Performance Analysis with Vampir VIRTUAL INSTITUTE HIGH PRODUCTIVITY SUPERCOMPUTING

Transcription

1 Performance Analysis with Vampir

2 Outline Part I: Welcome to the Vampir Tool Suite Event Trace Visualization Vampir & VampirServer The Vampir Displays Part II: Vampir Hands-On Visualizing and analyzing NPB-MZ-MPI / BT SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 2

3 Event Trace Visualization with Vampir Alternative and supplement to automatic analysis Show dynamic run-time behavior graphically at any level of detail Provide statistics and performance metrics Timeline charts Show application activities and communication along a time axis Summary charts Provide quantitative results for the currently selected time interval SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 3

4 Visualization Modes (1) Directly on front end or local machine % vampir Core Core Core Core Multi-Core Program Core Core Core Core Score-P Trace File Vampir Small/Medium sized trace Thread parallel SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 4

5 Visualization Modes (2) On local machine with remote VampirServer % vampirserver start % vampir VampirServer Vampir CPU CPU CPU CPU CPU CPU CPU CPU Core Core Core Core LAN/WAN CPU CPU CPU CPU CPU CPU CPU CPU Core Core Core Core Many-Core CPU CPU CPU CPU CPU CPU Program CPU CPU Core Core Core Core Score-P Trace File Large Trace File (stays on remote machine) CPU CPU CPU CPU CPU CPU CPU CPU Core Core Core Core Parallel application SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 5

6 The main displays of Vampir Timeline Charts: Master Timeline Process Timeline Counter Data Timeline Performance Radar Summary Charts: Function Summary Message Summary Process Summary Communication Matrix View SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 6

7 Hands-on: Visualizing and analyzing NPB-MZ-MPI / BT

8 Help! Where is my trace file? % ls $HOME/NPB3.3-MZ-MPI/bin.scorep/scorep_bt-mz_trace profile.cubex scorep.cfg traces/ traces.def traces.otf2 If you followed the Score- P hands-on up to the trace experiment % ls /usr/local/speedup/scorep_bt-mz_trace profile.cubex scorep.cfg traces/ traces.def traces.otf2 If you did not follow to that point, take a prepared trace SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 8

9 Starting Vampir on MiniHPC Start Vampir on MiniHPC, if you followed the Score-P hands-on % vampir $HOME/NPB3.3-MZ-MPI/bin.scorep/scorep_bt-mz_trace/traces.otf2 Start Vampir on MiniHPC, if you did not follow to that point % vampir /usr/local/speedup/scorep_bt-mz_trace/traces.otf2 SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 9

10 Starting VampirServer on MiniHPC % vampirserver start Launching VampirServer... Submitting batch job (this might take a while)... Start VampirServer on MiniHPC SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 10

11 Starting VampirServer on MiniHPC % vampirserver start Launching VampirServer... Submitting batch job (this might take a while)... VampirServer (r10418) Licensed to Universitaet Basel Running 4 analysis processes... (abort with \ vampirserver stop 28974) VampirServer <28974> listens on: \ dmi-cl-login.dmi.p.unibas.ch:30004 Start VampirServer on MiniHPC Copy host:port SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 11

12 Start Vampir % ssh -N -L 30000: dmi-cl-login.dmi.p.unibas.ch:30004 \ dmi-cl-login.dmi.unibas.ch Open a port forwarding to Stampede to be able to access the VampirServer host:port from VampirServer output SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 12

13 Start Vampir on local computer SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 13

14 Use the Open Other option SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 14

15 Select Remote File SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 15

16 Server is localhost Port is Connection type Socket SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 16

17 SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 17

18 Visualization of the NPB-MZ-MPI / BT trace Navigation Toolbar Function Summary Master Timeline Function Legend SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 18

19 Visualization of the NPB-MZ-MPI / BT trace Master Timeline Detailed information about functions, communication and synchronization events for collection of processes. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 19

20 Visualization of the NPB-MZ-MPI / BT trace Process Timeline Detailed information about different levels of function calls in a stacked bar chart for an individual process. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 20

21 Visualization of the NPB-MZ-MPI / BT trace Typical program phases Initialisation Phase Computation Phase SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 21

22 Visualization of the NPB-MZ-MPI / BT trace Counter Data Timeline Detailed counter information over time for an individual process. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 22

23 Visualization of the NPB-MZ-MPI / BT trace Performance Radar Detailed counter information over time for a collection of processes. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 23

24 Visualization of the NPB-MZ-MPI / BT trace Zoom in: Inititialisation Phase Context View: Detailed information about function initialize_. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 24

25 Visualization of the NPB-MZ-MPI / BT trace Find Function Execution of function initialize_ results in higher page fault rates. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 25

26 Visualization of the NPB-MZ-MPI / BT trace Computation Phase Computation phase results in higher floating point operations. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 26

27 Visualization of the NPB-MZ-MPI / BT trace Zoom in: Computation Phase MPI communication results in lower floating point operations. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 27

28 Visualization of the NPB-MZ-MPI / BT trace Zoom in: Finalisation Phase Early reduce bottleneck. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 28

29 Visualization of the NPB-MZ-MPI / BT trace Process Summary Function Summary: Overview of the accumulated information across all functions and for a collection of processes. Process Summary: Overview of the accumulated information across all functions and for every process independently. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 29

30 Visualization of the NPB-MZ-MPI / BT trace Process Summary Find groups of similar processes and threads by using summarized function information. SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 30

31 Summary and Conclusion

32 Summary Vampir & VampirServer Interactive trace visualization and analysis Intuitive browsing and zooming Scalable to large trace data sizes (20 TiByte) Scalable to high parallelism (200,000 processes) Vampir for Linux, Windows, and Mac OS X SPEEDUP 16 TUTORIAL: PERFORMANCE AND ENERGY MONITORING AND ANALYSIS (BASEL, SWITZERLAND, SEPTEMBER 16, 2016) 32

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