Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Tejas_K_
Beginner
115 Views

Driver performance reduces from W2008 server to Win 2012 Server

I have the proprietary driver which I run on Win 2008 Server and on Win 2012 Server. When the Que-depth is increased from 64 to 256 there is no reduction in performance on Win 2008 but reduces considerably on Win 2012. Vtune analysis on both systems give prettymuch the same results.

0 Kudos
13 Replies
Bernard
Black Belt
115 Views

What are the symptoms of reduced performance?

Tejas_K_
Beginner
115 Views

When the Que-depth is 64  the driver performs about 720K I/Os per second

and when Que depth is increased to 256 there is a  reduction to 620K I/Os per second

Vtune indicated some functions which is taking time,even after ixing them it is still performing bad.

Bernard
Black Belt
115 Views

At the beginning try to double check driver performance with Xperf.

Bernard
Black Belt
115 Views

You can also try kernrate.

Tejas_K_
Beginner
115 Views

I am using IOMeter , But shall try with Xperf

Bernard
Black Belt
115 Views

Xperf will give you a call stack info also.

Tejas_K_
Beginner
115 Views

Is there a good Xpef tuorial you would want to suggest , The ones I am looking into are not all that helpful

Bernard
Black Belt
115 Views

Tejas_K_
Beginner
115 Views

Thank you!

Bernard
Black Belt
115 Views

@Tejas

Do you have any results?

Vitaly_S_Intel
Employee
115 Views

BTW, have you tried General Exploration analysis in VTune? It may highlight some HW issues (look to red cells).

iliyapolak, can you please share your thoughts which useful XPerf features are missing in VTune?

Tejas_K_
Beginner
115 Views

@iliyapolak , Yes Xperf was useful , made some changes and was effective. Thank you!

Bernard
Black Belt
115 Views

I think that Xperf models or measures betters Win OS environment and its interaction with the software,although it is not probably the main purpose of the VTune.

For example time CPU spent in DPC routine.

Reply