[wdmaudiodev] Re: Driver performance logging
- From: R T <ghk782000@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 23 Jun 2004 22:46:32 -0700 (PDT)
Thanks a lot Dan.
"Daniel E. Germann" <deg@xxxxxxxx> wrote:Hi, Ray.
I'm pretty sure the upper and lower bounds are in microseconds. So, 3143 of
the 3166 DPCs (or 99.27% of the DPCs) processed by PortCls during the trace
took between 10 and 25 usec to complete, and none of them took less than 5
usec or more than 50 usec.
-Dan
----- Original Message -----
> Date: Tue, 22 Jun 2004 00:40:57 -0700 (PDT)
> From: R T
> Subject: [wdmaudiodev] Driver performance logging
>
> Hi,
>
> I'm new to this list and wondering if anybody here happened to look into
logging an audio driver's performance with relation to this link:
> http://www.microsoft.com/whdc/driver/perform/mmdrv.mspx
>
> Following the instruction there on using tracelog and tracerpt on WinXP
SP2, I managed to get a log, which I attached an extract of it.
>
> Can anyone point out to me how to intepret Lower Bound and Upper Bound? It
seems to me it is a range of time it takes for a certain process to
complete. Is it in terms of microsec, msec?
>
> Any insights would be appreciated. Thanks.
>
>
> Ray.
>
>
>
> ---------------------------------
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>
> -- Attached file included as plaintext by Ecartis --
> -- File: report.txt
> -- Desc: report.txt
>
>
+---------------------------------------------------------------------------
--------------+
> | Distribution of portcls.sys (F28A0945) DPC execution times for the whole
trace |
>
+---------------------------------------------------------------------------
--------------+
> | Lower Bound Upper Bound Count Percent
|
>
+---------------------------------------------------------------------------
--------------+
> | 0 1 0 0.00%
|
> | 1 2 0 0.00%
|
> | 2 3 0 0.00%
|
> | 3 4 0 0.00%
|
> | 4 5 0 0.00%
|
> | 5 10 1 0.03%
|
> | 10 25 3143 99.27%
|
> | 25 50 22 0.69%
|
>
+---------------------------------------------------------------------------
--------------+
> | 3166 100.00%
|
>
+---------------------------------------------------------------------------
--------------+
>
>
> ------------------------------
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