Ntdebugging Blog

Here's one from the Rube Goldberg debug collection! The dripping sarcasm is because I'm about to show the reeeeally long way to figure out what's eating MmCm, skip down to the end if you are in a time crunch. Otherwise, do resist the temptation to skip Read More...

Debuggers, Here’s another short video of the type of triage possible with Xperf, this time Bob shows us how to track down a slow I/O issue. Since I/O Manager is instrumented at IoCallDriver and IoCompleteRequest we can often use this information to diagnose Read More...

Hi Debuggers, Here is a short video (6 min.) of how to root cause CPU consumption issues on Vista/Server 2008 and higher operating systems with Xperf. Download the video from the 'Attachement link' below. For this scenario, Xperf is an easy to implement Read More...

Xperf was created by the Windows Fundamentals team to analyze system and application performance. Tate walks through the use of the new tool and shows how to analyze the data for specific scenarios. The slide deck is available from the attachment link Read More...

Hi again! This is Tate from the CPR team and I’m going to show you how to debug a Server Service hang and the sometimes dreaded Event ID: 2021 and Event ID: 2022. There is much Voodoo about troubleshooting these two events but never fear, it’s possible Read More...

Hi again! Today I want to bring to your attention an upcoming series of posts on troubleshooting hangs and this post as a primer for understanding hangs and how we scope these scenarios. Scoping is a practice we use in troubleshooting that helps us to Read More...

Hi! My name is Tate. I’m an escalation engineer on the Microsoft Critical Problem Resolution Platforms Team. I wanted to share one of the most common errors we troubleshoot here on the CPR team, its root cause being pool consumption, and the methods by which we can remedy it quickly! This issue is commonly misdiagnosed, however, 90% of the time it is actually quite possible to determine the resolution quickly without any serious effort at all! Read More...