conference ID:  8339027

        Passcode:       Passcode is not required.

        Note: If you have an account on this corporate network, use your PIN
to join. Have you set your PIN?

TROUBLESHOOTING 

Unable to join the meeting?  Start Office Live Meeting and join the meeting
with the following information:

        Meeting ID:     bd6164cdeb094e6492ca14408eca1dd3

        Entry Code:     8246

        Location:
meet:sip:kwok.kong at pmcs.com;gruu;opaque=app:conf:focus:id:bd6164cdeb094e6492
ca14408eca1dd3%3Fconf-key=8246

 

If you still cannot enter the meeting, contact support:

 

. Inside the PMC-Sierra network

. Outside the PMC-Sierra network

 

NOTICE 

Office Live Meeting can be used to record meetings. By participating in this
meeting, you agree that your communications may be monitored or recorded at
any time during the meeting.

 

 

  << File: Untitled attachment 00195.txt >> 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openfabrics.org/pipermail/nvmewin/attachments/20131122/6176dfb4/attachment.html>