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Introduction to performance optimization using Intel SW tools - тест 2

Упражнение 1:

Номер 1

 What is VTune™ Performance  Analyzer for?

Ответ:

(1) optimizing applications

(2) analyzing application performance

(3) decreasing application size

(4) speedup application compilation

Номер 2

 What kind of information is obtainable via VTune?

Ответ:

(1) where the time is spent

(2) why the program is not effective

(3) where the dead code is

(4) where the code has wrong formatting

(5) where to improve the code

Номер 3

 What is the requirements of VTune?

Ответ:

(1) use only С++

(2) each source file must be not more than 150 kb

(3) header files must match to the VTune standard

(4) none of the answers

Упражнение 2:

Номер 1

 VTune supports:

Ответ:

(1) only C/C++

(2) only languages, supported by Intel compiler

(3) only languages, supported by Microsoft Visual Studio

(4) none of the answers

Номер 2

 What operation system VTune supports?

Ответ:

(1) OS/2

(2) VAX-VMS

(3) PDP-11

(4) Windows

(5) Linux

Номер 3

 What abilities does VTune has?

Ответ:

(1) Microsoft Visual Studio integration

(2) multicore and multiprocessor support

(3) wrong memory access detection

(4) processor event collecting

(5) processor wasted energy counting

Упражнение 3:

Номер 1

 What analysis types are included in VTune?

Ответ:

(1) Hotspots

(2) Locks and Waits

(3) Valgrind

(4) Concurrency

Номер 2

 What are functions of the Hotspots?

Ответ:

(1) detecting places with potentially ineffective code

(2) showing thread activity

(3) showing microarcitecture problems

(4) provides binary instrumentation of the user program

Номер 3

 What is profiling?

Ответ:

(1) binary instrumentation

(2) events collecting

(3) rebuild of the entire project

(4) use manual writing

Упражнение 4:

Номер 1

 What are locks and waits for?

Ответ:

(1) detecting critical memory parts and corresponding critical code parts for each piece of memory

(2) collecting thread wait count and time

(3) collecting function call sequence

Номер 2

 What event corresponds processor clock ticks?

Ответ:

(1) L2_LINES_IN.SELF.DEMAND

(2) BUS_TRANS_ANY.ALL_AGENTS

(3) CPU_CLK_UNHALTED.CORE

(4) none of answers

Номер 3

 What event corresponds wrong branch prediction?

Ответ:

(1) L2_LINES_IN.SELF.DEMAND

(2) INST_RETIRED.ANY

(3) BR_INST_RETIRED.MISPRED

(4) none of answers

Упражнение 5:

Номер 1

 What may be cause of ineffective resource utilization?

Ответ:

(1) resource concurrency

(2) bottlenecks

(3) big amount of data dependencies

(4) sequential command execution

Номер 2

What is critical code?

Ответ:

(1) code executed more frequently

(2) code, which could be deleted without any changes in results

(3) wrong code

(4) code, which is not proved to be correct

(5) undocumented code

Номер 3

 What conditions can prevent vectorization?

Ответ:

(1) nothing

(2) dependency between different iterations

(3) data dependencies

(4) lack of data dependencies

(5) lack of iteration dependencies

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