Difference Between Perf Data Reported by Different Tools – 4

maoniJanuary 12, 2007Jan 12, 200701/12/07

.NET CLR Memory\% Time in GC counter and !runaway on thread(s) doing GC. The 2 common ways people use to look at the time spent in GC are the % Time in GC performance counter under .NET CLR Memory, and the CPU time displayed by the !runaway debugger command in cdb/windbg. What do they mean exactly? % Time in GC is calculated like this: When ...

Difference Between Perf Data Reported by Different Tools – 3

maoniDecember 20, 2006Dec 20, 200612/20/06

Both the !SOS.gchandles command (added in CLR 2.0) and the .NET CLR Memory\# GC Handles counter show you the number of GC handles you have in your process. The # GC Handles counter is one of the rare counters in the .NET CLR Memory category that doesn’t get updated at the end of each GC. Rather we update it in the handle table code, for ...

Difference Between Perf Data Reported by Different Tools – 1

maoniDecember 12, 2006Dec 12, 200612/12/06

So, there are many perf tools and some of them report either the same or the same type of data. I want to talk about various differences between the ones related to managed heap investigation. This is not supposed to cover everything..just the ones I think people use frequently. Managed Heap Size We have both .NET CLR Memory perf counters and ...

My application seems to hang. What do I do? – Part 2

maoniNovember 14, 2006Nov 14, 200611/14/06

Last time I talked about the hang scenario where your process is taking 0 CPU and the CPU is taking by other process(es) on the same machine.   The next scenario is your process is taking 0 CPU and the CPU is barely used by other processes.   As one of the readers correctly pointed out, this is very likely because you have a ...