GPU621/Striking

Striking

Our project: Debugging Threads in Intel Parallel Studio

Group Members

1. Eunju Han [1] Research etc.
2. Lei(Eric) Zhang [2] (Dropped the course) Research etc.

Progress

Oct 17th:

1. Picked topic
2. Picked presentation date.

Oct 20th:

1. Created Wiki page

Nov 6th - 13th:

• There are great resources about Intel Parallel Debugger Extension for Microsoft Visual Studio like below.

1. Debugging Threads in Intel Parallel Studio - [Dr. Dobbs Article]
2. Intel® Parallel Debugger Extension, Added Aug 2, 2012 - [[3]]
3. Intel Parallel Composer Parallel Debugger Extension Tutorial - [Mittie Sylvian's Video]

However, Intel Parallel Debugger Extension has been deprecated from the version Intel Composer XE 2013 at the end of 2012. I have noticed this from the Intel User Forum.

• Intel Parallel Debugger Extension has been deprecated?

Nov 14th - 23th:

• Links about Debug Multithreaded Applications in Visual Studio

1. How to: Use the Threads Window
2. How to: Use the Parallel Watch Window
3. Using the Parallel Stacks Window

alt text
Callout Letter	Element Name	Description
A	Call Stack Segment or Node	Contains a series of method contexts for one or more threads.
B	Blue Highlight	Present the call path of the current thread.
C	Arrow lines	Connect nodes to make up the entire call path for the thread(s).
D	Tooltip on Node Header	Shows the ID and user-defined name of each thread whose call path shares this node.
E	Method Context	Represents one or more stack frames in the same method.

Sample code to use debugging

• Sample code can be downloaded from here Intel(R) Cilk(TM) quick sort

• • Data flow of parallel_qsort

alt qsort_set1 Recursive calling parallel_qsort of spawning parallel_qsort in the first parallel_qsort function which main thread has responible for	alt qsort_set2 The moment right after a spawning thread works in second parallel_qsort calling which Main Thread had finished
alt qsort_set4_1 For two level parallel_qsort function calling and two level spawning call to parallel_qsort, two Threads are working for this; Worker3 and Worker2
alt qsort_set4_done The moment that Main Thread is working for getting out of the previous spawing thread calling to parallel_qsort and 3d and 4th element values in the data array are excnaged in memory.
alt dataflow

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• Debugging Tips

1. Hit F9 at the front of a line to put the breakpoints
2. Run the program in Debug mode first and then open the windows you need.
3. Open the windows like Memory, Threads, Parallel Stacks, and Local or Auto.
4. Hit F10 or F11 to run codes line by line
5. F9 to put or remove breakpoints

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Links about Intel® Parallel Studio XE 2017

1. link1 Intel® Parallel Studio XE 2017
2. link2 Intel® Parallel Studio XE 2017
3. link Intel® Parallel Studio XE Release Notes