Defrag Tools (HD) - Channel 9

In a two part on-location special for Defrag Tools, Andrew Richards and Chad Beeder invade Larry Osterman's office on his 31st anniversary at Microsoft. Last week, we talked about his various office moves and the collection of artifacts in his office. This week we continue the visit and do a deep dive in to API Contracts. API Contracts are used to define and package the various Windows 10 SKUs for PC, Phone, HoloLens, Surface Hub, Xbox, IoT, etc. Resources:Larry Osterman's WeblogLarry Osterman on Channel 9

In a two part on-location special for Defrag Tools, Andrew Richards and Chad Beeder invade Larry Osterman's office on his 31st anniversary at Microsoft. This week, we talk about his various office moves and the collection of artifacts in his office. Next week we continue the visit and do a deep dive in to API Contracts. API Contracts are used to define and package the various Windows 10 SKUs for PC, Phone, HoloLens, Surface Hub, Xbox, IoT, etc. Resources:Larry Osterman's WeblogLarry Osterman on Channel 9

In this second episode of a two part series of Defrag Tools, Bill Messmer joins Andrew Richards and Chad Beeder to talk about the new 'dx' command in the Windows Debugger. Questions? Email us at [email protected]

In this two part series of Defrag Tools, Bill Messmer joins Andrew Richards and Chad Beeder to talk about the new 'dx' command in the Windows Debugger. Questions? Email us at [email protected]

In this episode of Defrag Tools, Andrew Richards and Chad Beeder use Debugging Tools for Windows (WinDbg) to debug some kernel mode memory dumps. We investigate a kernel mode crash (BSOD), and a system hang. [00:00] Introduction - kernel mode vs. user mode debugging[02:18] Dump #1: minidump of a Stop 0xD1 (DRIVER_IRQL_NOT_LESS_OR_EQUAL)[03:24] Start with !analyze -v[04:58] Debugger help has comprehensive list of bug check codes[07:45] Do a web search for the functions on the stack[08:58] Most likely this crash is fixed by KB 3055343[10:22] Dump #2: Manually-generated crash dump of a system hang, submitted by Channel 9 viewer Tom[11:22] Dump was forced via keyboard: Forcing a System Crash from the Keyboard[12:15] !process 0 0 to list all running processes[14:33] Andrew's funny story about diagnosing a server performance problem on a DEC Alpha cluster[16:17] !process [address] 17 to see all the threads in a process (including user mode stacks)[19:50] !thread with no parameters to see what was running on this CPU[23:58] ~0 to switch to see what was running on processor 0[24:44] A storport thread has been trying to acquire a spin lock for a long time. Introduction to Spin Locks[29:05] !locks shows someone is holding IopDeviceTreeLock and PiEnginelock - some thread is doing Plug & Play work - bus re-enumeration[31:53] lmvm to look at the storage driver - looks pretty old. Check for updates.[33:22] !devnode 0 1 shows the device tree[36:10] Questions? Email us at [email protected]