2016 Cat System Workshop：Introduction to SkyPat

覺得 Performance test 是個痛苦的過程？想要知道特定程式碼的效能老是沒有辦法？就來看看 Peter 怎麼說！有興趣也可以前往：https://skypat.skymizer.com/ 了解更多噢！

Transcript

1. SkyPat C++ Performance Analysis & Testing Framework Peter Chang 2014/7/16 1
2. Compiler Optimization possibly generate Slower Incorrect code & 2
3. Compiler Developers on Regions of code require Preciseperformance evaluation need Correctnesschecking 3
4. An Unit-test framework for correctness checking SkyPat Leverages perf_event for precise evaluation 4
5. #include <pat/pat.h> // In MathCase, fibonacci_test PAT_F(MathCase, fibonacci_test) { ASSERT_TRUE(fibonacci(3) == 3); EXPECT_EQ(fibonacci(3), 3); PERFORM { fibonacci(3); } } A glace at SkyPat 5
6. #include <pat/pat.h> // In MathCase, fibonacci_test PAT_F(MathCase, fibonacci_test) { ASSERT_TRUE(fibonacci(3) == 3); EXPECT_EQ(fibonacci(3), 3); PERFORM { fibonacci(3); } } A glace at SkyPat 6
7. M M M T T T T T T T T T C C C Every casecontains multiple test-functions. Every test-function performs multiple evaluation macros. An evaluation macro could be either ASSERT, EXPECT, or PERFORM. 7
8. 8 Loop-Intensive program & Compiler engineers usually separate programs into two types Call-Intensive program
9. benefit Compiler Optimization Loop-Intensive programs 9
10. Damagecompiler optimization Call Intensive programs 10
11. Call intensive programs are Difficult to Evaluate. They need Precise Timer 11
12. 12 SkyPAT integrates “perf_event” to evaluate regions of code. “perf” cannotevaluate regions of code. “Software Task Clock” is still not cycle-accurate.
13. SkyPat welcome anyone to develop a “PMC” without interference from OS scheduler Only cycle-accurate timer w/o OS interference can evaluate call-intensiveprogram 13
14. 1. DownloadSkyPat from our website 2. Use build-script to build SkyPat 3. Write your test-case 4. Compileyour test-case 14 $ git clone https://code.google.com/p/pat/ $ ./pat/utils/build-script/build.sh [src folder] normal $ cd build-pat-normal; make install $ vim MathCase.cpp $ g++ -I/home/user/pat/include MathCase.cpp
15. 15 Build Software Better & Faster
16. 16 https://code.google.com/p/pat/