Pointless Blathering - All Comments

re: Measuring DPC time

karin — Thu, 28 Jul 2011 12:30:09 GMT

Cna someone help me? i need to check that in window of 10ms DPC duration is no more than 4ms

How can i check it in xperf?

re: Measuring DPC time

very high dpc user — Sat, 11 Jun 2011 12:48:06 GMT

i've done everything you suggested but in xperfview nothing is the same as on your screenshots. i got no exe's or any other program names but IDLE's. i just want to figure out what program causing high dpc latencies making my pc unusable....:(

re: Not sure where to post a question?

Prabhat Srivastava — Thu, 14 Apr 2011 06:40:18 GMT

I have an buisness requirement where Transparent window is supposed to handle the Mouse Events in VC++ MFC application. I am unable to capture the mouse event from the transparent window as events are passed to beneath windows. So is there any way through this can be achived in MFC Application.Reply will be highly appreciated.Please help in solving this issue.

Thanks

Prabhat

re: Measuring DPC time

Zhenghong Li — Wed, 09 Feb 2011 10:56:48 GMT

It's interesting but I wonder how it works. I wanna know how to get the cpu time slice of a given or some processes just because I'm working on a tiny project and I need to calculate the cpu usage of some processes periodically, are there any APIs/performance databases that would allow me to do this? Thanks in advance.

re: Measuring DPC time

Zhenghong Li — Wed, 09 Feb 2011 10:56:35 GMT

re: How to enable USB selective suspend and system wake in the UMDF driver for a USB device

abdulqader1 — Wed, 05 Jan 2011 08:37:48 GMT

Hi Peter,

I developed a UMDF driver with Winusb as a lower filter.The WDF version is 1.9.

I did all the steps as mentioned by you.But suspend is working for me.

Pls can you help?

Thanks

re: Not sure where to post a question?

Sumeet — Mon, 06 Dec 2010 11:53:08 GMT

Hi,

I have to develop a music player component in windows as well as in web without using any inbuilt component

so that it can be call from any language either .net or through any open source it should be like a web services

Which technology should i go for ?? .

Thanks

Sumeet

re: Measuring DPC time

dentaku — Sat, 09 Oct 2010 00:26:11 GMT

It took me a while to find exactly what to download and which components I needed/didn't need from the Microsoft Windows SDK v7.1 but I managed to install Xperf. I'm getting slightly long DPC latency after my computer has been on all day (it's fine at firs but gets worse after many hours) and it's affecting Ableton Live and other software that requires very low latency audio processing.

I guess now I need to let this machine run all night, run DPCLAT.EXE again and see if it's gotten worse then run XPerf again and analyse the log.

You're instructions are quite helpfull.

re: Pedantic Coder : Where do braces go?

Tim — Tue, 25 May 2010 20:25:38 GMT

Agree with this formating style, but with "else" I put it on the same line as the closing }.

"I'll remain a proponent of braces everywhere." Same here.

re: Not sure where to post a question?

Ewan Bingham — Sat, 07 Nov 2009 19:35:01 GMT

We make a device which uses a signed FTDI driver (we have some PIDS assigned to us, and are MS signed) and I want to find where to look to get help developing a driver which will launch my application when our driver is loaded. I see lots of stuff about launching application installers when a driver is installed. But I cannot see where to get the knowledge needed to get my app to launch when my device is connected, as opposed to first installed. I already use DiffX to install drivers with each app install. Any ideas as to where to look would be gratefully received.