1. May 23-24, 2012 Microsoft

2. Решение проблем производительности приложений с использованием Visual Studio 11
MAXIM GOLDIN
Senior Developer at the VSU Diagnostics team Microsoft

3. Performance is important
How to improve it?
Measure
Fix
Measure again
How to measure it with VS?
VS Profiler

4. What is VS Profiler? Performance measurement tool Process oriented
Ultimate
Premium
Professional
Express

5. Common Performance Issue
High CPU utilization I/O bottleneck Tiers interaction Resource contention, Poor core utilization Memory issues

6. High CPU utilization Sampling: statistical form of CPU profiling
Choose Sampling when
CPU is the critical resource
Low overhead is required
Non-intrusive
Samples != Time

7. Sampling Profiling void Alpha() { Beta(); } void Beta() 30 samples
Exclusive
Inclusive
Alpha
Beta 30 80 50 50
50 samples

8. Sampling Profiling Call Tree
Call Stack
Main
Alpha
Beta
Main
Delta
Main
Alpha
Beta
Main
Alpha
Gamma

9. Sampling Profiling Call Tree

10. It is a Beta environment. You may see crushes and bugs.
Let’s mix something cool.
It is a Beta environment.
You may see crushes and bugs.
Experiment

11. Sampling Profiling
What my CPU is doing?
Demo

12. Common Performance Issue
High CPU utilization I/O bottleneck Tiers interaction Resource contention, Poor core utilization Memory issues

13. I/O bottleneck Instrumentation: method timing profiling
Choose Instrumentation when
CPU usage is low
Exact function call counts are necessary
Exact timing is necessary
Higher overhead
Intrusive
CPU usage is low is because: blocking is an issue (I/O, locks, sontext switches)

14. Instrumentation Profiling
void MyFunction() { FUNC_ENTER(MyFunction); CALL_ENTER(WriteFile); // Call another function WriteFile(...); CALL_EXIT(WriteFile); FUNC_EXIT(MyFunction); }
Elapsed Time
Application
Time
Mention that Instrumentation can be static (VSInstr.exe) or Dynamic (JavaScript, TIP, Detours)

15. Instrumentation Profiling Call Tree

16. How long the function takes?
Instrumentation Profiling
How long the function takes?
Demo

17. Common Performance Issue
High CPU utilization I/O bottleneck Tiers interaction Resource contention, Poor core utilization Memory issues

18. Tiers interaction Instrumentation based
ADO.NET calls
Addition to other profiling modes
Collects ADO.NET data
Duration and number of calls
Command text
VS Premium, VS Ultimate
CPU usage is low is because: blocking is an issue (I/O, locks, sontext switches)

19. Tiers Interaction Profiling (TIP)
Why my DB accesses slow?
Demo

20. Common Performance Issue
High CPU utilization I/O bottleneck Tiers interaction Resource contention, Poor core utilization Memory issues

21. Resource Contention Potential lock contention
void AddItems(Item[] items) void UseItems(Action<Item> doStuff) { { lock (_itemsLock) lock (_itemsLock) { { foreach (var item in items) foreach (var item in _items) _items.Add(item); doStuff(item); } } Thread 1 (producer) Thread 2 (consumer)

22. Where my synchronization blocks?
Contention Profiling
Where my synchronization blocks?
Demo

23. Common Performance Issue
High CPU utilization I/O bottleneck Tiers interaction Resource contention, Poor core utilization Memory issues

24. Managed memory profiling
Allocation data
Allocated type
Allocating call stack
Lifetime data
GC generations
CPU usage is low is because: blocking is an issue (I/O, locks, sontext switches)

25. Do I leak my memory? (if time permits)
Managed Memory Profiling
Do I leak my memory?
(if time permits)
Demo

26. More power to VS Profiler
Data collection
Remote profiling
ETW based collection
Various performance counters
Command line tools
APIs
Multiproc collection
Standalone profiler
Collect what you need
Attach/Detach, Pause/Resume

27. More power to VS Profiler
Data analysis/visualization
Filtering data
By time, thread, process
Compare results
Save analyzed file
Focus on important data
Just My Code (JMC)
Noise reduction

28. Available today at: http://vs11.ru
New version of Visual Studio!
Available today at:

29. Related Content

30. Пожалуйста Оцените доклад и мастерство докладчика.
Форма для оценки находится в вашем инфопакете.
Доклад - TLS307
Докладчик - Максим Гольдин